User Instructions VX Series
Professional Power Amplifiers
American Audio
®
6122 S. Eastern Ave
Los Angeles Ca. 90040
6/09
VX Series
User Instructions
This symbol is intended to alert the user to the presence of non insulated "dangerous voltage" within the product's enclosure that may be of sufficient magnitude to
constitute a risk of electric shock to persons.
This symbol is intended to alert the user of the presence of important operating and maintenance (servicing) instructions in the literature accompanying the product.
Caution: Risk of the electrical shock - Do not open!
Caution: To reduce the risk of electrical shock, do not remove cover. No user serviceable parts inside. Refer all servicing to qualified service personnel.
Warning: To prevent electrical shock or fire hazard, do not expose this amplifier to rain or moisture. Before using this amplifier, read the user manual for further warnings.
Este símbolo tiene el propósito de alertar al usuario de la presencia de “voltaje peligroso“ que no tiene aislamiento dentro de la caja del producto que puede tener
una magnitud suficiente como para constituir riesgo de corrientazo.
Este símbolo tiene el propósito de alertar al usuario de la presencia de instrucciones importantes sobre la operación y mantenimiento en la literatura que vienc con
el producto.
Precaución: Riesgo del choque eléctrico - no se abra
Precaución: Para disminuir el riesgo de choque eléctrico, no quite la cubierta. No hay piezas adentro que el usario puede reparar. Deje todo mantenimiento al los técnicos cualificados.
Advertencia: Para prevenir choque eléctrico o riesgo de incendios, no deja expuesto a la lluvia o a la humedad este amplificador. Antes de usar este amplificador, lea
mas advertencias en la guia de operacion.
Ce symbole est utilisé pur indiquer à l’utilisateur la présence à l'intérieur de ce produit de tension non-isolée dangereuse pouvant être d'intensité suffisante pour
constituer un risque de choc électrique.
Ce symbole est utilisé pour indiquer à l’utilisateur qu'il trouvera d'importantes instructions importantes sur l'utilisation et l'entretien de l'appareil dans la littérature
accompagnant le produit.
Attention: Risque de choc électrique - Ne pas ouvrir!
Attention: Afin de réduire le risque de choc électrique, ne pas enlever le couvercle. Il ne se trouve à l’intérieur aucune piéce pouvant être réparée par l'utilisateur. Confier
l'entretien à un personnel qualifié.
Avertissement: Afin de prévenir les risque de décharge ou de feu, n’exposez pas cet appareil à la pluie ou à l’humidité. Avant d’utiliser cet amplificateur, lisez les avertissements supplémentaries situés dans le guide.
Dieses Symobl soll den Anwender vor unisollierten gefährlichen Spannungen innerhalb des Gehäuses warnen, die von Ausreichender Stärke sind, um einen elektrischen Schlag verursachen zu können.
Dieses Symobl soll den Benutzer auf wichtige Instruktionen in der Bedienungsanleitung aufmerksam machen, die Handhabung und Wartung des Produkts betreffen.
Vorsicht: Risiko - Elektrischer Schlag! Nicht öffnen!
Vorsicht: Um ddas Risiko eines elektrischen Schlages zu vermeiden, nicht die Abdeckung enfernen. Es befinden sich keine Teile darin, die vom Anwender repariert
werden könnten. Reparaturen nur von qualifizierte Fachpersonal durchführen lassen.
ACHTUNG: Um einen elektrischen Schlag oder Feuergefahr zu vermeiden, sollte diesen Gerät nicht dem Regen oder Feuchtigkeit ausgesetz werden. Vor Inbetriebnahme
unbedingt die Bedienungsanleitung lesen.
©American Audio® - www.americanaudio.com - VX Series™ Power Amplifier User Manual Page 2
CAUTION
Do not open risk of electric shock
CAUTION: TO REDUCE THE RISK OF ELECTRIC
SHOCK, DO NOT REMOVE THE COVER.
THERE ARE NO USER SERVICEABLE PARTS
INSIDE. REFER ALL SERVICE TO YOUR
AUTHORIZED AMERICAN AUDIO® DEALER.
The lightning flash with an arrow triangular
symbol is intended to alert the user to the
presence of non insulated “dangerous voltage” within the products enclosure, and
may be of sufficient magnitude to constitute a risk of electric shock.
The exclamation point triangular symbol is
intended to alert the user to the presence
of important operating and maintenance
(servicing) instructions in the user manual
accompanying the amplifier.
FOR OPTIMUM PERFORMANCE AND
RELIABILITY DO NOT PRESENT THE
AMPLIFIER WITH A SPEAKER LOAD
OF LESS THAN 2 OHMS OR ANY
COMBINATION OF SPEAKERS THAT
TOGETHER ARE LESS THAN 2 OHMS!
POUR ASSURER L A FIABILETE ET
OBTENIT UNE PERFORMANCE OPTIMALE,
NESOUMETTE JAMAIS L’AMPLIFICATEUR
A UNE CHARGE D’IMPEDANCE TOTALE
INFERIEURE A 2 OHMS, NI AVEC UN H.P. NI
EN COMBINAISON DES H.P.
