Ampeg SVP-1500 Car Amplifier User Manual

Owner’s Guide
for the
SVP-1500 Rack Mount
Bass Power Amplifier
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10
A
M
P
SIGNAL
LIMIT
PROTECT
SIGNAL
LIMIT
PROTECT
RESET
Made in the
U.S.A.
by
SVP-1500 Bass Amplifier
Table of Contents
Important Safeguards and Precautions . . . . . . . . . . . .2
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
System Block Diagram . . . . . . . . . . . . . . . . . . . . . . . .3
The Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
The Rear Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Operation
Stereo/Bridged Mono/Parallel Mono Modes . . . . .6
Input/Output Connectors . . . . . . . . . . . . . . . . . . .6
Installations
Stereo . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Bridged Mono . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Biamp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Technical Specifications . . . . . . . . . . . . . . . .back cover
Important Safeguards and Precautions
All Ampeg products are designed for continuous safe operation, as long as common sense is used and steps are taken to help
avoid certain problems. Abiding by the following rules can help prevent damage to your amplifier, yourself and others.
• The amplifier is equipped with a three-pronged AC power cord. To reduce the risk of electrical shock, NEVER remove or otherwise attempt to defeat the ground pin of the power cord.
• Connect the amplifier ONLY to a properly grounded AC outlet of the proper voltage for your amp.
• Avoid sudden temperature extremes, rain and moisture. Also, avoid sudden and intense impact. (If the unit has been subjected
to any of the preceding abuses, have it looked at by an authorized service center.)
• NEVER set the amplifier on a support that might give out under its weight.
• Always keep the total speaker impedance at or above the rated load.
• Unplug the amplifier before cleaning it. NEVER spray liquid cleaners onto the amplifier. Wipe it with a slightly dampened, lintfree cloth to remove dirt and film.
• Don’t use the amplifier if it has sustained damage to the chassis, controls, or power cord. Refer the unit to an authorized service center for inspection.
• Amplifiers capable of producing high volume levels are also capable of inflicting permanent hearing loss or damage, if the exposure to such levels is prolonged. Such damage is progressive and irreversible!
The chart below shows the U.S. Government Occupational Safety and Health Administration (OSHA) regulations which were in effect
at the time of this publication for permissible noise exposure, per 29CRF1910, Table G-16.
SOUND LEVEL dBA
SLOW RESPONSE
DURATION PER DAY
IN HOURS
SOUND LEVEL dBA
SLOW RESPONSE
DURATION PER DAY
IN HOURS
90
92
95
97
100
8
6
4
3
2
102
105
110
115
1-1/2
1
1/2
1/4 or less
According to OSHA, any exposure in excess of those listed above could result in some hearing loss.
CAUTION
ATTENTION
VORSICHT
RISK OF ELECTRIC SHOCK
DO NOT OPEN
RISQUE D'ELECTROCUTION
NE PAS OUVRIR
ELEKTRISCHE SCHLAGGEFAHR
NICHT OFFENEN
CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK,
DO NOT REMOVE COVER.
NO USER-SERVICEABLE PARTS INSIDE.
REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.
ATTENTION: POUR REDUIRE D'ELECTROCUTION NE PAS
ENLEVER LE COUVERCLE. AUCUNE PIECE INTERNE N'EST REPRABLE
PAR L'UTILISATEUR. POUR TOUTE REPARATION, S'ADRESSER A UN
TECHNICIEN QUALIFIE.
VORSICHT: ZUR MINIMIERUNG ELEKTRISCHER SCHLAGGEFAHR NICHT
DEN DECKEL ABENHMEN. INTERNE TEILE KONNEN NICHT VOM
BENUTZER GEWARTET WERDEN. DIE WARTUNG IS QUALIFIZIERTEM
WARTUNGSPERSONAL ZU UBERLASSEN.
THIS EQUIPMENT HAS BEEN DESIGNED AND ENGINEERED TO PROVIDE SAFE AND RELIABLE OPERATION. IN ORDER TO PROLONG THE
LIFE OF THE UNIT AND PREVENT ACCIDENTAL DAMAGES OR INJURY, PLEASE FOLLOW THESE PRECAUTIONARY GUIDELINES:
CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT OPEN CHASSIS; DO NOT DEFEAT OR REMOVE THE GROUND PIN OF THE
POWER CORD; CONNECT ONLY TO A PROPERLY GROUNDED AC POWER OUTLET.
WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE.
CAUTION: NO USER-SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.
