Ampeg B5R Musical Instrument Amplifier User Manual

Owner’s Guide
for the
B5R
Bass Amplifier
Made in the U.S.A. by
B5R Bass Amplifier
TABLE OF CONTENTS
Important Safeguards and Precautions . . . . . . . . . . . . . . .2
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
The Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
The Rear Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Some Suggested Settings . . . . . . . . . . . . . . . . . . . . . . . . .6
Rack Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
System Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . .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.
• Whenever using tall or stacked speaker cabinets, use them ONLY on a level surface. NEVER set tall or stacked
cabinets on a surface with more than a five degree incline since tipping or falling could occur, possibly causing serious injuries.
• 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, lint-free 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! See the
chart below.
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:
WARNING: 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.
CAUTION: 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. 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.
EXPLANATION OF
GRAPHICAL SYMBOLS:
2
"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"
B5R Bass Amplifier
An Introduction to your new Ampeg B5R Bass Amplifier:
Thank you for making one of the best choices you will ever make for your musical career – choosing one
of the finest bass amps available, the Ampeg B5R. This versatile and powerful bass amplifier delivers up
to 675 watts of unsurpassed musical power, and offers several outstanding features.
All of the features and controls of your B5R are covered in detail within the pages of this owner’s guide.
We recommend going over them before you use the amplifier.
Features:
In the world of high performance bass amps, Ampeg amplifiers stand alone. In true Ampeg tradition, the
B5R offers you more power, performance and flexibility than any other bass amplifier in its class. The outstanding features of your new amplifier, features which set it apart from the competition, are listed below.
• TWO SEPARATE CHANNELS: Clean and Overdrive, with the ability to combine the
two for a unique sound and added versatility
• TWO 5-POSITION STYLE CONTROLS: Take your pick from five different tone variations to best suit your playing style
• OCTAVE CIRCUIT: Adds another signal to the input signal, one octave lower than the
original
• FX BLEND: Varies the amount of external effects mixed into the signal
• TUNER OUT JACK: Allows connection to an electronic tuner and provides an “always
live” monitor feed even when the other outputs are muted
• HEAVY-DUTY SPEAKER JACKS: A Speakon® jack is provided for a more reliable
connection at higher outputs, as well as a pair of 1/4” jacks
• TRANSFORMER BALANCED/UNBALANCED LINE OUTPUTS: Balanced XLR and
1/4” line output jacks
• EFFECTS LOOP: Connect your effects here for increased intensity and quieter operation
• POWER AMP IN/PREAMP OUT: A separate preamp may be connected to the Power
Amp In jack, and the Preamp Out jack may be connected to a slave amp, or use as a
patch point for active devices such as compressors, EQs, etc.
• FOOTSWITCH CONTROL: Use footswitches to control channel selection, the octave
circuit, and the channel combine feature
• CIRCUIT BREAKER PROTECTION: A heavy duty, resettable circuit breaker provides
protection against fault conditions
• BUILT-IN NOISE GATE: A preset internal noise gate helps keep the Overdrive channel quiet while no signal is present
Speakon® is a registered trademark of Neutrik AG.
3
B5R Bass Amplifier
The Front Panel:
1 2
3 4
5
6
7
8
9
10 11 12
1. 0dB INPUT: The signal output from an instrument (active or passive – typically passive) or a line level signal may be connected here
by means of a shielded instrument cable. The signal at this jack is
sent into the preamp at full amplitude.
2. -15dB INPUT: The signal output from an instrument (active or passive – typically active) or a line level signal may be connected here
by means of a shielded instrument cable. The signal at this jack is
reduced 15dB before it is sent into the preamp.
3. MUTE: This switch, when depressed, mutes all outputs except the
Tuner Out (28). This is excellent for tuning your bass with an electronic tuner without having to adjust any levels or turn down your
stage volume.
4. COMBINE: This switch, when depressed, allows the clean channel to remain active when the overdrive channel is selected, combining the two channels to create a different-sounding “third channel.”
CLEAN CHANNEL:
5. VOLUME: This control adjusts the output level for the clean channel and the input to the Octave circuit (16). Adjust this control no higher than that which causes the Peak/Mute LED (6) to flash on strong
signal peaks.
6. PEAK/MUTE LED: This LED flashes when the signal level in the
preamp approaches clipping. When the Mute switch (3) is depressed,
this LED remains illuminated until the Mute is turned off.
7. STYLE: This five-position switch allows you to vary the tone of the
clean channel. The following table lists each of the different settings
– experiment with the Style and other EQ controls for the results
which suit you best.