USING ONE SPEAKER, IT MUST BE AVEC UN H.P., IL FAUT UNE CHARGE
D’IMPEDANCE MINIMUM DE 2 OHMS.
RATED AT 4 OR MORE OHMS.
USING TWO SPEAKERS, THEY MUST AVEC DEUX H.P., FAUT POUR CHAOUN UNE
RATED EACH AT 4 OR MORE OHMS.
CHARGE D’IMPEDANCE MINIMUM DE 4
OHMS.
USING THREE SPEAKERS, THEY
MUST BE RATED EACH AT 8 OR MORE AVEC TROIS H.P., FAUT POUR CHAOUN UNE
OHMS.
CHURGE D’IMPEDANCE MINIMUM DE 8
OHMS.
CONTENTS:
Safety Precautions.......................................................................................................................................................................................4
Introduction...............................................................................................................................................................................................4
Front Panel...................................................................................................................................................................................................5
Rear Panels..................................................................................................................................................................................................6
Inputs...........................................................................................................................................................................................................8
Outputs............................................................................................................................................................................................................8
Speakon Output Connector Assembly.......................................................................................................................................................10
Operating Modes........................................................................................................................................................................................11
Protection Circuitry
Limiter.................................................................................................................................................................................................13
Short Circuit Protection...................................................................................................................................................................13
Thermal Protection..........................................................................................................................................................................13
Amplifier Features.......................................................................................................................................................................................13
Amplifier Password/Lock Feature...............................................................................................................................................................16
Speaker Setup............................................................................................................................................................................................15
Warranty.................................................................................................................................................................................................16
Specifications...............................................................................................................................................................................................17
©American Audio® - www.americanaudio.com - VX Series™ Power Amplifier User Manual Page 3
Important Precautions
Introduction
•To reduce the risk of electrical shock or fire, do not expose this Introduction: Congratulations and thank you for purchasing
this American Audio® VX Series™ amplifier. This amplifier is a
unit rain or moisture.
representation of American Audio’s continuing commitment to
•Do not spill water or other liquids into or on to your unit.
•Do not attempt to operate this unit if the power cord has been produce the best and highest quality products all at an affordable
price. Please read and understand this manual completely before
frayed or broken.
attempting to operate your new amplifier. This booklet contains
•Do not attempt to remove or break off the ground prong from the electrical cord. This prong is used to reduce the risk of elec- important information concerning the proper and safe operation of
your new amplifier.
trical shock and fire in case of an internal short.
•Disconnect main power before making any type of connection
Unpacking: Every VX Series™ amplifier has been thoroughly test• Do not remove the cover under any conditions. There are no
ed and has been shipped in perfect operating condition. Carefully
user serviceable parts inside.
check the shipping carton for damage that may have occurred
•Never plug this unit in to a dimmer pack.
during shipping. If the carton appears to be damaged, carefully
•Always be sure to mount this unit in an area that will allow inspect your unit for any damage and be sure all accessories necproper ventilation. Allow about 6” (15cm) between this device
essary to operate the unit has arrived intact. In the event damage
and a wall.
has been found or parts are missing, please contact our toll free
•Do not attempt to operate this unit, if it becomes damaged.
customer support number for further instructions. Please do not
•This unit is intended for indoor use only, use of this product out- return the amplifier to your dealer without contacting customer
doors voids all warranties.
support first.
•During long periods of non-use, disconnect the unit’s main
Installation: This amplifier is designed to mount into a standard
power.
19” rack. The front panel provides four holes used to screw the
•Always mount this unit in a safe and stable manner.
unit into a rack. The unit also provides a way to rear mount the
•Power cords should be routed so they are not likely to be unit into a rack for added security. Rear mounting the unit is espewalked on, pinched by items placed upon or against them.
cially recommended for this amplifier if the unit is to mounted into
• Cleaning -The outside of the unit should be wipe down with a
a mobile rack.
soft cloth and mild cleaner when needed.
•Heat -The appliance should be situated away from heat sources Customer Support: American Audio® provides a toll free customer support line, to provide set up help and to answer any question
such as radiators, heat registers, stoves, or other appliances should you encounter problems during your set up or initial opera(including amplifiers) that produce heat.
tion. You may also visit us on the web at www.americanaudio.com
•The fixture should be serviced by qualified service personnel
for any comments or suggestions. For service related issue please
when:
contact American Audio ®. Service Hours are Monday through
A. The power-supply cord or the plug has been damaged.
B. Objects have fallen on, or liquid has been spilled into the unit. Friday 9:00 a.m. to 5:00 p.m. Pacific Standard Time.
Voice: (800) 322-6337
E-mail: [email protected]
C. The appliance has been exposed to rain or water.
Fax:
(323)
582-2610
D. The fixture does not appear to operate normally or exhibits a marked change in performance.
©American Audio® - www.americanaudio.com - VX Series™ Power Amplifier User Manual Page 4
1 2
Front Panel
VX1000
VX1500
VX2500
12
11
1. Channel Signal Indicators - These green and yellow LED’s will glow
according to the average signal output.