CAUTION: OUR AMPLIFIERS ARE CAPABLE OF PRODUCING HIGH SOUND PRESSURE LEVELS. CONTINUED EXPOSURE TO HIGH SOUND
PRESSURE LEVELS CAN CAUSE PERMANENT HEARING IMPAIRMENT OR LOSS. USER CAUTION IS ADVISED AND EAR PROTECTION IS RECOMMENDED IF UNIT IS OPERATED AT HIGH VOLUME.
2
EXPLANATION OF
GRAPHICAL SYMBOLS:
"DANGEROUS VOLTAGE"
= "DANGER HAUTE TENSION"
"GEFAHLICHE SPANNUNG"
"IT IS NECESSARY FOR THE USER TO REFER TO THE INSTRUCTION MANUAL"
= "REFERREZ-VOUS AU MANUAL D'UTILISATION"
"UNBEDINGT IN DER BEDIENUNGSANLEITUNG NACHSCHLAGEN"
SVP-1500 Bass Amplifier
An Introduction to your new Ampeg SVP-1500 Rack Mount Bass Amplifier
First of all, thank you for choosing one of the finest rack mount bass amplifiers available, the Ampeg SVP-1500.
Your new bass amp offers you many outstanding features, such as a rated output of up to 780 watts per channel into
2 ohms, forced fan cooling and a highly-advanced, built-in protection circuit.
In order to achieve the highest performance and longest life from your new bass amp, please read this owner’s
guide prior to its use.
Features
In true Ampeg tradition, your new SVP-1500 offers you more power, performance and ease of operation than any
other bass amp in its class. Below are some of the outstanding features of your new amplifier – features which set it
apart from the competition!
• RUGGED AND PORTABLE: Ampeg’s legendary reliability and three-rack-space design fit into most
any audio reinforcement system.
• BALANCED INPUT JACKS: Balanced 1/4” phone jacks for use with high or low impedance signals.
• BUILT-IN LIMITING AND PROTECTION CIRCUITRY: Automatic protection against clipping, overload conditions, short circuits and overheating.
• DUAL OUTPUT JACKS: 1/4” phone and Speakon® jacks for connecting your speakers.
*NOTE: 1/4” jacks not available in some areas.
System Block Diagram
A INPUTS
SIGNAL
FAULT
A OUTPUTS
A SENSITIVITY
1+
LIMITER
POWER
AMP
1-
22+
SPEAKON®
JACK
(A)
LIMIT
PROTECTION
1+
STEREO
1-
MONO
BRIDGE
SIGNAL
B INPUTS
22+
FAULT
SPEAKON®
JACK
(MONO
BRIDGE/
BIAMP)
B OUTPUTS
B SENSITIVITY
LIMITER
POWER
AMP
1+
1-
22+
LIMIT
SPEAKON®
JACK
(B)
PROTECTION
3
SVP-1500 Bass Amplifier
The Front Panel
1
7
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SIGNAL
LIMIT
PROTECT
2
3
4
1: FRONT PANEL EXHAUST VENT:
The SVP-1500 employs a variablespeed internal cooling fan to draw air
through the unit to keep it running cool
even under extreme operating conditions. The air is drawn in through the
unit's rear intake vent (#11) and is
forced out through the front panel
exhaust vent. This method of cooling
draws air out from the interior of the
rack and provides more efficient cooling than methods which bring air in
from the front and exhaust it through
the back. Keep this vent clear and
free from obstruction at all times to
insure proper cooling.
2: SIGNAL INDICATOR LED: This
LED will illuminate when signal is
detected at the amplifier's output terminals, providing accurate visual confirmation of signal presence, often
helpful in hookup and troubleshooting.
The level of the signal must be at
about 5% of the amplifier's full rated
output to make the LED glow.
3: LIMIT INDICATOR LED: The
SVP-1500 employs an internal
"Automatic" limit circuit to prevent
amplifier "clipping". The Limit LED will
illuminate whenever the input signal
attempts to overdrive the amplifier's
output section, indicating that the
Limiter has been called upon to prevent clipping. (Not only does clipping
4
SIGNAL
2
LIMIT
PROTECT
3
4
produce harsh sounding distortion, it
is also capable of damaging speaker
components - particularly high frequency drivers.) Periodic flashing of
the Limit LED indicates operation at or
near full output and is no cause for
alarm. Steady illumination of the LED
indicates constant operation of the
Limiter, with the possibility that the
input signal should be reduced by
means of the Sensitivity control (#13).