POSITION 1:
POSITION 2:
POSITION 3:
POSITION 4:
POSITION 5:
Fully “scooped” mids (mid cut)
Traditional passive tone setting
Basically flat
Boosted high end
Basically flat with low end roll-off – for
loud playing without “muddiness”
8. BASS: This is the primary low frequency control which has a range
of 22dB @ 50Hz.
9. ULTRA MID: This is the primary midrange control which has a
range of 13dB @ 250Hz.
10. TREBLE: This is the primary high frequency control which has a
range of 22dB @ 8kHz.
4
13
14
15
16
17
18
19
20
11. CHANNEL SELECT: This switch selects the clean channel in the
out position and the overdrive channel when depressed.
OVERDRIVE CHANNEL:
12. OD BOOST: This switch, when depressed, adds gain and tone
shaping to the overdrive channel signal for heavy overdrive.
13. GAIN: This control sets the level of the signal entering the preamp stage.
14. STYLE: This five-position switch allows you to vary the tone of the
overdrive channel. The following table lists each of the different settings – experiment with the Style control for the results which suit you
best.
POSITION 1:
POSITION 2:
POSITION 3:
POSITION 4:
POSITION 5:
Mid cut – for clean to semi-overdriven sound
Slight mid cut
Basically flat
High end roll-off
Large mid peak tailored for heavily overdriven
sound combined with the clean channel
15. VOLUME: This control adjusts the output level for the overdrive
channel.
16. OCTAVE VOLUME: This control adjusts the output level for an
added signal which is one octave lower than the instrument’s original
signal. This signal is dependent on the clean channel’s Volume control (5) and can be switched by the Octave footswitch (31). The effectiveness of this signal depends on playing style, pickup selection, and
neck position.
17. FX BLEND: This control varies the mix between the direct (dry)
signal and the effects (wet) when the effects loop (26,27) is used. Full
counterclockwise results in all direct signal (no effect) and full clockwise gives all effect and no direct signal. The clockwise position is
equivalent to a series effects loop and should be used with such
devices as limiters and equalizers.
18. MASTER: This control sets the overall output level of the amplifier.
19. OD/CLEAN LEDS: The red LED (“OD,” upper) illuminates when
the overdrive channel is selected, while the green LED (“CLEAN,”
lower) illuminates when the clean channel is selected.
20. POWER: This heavy-duty rocker switch applies AC power to the
amplifier. The amp is ON when the top of the switch is depressed,
OFF when the bottom of the switch is depressed.
B5R Bass Amplifier
The Rear Panel:
21
22
24
23
25
29
26
27
28
30
31
32
21. CIRCUIT BREAKER: The B5R employs an AC line circuit
breaker to help protect against damage due to excessive current
demands. If the amplifier stops working, check the circuit breaker. If it has opened, the button will be protruding and showing a
contrasting color. You can reset the circuit breaker by pushing it
in until it latches. The breaker must cool down for a short time
before the button will latch. If the circuit breaker opens repeatedly, have the amplifier checked by a qualified service person.
27. EFFECTS LOOP SEND: When using an external signal
processor, connect this jack to the input of the effect by means of
a shielded instrument cable.
22. AC LINE IN: Firmly insert the supplied AC power cord into
this socket until it is fully seated. Plug the male end of the cord
into a grounded AC outlet. DO NOT DEFEAT THE GROUND
PRONG OF THE AC PLUG!
29. POWER AMP INPUT: This jack connects directly to the
power amp for use with an external preamp. When using an
external source, connect the OUTPUT of the source to this jack
by means of a shielded instrument cable to feed the signal into
the power amp section. The internal signal is disconnected when
a plug is inserted.
23. SPEAKER OUTPUTS: The 1/4” jacks offer a convenient
method of connecting to speaker cabinets using cables terminated with 1/4” plugs. However, when using the amplifier at or near
its full output power, using the Speakon® jack is recommended.
24,25. TRANSFORMER BAL. LINE OUT: These jacks supply a
pre-Master, line level signal for connection to a house mixing
board, recording console or external amplifier(s). The 1/4” jack
(24) provides a balanced or an unbalanced signal (depending on
the signal cable used); the XLR-type jack (25) provides a balanced signal.
26. EFFECTS LOOP RETURN: When using external effects,
connect the effect’s output into this jack by means of a shielded
instrument cable.
28. TUNER OUT: This jack is provided for connection to an electronic tuner and is always “live,” even when the Mute switch (3)
is engaged, allowing for “silent tuning” as well as a monitor feed
which remains active when the other outputs are muted.
30. PREAMP OUTPUT: This jack is a direct preamp output for
use with an external power amplifier, mixing board, external
effects, etc. Connect the external unit input to this jack by means
of a shielded instrument cable. Using this output does not break
the connection to the internal power amplifier.