2. Channel Protect Indicator - The red Protect LED will begin to glow
when the channel goes into protect mode. When the channel goes into
protect mode all output for that channel will turn off. This is to protect any
speakers connected to the channel.
3. Power Switch - This switch is used to control the units main power.
4. LCD Screen - This LCD screen lets you know the current temperatures of both channels. It also will display the different menus and settings when accessed using the Menu and Enter buttons.
3 4
10
9
8
5
7
6
Figure 1
menu settings.
10. Menu Button - This button, when pushed, lets you access the amp
menu. Continue to push to scroll through the menu choices
11. Function Indicators - These indicators detail the operating mode of
the amplifier. This blue LED will also function as a power indicator.
12. Channel A Gain Control - This rotary knob is used to control the
output signal of channel A. Turning the knob in a clockwise direction will
increase signal output.
5. Channel Limiter Indicator - This red LED will begin to flash when the
respective channel begins to overload (clip). At this point channel one will
begin to distort. Under heavy clipping activity lower the channels gain
control to reduce the risk of damage to your speakers and amplifier. This
LED may glow when the unit has been turned off, this is normal.
6. Channel B Gain Control - This rotary knob is used to control the
output signal of channel B. Turning the knob in a clockwise direction will
increase signal output.
7. Enter Button - This button will allow you to access the different settings located in the menu. Push this button to set your desired setting.
8. Down Button - This button allows you to scroll backwards when in
the menu settings.
9. Up Button - This button allows you to scroll forwards when in the
©American Audio® - www.americanaudio.com - VX Series™ Power Amplifier User Manual Page 5
Rear Panel Control
VX1000 & VX1500
21
22
32
23
31
24
30
29
25
28
26
27
21. Cooling Fans - Dual high speed cooling fans
21
Figure 2
30. Ground On/Off Switch - If hear a hum or any interference, put the Ground
22. Channel A XLR Input - Channel two 3-pin XLR balanced input jack. See switch in the “On” postion .
page 9 for more details.
31. Channel B TRS Input - Channel one 1/4” female jack. Excepts either a bal23. Channel A XLR Outputs - Channel two 1/4” female jack. Excepts either a anced or unbalanced plug. See page 9 for more details.
balanced or unbalanced plug. See page 9 for more details.
32. Channel B XLR input - Channel one 3-pin XLR balanced input jack. See
24. Channel 2 Speakon Output - Optional speaker output connections. Use page 9 for more details.
pins 1+ and 1- of this 4-pole Speakon connector to connect to your speaker’s
Speakon input jack.
25. Channel 2 Output Jack/5 way Binding Post - Connect to your speaker’s
input jack. Red is positive signal and Black is negative signal.
26. AC Cord - Plug this cable into a standard wall outlet. Check that the voltage
in your area matches the amplifiers required voltage.
27. Fuse Holder - This housing stores a 20 amp GMA protective fuse for the
VX1000 and 25 amp GMA protective fuse for the VX 1500. Never defeat the
fuse, the fuse is designed to protect the electronics in the event of severe power
fluctuations. Always be sure to replace the fuse with an exact match as the one
being replaced, unless otherwise told to do so by an authorized American Audio® service technician.
28. Channel 1 Output Jack/5 way Binding Post - Connect to your speaker’s
input jack. Red is positive signal and Black is negative signal.
29. Channel 1 Speakon Output - Optional speaker output connections. Use
pins 1+ and 1- of this 4-pole Speakon connector to connect to your speaker’s
Speakon input jack.
©American Audio® - www.americanaudio.com - VX Series™ Power Amplifier User Manual Page 6
Rear Panel Control
VX2500
33
34
44
35
43
42
33. Cooling Fans - Dual high speed cooling fans
34. Channel A XLR Input - Channel A 3-pin XLR balanced input jack. See page
9 for more details.
36
37
41
40
38
39
33
Figure 3
42. Ground On/Off Switch - If hear a hum or any interference, put the Ground
switch in the “On” postion .
43. Channel B XLR Output - Channel B XLR output jack. Excepts either a balanced or unbalanced plug. See page 9 for more details.
35. Channel A XLR Ouput - Channel A XLR output jack. Excepts either a bal44. Channel B XLR Input - Channel B 3-pin XLR balanced input jack. See page
anced or unbalanced plug. See page 9 for more details.
9 for more details.
36. Channel A Speakon Output - Optional speaker output connections. Use
pins 1+ and 1- of this 4-pole Speakon connector to connect to your speaker’s
Speakon input jack.
37. Channel A Output Jack/5 way Binding Post - Connect to your speaker’s
input jack. Red is positive signal and Black is negative signal.
38. Fuse Holder - This housing stores a 30 amp GMA protective fuse. Never
defeat the fuse, the fuse is designed to protect the electronics in the event of
severe power fluctuations. Always be sure to replace the fuse with an exact
match as the one being replaced, unless otherwise told to do so by an authorized American Audio® service technician.