The Limiter within the SVP-1500 is
fully automatic, with no defeat switch,
insuring complete protection against
clipping at all times.
4: PROTECT INDICATOR LED: This
LED will illuminate whenever the internal protection relay on either channel is
activated, indicating the possibility of
overheating, DC voltage at the outputs,
overloads or short circuits. The protection relay is activated for a short period
upon initial turn-on and at turn-off to
prevent transient "spikes" from being
reproduced through your speakers. If
the limit and protect indicators for a
channel cycle on and off with a signal
applied, this indicates the presence of
a short circuit or load impedance less
than 2 ohms on the output of that channel (less than 4 ohms in the bridged
mono mode). In this case, check all
wiring for shorts, check the total connected load impedance to be sure it is
10
A
M
P
RESET
5
6
not below the amplifier ratings, or
check for other potential problems.
5: POWER INDICATOR LED: This
LED will illuminate when AC power is
applied by means of the Power switch
(#7). If the LED fails to illuminate,
check the AC outlet or the circuit
breaker on the front panel (#6).
6: RESET SWITCH: The SVP-1500
employs an AC line circuit breaker to
help protect against damages due to
excessive current demands. If the
amplifier does not function, check the
circuit breaker. If it has opened, the
button will be protruding and showing
a contrasting color. You may reset it
by pressing the button in until it latches. The circuit breaker must cool
down for a short time before the button will latch. If the circuit breaker
opens repeatedly with no signal input,
have the amplifier checked by a qualified service person.
7: POWER SWITCH: This switch
turns the amplifier On in the Up position and Off in the down position.
When AC power is applied to the
amplifier, the Power LED indicator
(#5) will illuminate.
SVP-1500 Bass Amplifier
The Rear Panel
8
9
9
9
11
MODEL:
SERIAL:
LINE:
WATTS:
SVP-1500
SVP15OOU12B
120 V ~ 60
Hz
1500 MAX
STEREO
MONO
MODE
10
8: POWER CORD: This heavy duty
power cord must be connected to a
grounded AC outlet of the proper voltage for the amplifier to operate. IN
ORDER TO AVOID THE POSSIBILITY OF ELECTRIC SHOCK, DO NOT
REMOVE
OR
BYPASS
THE
GROUND PRONG OF THE POWER
CORD.
9: SPEAKON® JACKS: These heavyduty output jacks offer an excellent
method of connecting the amplifier to
your speakers using cables terminated with Speakon® type plugs. Use of
these connectors is highly recommended under high power operation.
When using the amplifier in the Mono
Mode, you MUST use the middle
Speakon® jack. Please refer to pages
6 and 7 for more information.
10
12
11: FAN INTAKE AREA: The internal
cooling fan is mounted directly behind
this cover, drawing cooling air into the
amplifier to help prevent it from running hot. This area must be kept free
from obstruction! Check the Intake
Area periodically and remove any foreign materials if needed.
12: 1/4" PHONE JACK INPUTS:
These jacks accept line level signal
sources by means of cables fitted with
standard 1/4" phone plugs. Low
impedance balanced or unbalanced,
as well as high impedance sources,
are acceptable for these inputs. Low
impedance balanced inputs are to be
wired as follows:
Tip: Signal +
Ring: Signal -
10: 1/4" PHONE JACK OUTPUTS:
These additional output jacks offer an
alternative method of connecting to
your speakers, using cables terminated with 1/4" phone plugs. Since these
jacks are not as well suited to high
current applications as the Speakon®
jacks, they are NOT recommended for
extended use at high power levels, or
when driving 2 or 4 ohm loads.
The input channel circuitry is transformerless electronically balanced,
and requires a line level signal of 1.5V
RMS or greater to drive the amplifier
to full output.
NOTE: In some areas 1/4” jacks are not
acceptable for use on amplifiers capable of high output power levels. For
this reason the 1/4” jacks on your
amplifier may be sealed – use ONLY the
Speakon® jacks for connecting your
speakers.
13: LEVEL CONTROLS: These
rotary potentiometers control the level
or gain of each channel, with the fullyclockwise position of each providing
maximum sensitivity. Normal calibration of the SVP-1500 to a mixer would
Sleeve: Ground
13 14 13
12
cause the Limit LED to flash at the
same time that the mixer's VU meters
indicate full output, or "OVU."
In the Mono Mode, use the Channel A
Level control.