31. OCTAVE/COMBINE FOOTSWITCH: Connect a two button
footswitch to this jack for remote control of the Octave and
Combine features. The tip connection controls the Octave feature and the ring connection controls the Combine feature.
32. CHANNEL FOOTSWITCH: Connect a single button
footswitch to this jack for remote channel selection.
Speakon® is a registered trademark of Neutrik AG.
5
B5R Bass Amplifier
Some Suggested Settings
SVT:
Since so many variables affect
the actual sound of any system,
the following settings are
offered as starting points to
help you find the exact sounds
your playing demands. When
using the B5R, please keep in
mind the following points:
OUT
OUT
FUNK:
•The Volume and Gain controls
are used together to set the
relative levels of each channel
and the octave signal.
•The Master control should be
set to produce the appropriate
output volume level.
SVT OVERDRIVEN:
OUT
ALTERNATIVE CLEAN:
OUT
LOUD CLEAN ROCK:
OUT
HARD-DRIVEN ROCK:
OUT
LAYERED BASS W/GUITAR MIX:
IN
IN
OUT
POWER TRIO:
IN
IN
IN
Rack Mounting
When mounting the amplifier into a rack, the four bottom feet should be removed to maintain the three rack space height of the amplifier. Be sure to keep the feet and their attachment bolts for future use. If the feet are reinstalled, never use screws which will protrude
farther into the amplifier than the original hardware.
The rack must be a high quality enclosure capable of securely supporting the weight of the amplifier. Tighten the mounting screws
securely through the amplifier’s face plate, into the rack rails. Check the rack and mounting screws occasionally to ensure a continually safe and secure installation.
6
B5R Bass Amplifier
Troubleshooting
In the unlikely event that your B5R should malfunction, take a few minutes to troubleshoot it before you call for service. You can save yourself time and money by doing it yourself, and often the problem is something quite simple.
NO SOUND
POOR SOUND
LEDs LIGHT
LEDs DON'T LIGHT
Check bass, cables
Check amp controls, check
for signal from bass
Check AC outlet
POOR SOUND
OUTLET OK NO POWER
Check speaker(s)
NO SOUND
SOUND OK
SOUND OK
Check power cord,
fuse, power switch
Listen for hum
NO HUM
HUM
Check speaker
Unplug bass,
touch tip of cable
Check house fusebox
or circuit breaker
SPEAKER(S) OK,
POOR SOUND
SPEAKER(S)
DEFECTIVE
OK
Replace speaker(s)
POOR SOUND
SOUND OK
Speaker OK
NO CHANGE
SOUND OK
Replace cable
NO CHANGE
SEE BELOW
SEE BELOW
If the problem isn’t covered above, or if the steps lead you here, then contact your Ampeg dealer for service information. Also, you should refer your amp to an authorized service center if it gets dropped, has liquid spilled into it, or sustains
damage to its power cord (see page 2).
System Block Diagram
PEAK
EFFECTS
SEND
TONE CIRCUITS
0dB
INPUT
VOLUME
EFFECTS
RETURN
BAL.
OUTS
BASS ULTRA MID TREBLE
-15dB
INPUT
FX
BLEND
STYLE
PREAMP
OUT
SWITCHING
CIRCUIT
TONE
MASTER
VOLUME
BOOST
PWR AMP
IN
GAIN
1+
STYLE
1–
2–
2+
OCTAVE
CIRCUIT
SPEAKER
OUTS
LIMITER
PWR
AMP
OCTAVE
FOOT
SWITCHES
CHANNEL
MUTE
COMBINE
7
B5R Bass Amplifier
Technical Specifications
OUTPUT POWER RATING
675 Watts @ 2 Ohms (500 Watts Continuous)
380 Watts @ 4 Ohms (310 Watts Continuous)
220 Watts @ 8 Ohms (180 Watts Continuous)
TONE CONTROL RANGE
Bass: 22dB range @ 50Hz
Ultra Mid: 13dB range @250Hz
Treble: 22dB range @ 8kHz
SIGNAL TO NOISE RATIO
75dB typical
FOOTSWITCH JACKS
A: Channel Switch; B: Octave (Tip), Channel Combine (Ring)
POWER REQUIREMENTS
Domestic: 120VAC, 60Hz, 545VA
Export: 100-120VAC 50/60Hz, 545VA
220-240VAC, 50/60Hz, 545VA
SIZE AND WEIGHT
19/17.4”W x 3.8”H (with feet) x 15.5”D; 32 lbs
Ampeg reserves the right to change specifications without notice.
www.ampeg.com
Ampeg is proudly Made in America. ©2000 SLM Electronics, 1400 Ferguson Avenue, St. Louis, MO 63133 U.S.A.
P/N 47-043-01 . 05/00