39. AC Cord - Plug this cable into a standard wall outlet. Check that the voltage
in your area matches the amplifiers required voltage.
40. Channel B Output Jack/5 way Binding Post - Connect to your speaker’s
input jack. Red is positive signal and Black is negative signal.
41. Channel B Speakon Output - Optional speaker output connections. Use
pins 1+ and 1- of this 4-pole Speakon connector to connect to your speaker’s
Speakon input jack.
©American Audio® - www.americanaudio.com - VX Series™ Power Amplifier User Manual Page 7
Set Up
INPUT - The VX Series amplifiers have one XLR jack for balanced input per channel. Use this connection to connect the output signal
from a mixer, cross-over or EQ to your VX Series amplifier. A balanced connection is recommended for cable runs longer that 20ft.
When constructing your own XLR cables follow the pin configuration describe below for proper connections. You may use the two
XLR “Input Thru” jacks to jump a parallel connection to another amplifier or other device. For Example: Connect a XLR cable to the
input of channel one. You may now connect a XLR cable from the channel one “Input Thru” jack to the input jack of another amplifier’s
channel one input. This will reduce the use of “Y” cables.
Male XLR Pin Configuration:
US ITT Standard
2
1
3
2 Hot (+ data)
Figure 4
1 Ground/Return/ 0v)
3 Return (- data)
OUTPUTS:
Binding Post/Banana Plug - Connect your speakers to the binding post outputs on the rear of the amplifier. The
speaker wire may be connect by bare wire (directly connected, usually for permanent connections), banana plug,
or spade connector. Connections are made to Channels 1 and 2 output’s for stereo mode or across the red terminals of Channels 1 and 2 for Mono Bridge Mode.
Important Notice: Although a speaker will operate with the positive and negative leads plugged into either terminal on the amplifier binding post, be sure to plug the negative lead into the black terminal and positive lead
into the red terminal. Ensuring proper polarity will avoid speakers being out of phase, that can cause a loss of
Figure 5
bass response.
Important Notice: Banana Plugs - When connecting your speakers to the amplifier using banana jacks; Be sure that the red and black
caps on the binding post are completely screwed in. Insert the banana jacks into the caps of the binding post, be sure that the banana
jack is inserted securely to avoid the risk of it popping out.
©American Audio® - www.americanaudio.com - VX Series™ Power Amplifier User Manual Page 8
Bare Wire Connections: (Figure 9)
When connecting your speakers to the amplifier using bare wire; loosen the red and
black caps on the binding post, be sure not to completely remove or unscrew the red
and black caps. Strip back the wire insulation 1/2” (13mm). Insert the bare wire into the
hole that was reveled by unscrewing the binding post cap. After inserting the wire into
the binding post hole, screw the binding post cap down on the wire. To reduce the risk of
shock or damage to your amplifier, be sure that the wire connected to one binding post
does not come in contact with that of another. Recommended wire guage is 12.
Spade Connector: (Figure 7)
Figure 6
Typical speaker output using bare wire. Insert
bare wire into the binding post and tighten.
When connecting your speakers to the amplifier using spade connector; Unscrew the red and black caps on
the binding post, be sure not to completely remove or unscrew the red and black caps. Insert the spade connector in to the binding post and tighten the caps down on the spade connector. To reduce the risk of shock
or damage to your amplifier, be sure that the wire connected to one binding post does not come in contact
with that of another.
When connecting your speakers to the amplifier using banana jacks; Be sure that the red and black caps on
the binding post are tighten down completely. Insert the banana jacks into the caps of the binding post, be
sure that the banana jack is inserted securely to avoid the risk of it popping out.
Mono Bridge Connections:
Mono bridge operation connections will follow the above descriptions however, when operating in mono
bridge operation the speaker connections will run between the two positive (red) leads. Use channel two positive output terminal for the negative connection and the channel one positive output terminal for the positive
connection.
Figure 7
Typical speaker output using
spade connectors. Insert
bare wire into the binding
post and tighten.
Stereo Connections Using the Neutrik Speakon output connectors:
Recent regulatory requirements in Europe have outlawed the use of the dual banana plug and force amp users to terminate their speaker
cables with spade lugs or bare wire ends. This is not advantageous to most users that want to reconfigure their systems or quickly
change out an amp. The Neutrik Speakon® connector provides the most convenient solution to this problem, eliminating the need for
spade plugs or bare wire end cables. Major speaker manufacturers have been using Speakon connectors on their products for years,
so chances are you are ready to use the Speakon connection. With Speakon connectors, you can connect straight from the amplifier
to the speaker. The Speakon connector used on this amplifier meets all known safety regulations. Once wired correctly, the connector
cannot be plugged in backwards, causing the type of inverted polarity situations that have become common with banana hookups. This
connection will provide a safe, secure and reliable method of connecting your speakers to your new amplifier. You can purchase the
Speakon® NL4FC connectors from your local audio dealer.
