User's Guide for the
Bass Amplifier
Bass Amplifier
POWER
GAIN
–12dB
INPUT
MUTE
0 10
ULTRA HIGH
PEAK
BRIGHT
12345
MIDRANGE
BASSULTRA LOW
0 10 0 10
FREQUENCY
12345
TREBLE DRIVE POWER
PULL ON
ON
0 10
POWER REDUCTION
MASTER
ON
FAUL T
LIMIT
IMPORTANT SAFETY INSTRUCTIONS
SVT-8 PRO Bass Amplifier
TABLE OF CONTENTS
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
PORTABLE CART
WARNING
1. Read these instructions.
2. Keep these instructions.
3. Heed all warnings.
4. Follow all instructions.
5. Do not use this apparatus near water.
6. Clean only with a dry cloth.
7. Do not block any ventilation openings. Install in accordance with
the manufacturer’s instructions.
8. Do not install near any heat sources such as radiators, heat
registers, stoves, or other apparatus (including amplifiers) that
produce heat.
9. Do not defeat the safety purpose of the polarized or groundingtype plug. A polarized plug has two blades with one wider than the
other. A grounding-type plug has two blades and a third grounding
prong. The wide blade or the third prong are provided for your
safety. If the provided plug does not fit into your outlet, consult an
electrician for replacement of the obsolete outlet.
10.
Protect the power cord from being walked on or pinched
particularly at plugs, convenience receptacles, and the point where
they exit from the apparatus.
11.
Only use attachments/accessories specified by the
manufacturer.
12.
Use only with a cart, stand, tripod, bracket, or
table specified by the manufacturer, or sold with the
apparatus. When a cart is used, use caution when
moving the cart/apparatus combination to avoid injury
from tip-over.
13.
Unplug this apparatus during lightning storms or when unused
for long periods of time.
14.
Refer all servicing to qualified service personnel. Servicing is
required when the apparatus has been damaged in any way, such
as power-supply cord or plug is damaged, liquid has been spilled
or objects have fallen into the apparatus, the apparatus has been
exposed to rain or moisture, does not operate normally, or has
been dropped.
15.
Please keep the unit in a good ventilation environment.
16. WARNING: To reduce the risk of fire or electric shock, do not
expose this apparatus to rain or moisture. The apparatus shall not
be exposed to dripping or splashing and that objects filled with
liquids, such as vases, shall not be placed on apparatus.
17. WARNING: For the terminals marked with a symbol of “ ” may
be of sufficient magnitude to constitute a risk of electric shock. The
external wiring connected to the terminals requires installation by an
instructed person or the used of ready-made leads or cords.
18. WARNING: The appliance coupler is used as disconnect device,
the disconnect device shall remain readily operable.
19. This apparatus is for professional and commercial use only.
20. This lightning flash with arrowhead symbol within an equilateral
triangle 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.
WARNING: To reduce the risk of electric shock, do not remove cover
(or back) as there are no user-serviceable parts inside. Refer
servicing to qualified personnel.
The exclamation point within an equilateral triangle is intended to
alert the user to the presence of important operating and maintenance instructions in the literature accompanying the appliance.
21. The apparatus should be connected to a mains socket outlet
with a protective earthing connection.
22. Correct Disposal of this product: This marking indicates that
this product should not be disposed with other household wastes
throughout the EU. To prevent possible harm to the environment or
human health from uncontrolled waste disposal, recycle it.
23. No naked flame sources, such as lighted candles, should be
placed on the apparatus.
24. Attention should be drawn to environmental aspects of battery
disposal.
25. WARNING: To reduce the risk of damage, do not set the
amplifier on the feet of the rear panel. It is unstable and could easily
tip over. Use the feet on the bottom of the amplifier instead.
SVT-8 PRO Bass Amplifier
An Introduction to your new Ampeg SVT-8 PRO Bass Amplifier
The harmonically rich sound and legendary performance of the AMPEG SVT are redefined in the SVT-8 PRO.
This versatile and powerful bass amplifier delivers up to 2500 watts of unsurpassed musical power, and offers
the classic vibrancy of tubes with several outstanding features.
All of the features and controls of your SVT-8 PRO are covered in detail within the pages of this user’s
guide. We recommend that you go over them before you use the amplifier.
Features
In the world of high performance bass amps, Ampeg’s SVT amplifiers stand alone. In true Ampeg tradition, the SVT-8 PRO offers you more power, performance and flexibility than any other bass amplifier in its
class. Below are some of the outstanding features of your new amplifier - features which set it apart from
the competition!