14: MONO / STEREO MODE SWITCH:
This push/push switch selects the
operating mode of the amplifier. In the
"out" position the amplifier is in the
Stereo Mode; with the switch in the
"in" position the amplifier is in the
Mono Mode. In the Mono Mode,
Channel A functions as the input
channel; Channel B inputs will be disconnected.
NOTE: Caution should be exercised! Improper hookup or misuse of the Mode switch could
cause damage to speakers. See
the specific hookup configurations on pages 6 and 7.
In the Mono Mode, use the Channel A
input jack.
5
SVP-1500 Bass Amplifier
Operation
Stereo Mode:
The SVP-1500 can be used in the Stereo Mode as two separate amplifier units, each capable of driving loads down
to 2 ohms. Each channel operates independently and has its own input connectors, sensitivity level controls, signal indicator LEDS, automatic limiter, fault protection circuitry, power amp, and speaker outputs. In the Stereo
Mode, the Mono/Stereo switch (#14 on the rear panel) must be in the OUT position.
Connections to your speakers can be made with either the 1/4” jacks* or the Channel A and B Speakon® jacks (or
both since they are wired in parallel). See the illustration labeled “Stereo Operation” on the facing page.
Bridged Mono Mode:
The two power amplifiers can be bridged together to form a single, higher-powered amp. In the Bridged Mono
Mode, the amplifier uses Channel A's input jacks and Sensitivity control; Channel B's are disconnected. Channel
B's power amp receives its signal from a tap after Channel A's Sensitivity control, but prior to Channel B's Limiter,
so each channel is independently protected. To select the Mono Mode, the Mono/Stereo switch (#14 on the rear
panel) must be in the IN position. Because both channels are being used (bridged in series), the minimum speaker load impedance must be 4 ohms.
Connections to your speakers must be made with the Mono Bridge (middle) Speakon® jack. See the illustration
labeled “Bridged Mono Mode Operation” on the facing page.
Biamp Mode:
The SVP-1500 can be used to separately power the lows and highs of a cabinet with biamp inputs or a separate
low and high frequency cabinet. For Biamp Operation, the Mono/Stereo switch (#14 on the rear panel) must be in
the OUT (stereo) position. Connections to your speakers can be made with either the 1/4” jacks* of the Mono Bridge
(middle) Speakon® jack. We suggest using Channel A for the low frequencies and Channel B for the highs.
When using a single cabinet with a Speakon® Biamp Input jack, terminate the end of the speaker cable going to
the cabinet with a single Speakon® connector. (Wire the connector according to the pinouts on the cabinet’s input
jackplate label or in its owners manual). If the cabinet has 1/4” Biamp Low and Biamp High Input jacks, or when
using separate cabinets for lows and highs, the end of the speaker cable going to the cabinet must be terminated
with two 1/4” connectors – one for the highs, one for the lows. (A pigtail connector and/or other adapters may be
used to split the low and high speaker wires going to the cabinets.) See the illustration labeled “Stereo Operation”
on the facing page.
Input Connectors:
The SVP-1500 uses balanced 1/4" phone jacks as input connectors. These inputs accept High or Low impedance
and balanced or unbalanced signals. A "stereo" 1/4" plug (ring/tip/sleeve) must be used to feed a high impedance
balanced signal into the amplifier. In the Mono Mode, Channel A’s input jack is used; Channel B's input jack is disconnected.
Speaker Output Connectors:
Each channel of the SVP-1500 has both a 1/4" phone jack* and a Speakon® jack. A third Speakon® jack is provided for Mono Bridged use. The Speakon® jacks are more reliable for extended use at high power levels, and their
use is always recommended over the 1/4” phone jacks.
On each channel, the Channel A and B Speakon® jacks are wired in parallel with the 1/4" phone jacks: the tip of
the 1/4" jack is connected to pin 1+ of the Speakon® jack and the sleeve is connected to pin 1–. Use of both the
1/4" jack and the Speakon® jacks simultaneously to connect two cabinets in parallel is possible, providing proper
polarity is observed.
The SVP-1500’s Mono Bridge (middle) Speakon® jack is wired as follows: Pins 1+ and 1– = Channel B+ and –
respectively; pins 2+ and 2– = Channel A + and – respectively.
*NOTE: 1/4” jacks not available in some areas.