©American Audio® - www.americanaudio.com - VX Series™ Power Amplifier User Manual Page 9
Speakon Assembly: You will need a pair of Neutrik Speakon® NL4FC
connectors. You will also need high-quality two or four conductor speaker
cable, a pair of needle-nosed pliers and a 1.5-mm Allen key to assemble the
Speakon connectors to your speaker wire. To assemble the Neutrik Speakon
NL4FC connector, complete the following steps:
1. Strip back 3/4-inch of the cable casing. Strip off 1/4-inch from the end of
each of the conductors down to bare wire, and insert the brass fittings. See
Figure 8.
2. Slide the cable tension clip (D) and the speakon coupler (E) through the
cable end. See Figure 9.
3. Insert each wire with the brass fittings into the top of appropriate slot of the
connector insert (B) as shown in Figures 9 and 10. Use a 1.5-mm Allen key to
tighten the connection. See Figure 10.
4. Be sure to properly match the positive (+) and negative (–) leads of each
wire. See Figure 11. For Bridge-Mono connection see Figure 12.
5. Slide the connector insert (B) into the connector housing (A), making sure
that the large notch on the outer edge of the insert lines up with the large
groove on the inside of the connector housing. The insert should slide easily
through the housing and out the other side until it extends approximately 3
/4-inch from the end of the housing.
6. Slide the cable tension clip (D) along the cable and insert into the housing
(A), making sure that the large notch lines up with the large groove on the
inside of the connector housing (A). The cable tension clip (D) should slide
easily into the housing until only 3 /8-inch of the cable tension clip (D) extends
from the back end of the connector.
7. Slide the coupler (E) along the cable and screw it onto the end of the
housing (A). Before tightening, you may want to test the connector to make
sure it has been assembled properly.
Figure 8
Brass Inserts
4-Conductor Speaker Cable
Figure 9
A
B
C
D
E
Figure 10
Figure 11
INPUT BA ANCE
SPEAKON
C2
MINIMUM LOAD IMPEDANCE 2 OHM PERCHANNEL 4 OHM BRIDGE
C1
-
+1
+2
C2
-B I D E+
N
+
+
C1
120 60
4800 ATTS
-
+2
+1
-1
+
INPUT T U
CAUTION
1+ HOT
1 COLD
UTPUTS
+2
-1
+2
+
Figure 12
INPUT BA ANCE
INPUT T U
+
+1
C1
SPEAKON
-
120 60
4800 ATTS
+2
-1
+
©American Audio® - www.americanaudio.com - VX Series™ Power Amplifier User Manual Page 10
+2
C2
CAUTION
1+ HOT
1 COLD
UTPUTS
MINIMUM LOAD IMPEDANCE 2 OHM PERCHANNEL 4 OHM BRIDGE
C1
-
C2
-B I D E+
N
+
MENUS:
MODE: When you enter this menu you can choose your desired setting between Stereo, Bridge, or Parallel. See page 12 for descriptions. Press Enter to make your selection.
LOW CUT: In this menu you choose either On or Off, and then press Enter to select you setting. If you set it to On, and press Enter, you
are now able to choose between 30Hz or 50Hz. When set to 30Hz, any singnal below 3oHz will be cut. When set to 50Hz, any signal
below 50Hz will be cut. Press Enter to select your setting, and press the Menu button to exit.
SENSITIVITY: In this menu you can choose either 1.0V, .775V, or 1.44V. Press Enter to make your selection, and press Menu to exit.
FILTER: In this menu you can choose Full Range, Top 100Hz or Sub 100Hz. Top 100Hz is best for two or three way speakers. Sub 100Hz
is best for powering sub woofers. Press Enter to make your selection, and press Menu to exit.
RESET TO DEFAULT: To reset to default settings, press Enter to enter the menu and then press Enter again to reset. Press the Menu
button to exit.
PASSWORD CHANGE: In the menu you can change the password to your desired password. See page 14 for more information.
Operating Modes: Always configure your amplifier operating mode before beginning operation. If you want to change it during
performance. You must decrease the gain controls to their lowest levels to protect the speakers from any popping noise.
Stereo Operation - Page 14/Figure 13 details an example of a typical stereo set-up. Enter into the Menu and go to the Mode set-
ting, set the amp to Stereo and press Enter. Connect your inputs into channels one and two of the amplifier. Connect your speakers to
the outputs on the rear of the amplifier. Be sure that your front gain controls are turned down to their lowest level (full counter-clockwise). Turn your amp on. Turn your input source level up. Use your front gain controls to regulate the output volume. Be sure not to
raise the volume to the clip level, however an intermittent clip signal is acceptable.
Mono Bridge Operation - Page 14/Figure 14 details a mono bridge set-up. Be sure your amplifier and all other audio equipment
is powered down. Enter into the Menu and go to the Mode setting, set the amp to Bridge and press Enter. Connect an input signal to
channel one. Connect your speaker across the red output binding post on the rear of your amplifier. Turn your equipment on (your
amplifier should always be the last item you turn on). Apply an input source signal to your amplifier. Turn channel two gain up. Use the
channel one gain to regulate your amplifier output.
Bridged-Mono Mode Caution - The voltage across the output terminals of a bridged VX Series™ amplifier may equal or exceed
100 volts RMS and may be as high as 130 volts. Use fully insulated CLASS ONE wiring, and the load must be rated for up to 2500 watts
(@4 ohms)
Parallel Mono - “Parallel ” ties the two channel line inputs together so that they will both be driven by the same signal, without the
need for external jumpers or wiring. Both amplifier channels will operate independently. Though they carry the same signal, their gain
controls affect only their respective channels, and they both must use their respected speaker outputs. Never attempt to parallel the
speaker outputs, this may cause serious damage to your amplifier! This mode is recommended when using the VX Series™ to run bass
speakers, to achieve better low end. To run in parallel mono mode connect your system as you would if you were going to run in stereo
mode. Enter into the Menu and go to the Mode setting, set the amp to Parrallel and press Enter. Be sure the amp is off or the power is
disconnected before making any changes.
©American Audio® - www.americanaudio.com - VX Series™ Power Amplifier User Manual Page 11
Mono Subwoofer - This operation is similar to the Stereo Subwoofer operation but in mono. When running subwoofers it is usually
recommended to run them in mono mode to achieve a cleaner tighter low end. This operation allows you to run several subwoofers
down to a minimum of 4 ohms. To avoid amplifier overheating, never run the amplifier below 8 ohms in this mode. Set up this mode
as you would a standard stereo set up. In this mode you may use the frequency adjustment on the rear of the amp, to control the bass
frequency output level. Frequencies may be adjusted from 20Hz to 200Hz.
PROTECTION:
Limiter - Only the VLP 1500 and 600 come with a built in limiter. When the input signal overloads, the “CLIP LED’s” indicate a signal overload, at this time, the master volume should be lowered to reduce distortion. If the input gain level is not reduced the built-in
limiter will activate. During signal overload, the limiter will reduce the input audio signal enough to minimize the amount of clipping.
A limiter takes the gain of an overloading signal and reduces it, the reduction in gain reduces distortion that can cause damage to
your speakers and amplifier. During normal operation below clipping, and momentary clips on peaks, the limiter does not affect the
audio signal and is inaudible. It will allow brief clipping of peaks and will only activate when continuous, hard clipping occurs. During
excessive clipping the limiter will reduce the audio signal enough to minimize the amount of clipping. When the input signal decreases
enough that clipping ends, the limiter will deactivate and cease its gain reduction. The limiter has a fixed threshold and can not be
adjusted.
Safe Power Levels at Different Output Loads:
8-Ohm Loads: The amplifier can operate at practically any power level without risk of overheating. However, if it is pushed hard
enough to continually light the “CLIP ” indicator, the amplifier’s average output power can reach 150 watts.
4-Ohm Loads: If the “CLIP” indicator flashes occasionally, the amplifier is approaching its maximum long-term power capacity. If it is
lit about half the time, the amplifier channel will probably go into thermal protection within a few minutes.
Short Circuit Protection - The VX Series™ amplifiers all come with built-in Output Short Circuit Protects. The Output Short Circuit
Protection protects the output devices of the amplifier from short circuits and stressful loads. If your speaker lines short, the amplifier automatically detects this problem and discontinues operation for that channel. If one side of your amplifier becomes shorted and
goes into protect mode, the other side will continue to operate normally. During short circuit protection, the "Clip" LED and “Protect"
LED will light simultaneously indicating amplifier fault. All channel output during the “Short Circuit Protection" will be interrupted (i.e.
no sound out
©American Audio® - www.americanaudio.com - VX Series™ Power Amplifier User Manual Page 12
put). Short Circuit Protection can usually be traced back to the signal output line (i.e. speaker line). Check the line from the output terminal of the amplifier to the speaker. If this line good, check the internal speaker connections and components. A short circuit will usually be traced to a bad cable or a bad speaker component and is rarely traced to the amplifier itself.
Thermal Protection - Dual variable speed fans on the VX Series amplifier provide adequate cooling. During low level output the fans
run at normal speeds. During high output and as heat raises, (exceeding 90°C.), the fans will run at higher speeds to aid the cooling
process. If the heatsink temperature exceeds 91°C., the amplifier will mute until the amplifier cools down. When the amplifier cools
below 90°C., the amplifier will return to normal operations. Be sure not to operate your amplifier below the minimum load ratings to
reduce the risk of overheating problems.
Input/Output Protection - The input circuits are isolated by 10k resistors. An ultrasonic network uncouples RF from the output and
helps keep the amplifier stable with reactive loads.
Operating Voltage (AC Mains) - The serial number label indicates the correct AC main voltage. Connecting to the wrong voltage is
dangerous and may damage the amplifier. Always be sure the source voltage for your areas matches the required voltage for your
amplifier.