6
SVP-1500 Bass Amplifier
Installations
Stereo Operation:
MODEL: SVP-1500
SERIAL: SVP15OOU12B
LINE: 120 V ~ 60
Hz
WATTS: 1500 MAX
Right
Cabinet
Left
Cabinet
STEREO
MONO
MODE
OUT
(STEREO)
From Speakon® Jacks
From
Preamp's
Right Out
From
Preamp's
Left Out
From 1/4" Jacks*
Bridged Mono Mode Operation:
High Power
Cabinet
MODEL: SVP-1500
SERIAL: SVP15OOU12B
LINE: 120 V ~ 60
Hz
WATTS: 1500 MAX
STEREO
MONO
MODE
IN
(MONO)
From
Preamp's
Main Out
From Bridged Mono/Biamp Speakon® Jack
WARNING! Due to higher
power output per speaker,
use caution in setting levels.
Biamp Operation:
Biamp Cabinet or
Low and High Cabinets**
MODEL: SVP-1500
SERIAL: SVP15OOU12B
LINE: 120 V ~ 60
Hz
WATTS: 1500 MAX
**May
require
pigtail
connectors
or other
adapters –
see
cabinet(s)
for pin
configurations
and other
considerations.
HF
Cab
STEREO
MONO
MODE
OUT
From Bridged Mono/Biamp Speakon® Jack
From (STEREO) From
Crossover's
Crossover's
HIGH OUT
LOW OUT
To Biamp Input
Speakon® Jack
IN
LF
Cab
To HIGH IN/HF cabinet
To LOW IN/LF cabinet
From CH.B
1/4" jack*
From CH.A 1/4" jack*
IN
PINS 2+,2–
PINS 1+,1–
From Amp's
Bridged Mono/
Biamp Jack
*NOTE: 1/4" jacks not available in some areas.
7
SVP-1500 Bass Amplifier
Technical Specifications
POWER OUTPUTS (per channel, stereo mode)1,2
8 ohms:
4 ohms:
2 ohms:
2 ch (20-20kHz) 2 ch 1kHz
230 watts
260 watts
425 watts
560 watts
2 ch 40Hz (1 cycle)
280 watts
480 watts
780 watts
1 ch 1 kHz
295 watts
500 watts
750 watts
1 ch 40Hz (1 cycle)
300 watts
550 watts
900 watts
POWER OUTPUTS (mono mode)1,2
16 ohms:
8 ohms:
4 ohms:
20-20kHz
460 watts
1kHz
520 watts
850 watts
1120 watts
FREQUENCY RESPONSE
40Hz (1 cycle)
560 watts
960 watts
1560 watts
+0, -.8dB / 20Hz - 20kHz @ 230 W / channel @ 8 ohms
TOTAL HARMONIC DISTORTION Less than .25%, 20Hz - 20kHz @230 W / channel @ 8 ohms
SLEW RATE1
30 volts / microsecond (stereo mode), 60 volts / microsecond (mono mode)
SIGNAL TO NOISE RATIO1,2
Greater than -100dB from 230 watts / 8 ohms
INPUT TYPE AND IMPEDANCE
Transformerless electronically balanced, 20K actual load impedance. Suitable for Low or
High-Z balanced line. One (1) 1/4” phone jack per channel.
INPUT SENSITIVITY
1.5 V RMS for 230 Watts / 8 ohms
LOAD IMPEDANCE
Stereo Mode: 2 ohms or greater; Bridged Mono Mode: 4 ohms or greater
DAMPING FACTOR1
Typical 250 (1kHz, 8 ohms)
OUTPUT CONNECTIONS
1/4” phone jack*, plus Speakon® jacks each channel; Speakon® jack for Mono Bridge/Biamp
PROTECTION CIRCUITRY
Short circuit, RF burnout, overtemp, turn on/off transient and DC protection, Speaker protection
relays, built-in auto limiter (Anti-clip)
COOLING
Forced air fan cooling, rear intake, front exhaust
POWER REQUIREMENTS
115VAC 60Hz, 880VA
100/110VAC 50/60Hz, 880VA
230VAC, 50/60Hz, 880VA
CIRCUIT BREAKER
10 amp (mains)
SIZE AND WEIGHT
19” W x 5.25” H x 12.5” D; 33 lbs. 483mm x 133mm x 317mm; 15Kg.
typical performance
1
@115 VAC 60Hz
2
*NOTE: 1/4” jacks not available in some areas.
Ampeg reserves the right to change specifications without notice.
Ampeg is proudly Made in America. ©1996 SLM Electronics, 1400 Ferguson Avenue, St. Louis, MO 63133 U.S.A.
P/N 47-655-12 . 03/97