Gain Controls - The gain controls are located on the front panel and are calibrated in 2dB of attenuation from full gain. It is best to
adjust the amplifier so no “hissing” is heard from speakers with no music being played, this will ensure the lowest possible distortion
during normal operation.
AMPLIFIER FEATURES:
THRU - Thru will allow the user to daisy-chain one amplifiers signal input into another amplifier. Plug the signal source outputs into the
first amplifier’s input, patch from the amplifier’s THRU jacks to the next amplifier’s input, and so on, daisy-chaining as many amplifiers
as there is no excessive level loss. Is not affected by crossover setting.
GROUND LIFT SWITCH - Applying or lifting the ground switch will change the level for background noise and hum, if the noise level
remains the same in either position, it is better to keep the ground lift switch in the ground position. This will eliminate 60Hz cycle hum
that is sometimes induced when mounting several units in the same rack.
OPERATING VOLTAGE (AC MAINS) - The serial number label indicates the correct AC main voltage. Connecting to the wrong voltage
is dangerous and may damage the amplifier.
GAIN CONTROLS - The gain controls are located on the front panel and are calibrated in 2dB of attenuation from full gain. It is best to
adjust the amplifier so no “hissing” is heard from speakers with no music being played, this will ensure the lowest possible distortion
during normal operation.
LED INDICATORS - Each channel has five LEDS. Two LEDs indicate signal level activity; two green LEDs. One yellow LED indicates
signal clipping. One red LED indicates protections mode for shorts/ overload. One blue LED indicates power for each individual channel.
©American Audio® - www.americanaudio.com - VX Series™ Power Amplifier User Manual Page 13
AMPLIFIER PASSWORD/LOCK FEATURE:
Use this feature to lock in your settings and prevent accidental adjustments.
THE INITIAL USER PASSWORD IS 88. With user password, you can enter and change the setting of the amp. If the wrong password
is entered, “PASSWORD: Error” will be displayed. You can change the initial password to set your own password.
The default password is 86548. With this password you can change the setting of the amp regardless to whatever password is
set. If the wrong password is entered, “PASS WORD: Error” will be displayed. If you cannot remember your password, use the default
password.
How to SET/change your password:
1. Make all your desired settings and adjustments.
2. Press the MENU button, until the screen displays “NEW PASS Wd: 0 1 2 3 4 5 6 7 8 9”.
3. Next, press the UP or DOWN buttons to move the cursor right or left, to your desired number. Press ENTER to select your desired number.
4. Your password must be 5 numbers long. The new password will be saved by the amp automatically, and the LCD will return back to the regular screen displaying the working mode and temperature.
HOW TO CHANGE PASSWORD STATUS:
1. Choose your desired password.
2. Press the MENU button, until “MENU Pass Word SEL” is displayed.
3. Press the ENTER button to enter the password status menu. The screen should display “Pass Word SEL”, with either “Pass Word ON” or “Pass Word OFF” also displayed. Using the UP or DOWN buttons you can chose between either ON or OFF. Find your
desired setting and press ENTER to make your selection.
4. If the Password Status is set to “OFF”, you do not need to enter your password to make adjustments to the amp settings.
If the Password Status is set to “ON”, you will have to enter your password to make adjustmetns to the amp settings.
©American Audio® - www.americanaudio.com - VX Series™ Power Amplifier User Manual Page 14
Typical Stereo Output Connections
Use Speakon or Banana Jacks
Figure 13
SPEAKERS
4 OHM MINIMUM
TYPICAL Mono bridge SET-UP
Use Channel 1 Input Only (XLR Jack)
Figure 14
X
Use the two positive binding post
termainals (red) for speaker output.
SPEAKERS
8 OHM MINIMUM
©American Audio® - www.americanaudio.com - VX Series™ Power Amplifier User Manual Page 15
SPEAKERS
4 OHM MINIMUM
The VX Series carries a one year limited warranty. We recommend you fill out the enclosed warranty card to validate your purchase. All
returned service items whether under warranty or not, must be freight pre-paid and accompany a R.A. (return authorization) number. If the
mixer is under warranty, you must provide a proof of purchase invoice. You may obtain a R.A. number by contacting our customer support
team on our toll free number. Please contact American Audio® customer support at (800) 322-6337 for a R.A. number. All package
not displaying a R.A. number on the outside of the package will be returned to the shipper.
1-YEAR LIMITED WARRANTY
A. American Audio® hereby warrants, to the original purchaser, American Audio® products to be free of manufacturing defects in material and workmanship for a period of 1 Year (365 days) from the date of purchase. This warranty shall be valid only if the product is purchased within the United
States of America, including possessions and territories. It is the owner’s responsibility to establish the date and place of purchase by acceptable
evidence, at the time service is sought.
B. For warranty service, send the product only to the American Audio® factory. All shipping charges must be pre-paid. If the requested repairs or
service (including parts replacement) are within the terms of this warranty, American Audio® will pay return shipping charges only to a designated
point within the United States. If the entire instrument is sent, it must be shipped in its original package. No accessories should be shipped with
the product. If any accessories are shipped with the product, American Audio® shall have no liability whatsoever for loss of or damage to any such
accessories, nor for the safe return thereof.
C. This warranty is void if the serial number has been altered or removed; if the product is modified in any manner which American Audio® concludes, after inspection, affects the reliability of the product; if the product has been repaired or serviced by anyone other than the American Audio®
factory unless prior written authorization was issued to purchaser by American Audio®; if the product is damaged because not properly maintained
as set forth in the instruction manual.
D. This is not a service contract, and this warranty does not include maintenance, cleaning or periodic check-up. During the period specified above,
American Audio® will replace defective parts at its expense, and will absorb all expenses for warranty service and repair labor by reason of defects
in material or workmanship. The sole responsibility of American Audio® under this warranty shall be limited to the repair of the product, or replacement thereof, including parts, at the sole discretion of American Audio®. All products covered by this warranty were manufactured after January 1,
1990, and bear identifying marks to that effect.
E. American Audio® reserves the right to make changes in design and/or improvements upon its products without any obligation to include these
changes in any products theretofore manufactured.
F. No warranty, whether expressed or implied, is given or made with respect to any accessory supplied with products described above. Except to
the extent prohibited by applicable law, all implied warranties made by American Audio® in connection with this product, including warranties of
merchantability or fitness, are limited in duration to the warranty period set forth above. And no warranties, whether expressed or implied, including
warranties of merchantability or fitness, shall apply to this product after said period has expired. The consumer’s and or Dealer’s sole remedy shall
be such repair or replacement as is expressly provided above; and under no circumstances shall American Audio® be liable for any loss or damage,
direct or consequential, arising out of the use of, or inability to use, this product.
G. This warranty is the only written warranty applicable to American Audio® products and supersedes all prior warranties and written descriptions
of warranty terms and conditions heretofore published.
American Audio® - www.americanaudio.com - VX Series™ Power Amplifier User Manual Page 16
VX Series SPECS
Power supply:
MODEL:
AC 100V, 50/60Hz (Japan)
AC 110V, 60Hz (Colombia)
AC 120V, 60Hz (U.S.A. and Canada)
AC 127V, 60Hz (Mexico)
AC 220V, 50Hz (Chile and Argentina)
AC 220V, 60Hz (Philippines and Korea)
AC 230V, 50Hz (Europe, New Zealand, South Africa, and Singapore)
AC 240V, 50Hz (Australia and U.K.)
VX1000
VX1500
VX2500
Output Power:
500W RMS per Channel @ 4 Ohms, 700W RMS per Channel @ 4 Ohms,
1kHz, 0.1% THD
1kHz, 0.1% THD
1000W RMS @ 8 Ohms,
1500W RMS @ 8 Ohms, 1kHz, o.1% THD 1kHz, 0.1% THD
(Bridge Mode, Mono)
(Bridge Mode, Mono)
330W RMS per channnel @ 8 Ohms, 450W RMS per channel @ 8 Ohms,
1kHz, 1% THD
1kHz, 1% THD
Total Harmonic
Distortion (THD):
Less Than 0.1% (20Hz - 20kHZ @
8 Ohms
Less Than 0.5% (20Hz - 20kHZ @ Less Than 0.5% (20Hz - 20kHZ @
8 Ohms 8 Ohms
Frequency
Response: (+/-0.3db, @ rated output power,
1W RMS 8 Ohms): 20Hz - 20KHz
(+/-0.3db, @ rated output power, (+/-0.3db, @ rated output power,
1W RMS 8 Ohms): 20Hz - 20KHz 1W RMS 8 Ohms): 20Hz - 20KHz
Slew Rate:
15V Per usec
15V Per usec
15V Per usec
Damping Factor @
8 Ohm:
300
300
300
Impedance:
20K Ohms Balanced
10K Ohms Unbalanced
20K Ohms Balanced
10K Ohms Unbalanced
20K Ohms Balanced
10K Ohms Unbalanced
Dimensions
(LxWxH):
16.5” x 19” x 3.5”
429 x 483 x 88mm
16.5” x 19” x 3.5”
429 x 483 x 88mm
19.5” x 19” x 3.5”
495 x 482 x 88mm
Weight:
40lbs/18.5Kgs
45lbs/18.5Kgs
52lbs/23.5Kgs
1200W RMS per Channel @ 4 Ohms,
1kHz, 0.1% THD
2800W RMS @ 8 Ohms,
1kHz, 0.1% THD
(Bridge Mode, Mono)
750W RMS per channel @ 8 Ohms,
1kHz, 1% THD
American Audio® - www.americanaudio.com - VX Series™ Power Amplifier User Manual Page 17
©American Audio®
American Audio® is part of the American DJ® Group of Companies
American DJ® World Headquarters:
6122 S. Eastern Ave. Los Angeles, CA 90040 USA
Tel: 323-582-2650 / Fax: 323-582-2610
web: www.americanaudio.com / e-mail: [email protected]
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