• -12DB SWITCH: A switchable input pad which optimizes the input signal level for
use with basses with active electronics or very “hot” pickups
• MUTE SWITCH, TUNER OUT JACK: Allows you to tune your bass without hearing
it through the amplifier
• 5-POSITION ULTRA LOW SWITCH: Five different settings for the Ultra Low pro-
vide the ultimate in bottom end response
• ULTRA HIGH AND BRIGHT SWITCHES: Allows you to tailor your high frequency
response in many different ways at the touch of a button
• 5-POSITION MIDRANGE SELECTOR: Choose from the five center frequency
points available to get just the right midrange voice
• POWER REDUCTION CIRCUIT: A simulated tube power amp section allows you to
get the desired amount of “tube power amp growl” at any volume
• TRANSFORMER BALANCED LINE OUTPUT: Allows you to send a high quality
line level signal to the house mixing board, a recording console, or another amplifier - switchable for pre or post EQ with a switchable ground lift
• EFFECTS LOOP: Allows for virtually noise-free connection for use with you favorite
effects
• FOOTSWITCH CONTROL: Allows hands-free remote control over the Mute and
Power Reduction features
• CIRCUIT BREAKER PROTECTION: A heavy duty resettable circuit breaker provides protection against fault conditions
®
• SPEAKON
mission of power to your speakers
• ULTIMATE POWER: 1300 watts into 4 ohms, 2500 watts into 2 ohms
SPEAKER OUTPUT JACKS: For the ultimate connection and trans-
Speakon®is a registered trademark of Neutrik AG.
3
4
The Front Panel
SVT-8 PRO Bass Amplifier
INPUT
–12dB
MUTE
0 10
12345
PEAK
ULTRA HIGH
BRIGHT
GAIN
0 10 0 10
MIDRANGE
0 10
ON
TREBLE DRIVE POWER
POWER
MASTER
FAUL T
LIMIT
ON
POWER REDUCTION
PULL ON
BASSULTRA LOW
12345
FREQUENCY
1 3 4 9 10 12 16 1718 1913 14 155 6 112 87
1. INPUT: Connect your bass guitar here by
means of a shielded signal cable.
2. -12dB: This switch, when depressed, attenuates the input signal by 12dB. Attenuation allows
the Gain control (#4) to be used ov er a larger portion of its range. If clipping is indicated with the
Gain way down, attenuation is needed.
3. MUTE: This switch, when depressed, mutes all
output s except the Tuner Out (#24, rear panel).
This allows you to use an electronic t uner without
having to adjust any levels or turn down your
house sound. A footswitch may be used to control
the mute function as long as this switch is in the
out position.
4. GAIN: This controls the gain of the preamp.
Adjust this cont rol until the Peak LED (#5) flickers
on strong signal peaks (but is not illuminated co nstantl y while playing).
5. PEAK: This LED illuminates when the signal
level into the preamp or power amp nears clipping. Adjust the Gain control (#4) until a strong
signal from your instrument causes this LED to
flicke r with the Master control (#16) set low.
NOTE: If the LED flickers frequently with the Gain
at a low s etting, use the -12dB switch (#2) to
attenu ate the input signal and readjust the Gain.
6. ULTRA LOW: Use this five-position rotary
switch to optimize the low end response as follows:
1: Off – flat low frequency response
2: Sub Cut – reduces frequencies below the
bass range to protect your speakers
3: Low Cut Classic – provides a low cut equal
to our original SVT Cl assic amplifier
4: Ultra Low Classic – contours the sound to
emphas ize the low end just like our original
SVT amplifier
5: Ultra Low Modern – provides a substantial
low end boost
7. ULTRA HIGH: This switch, when depressed,
adds about a 16dB boost to the high frequencies
around 8kHz, depending o n the setting of the
Gain control.
8. BRIGHT: This switch, when depressed, adds a
6dB boost to the high frequencies at 3kHz.
9. BASS: Use this control to adjust the low frequency output level. This control provides +17/-13
dB at 20Hz.
10. MI DRANGE: Use this control to adjust the
midran ge frequency output. Th is control provides
+/-20d B at the frequency selected by the adjacent
Freque ncy control (#11).
11. FREQUENCY: Use this control to select the
center frequency for the Midrange control (#10)
as follows:
1: 220Hz
2: 450Hz
3: 800Hz
4: 1.6kHz
5: 3kHz
12. TREBLE: Use this control to ad just the high
freque ncy output level. This control provides +18/
-20dB at 7kHz.
13. POWER REDUCTION ON: This LED illuminates when the Power Reduction function is
active .
14. POWER REDUCTION DRIVE / PULL ON:
This control, when engaged, determines the signal level sent to the simulated tube power amp
sectio n. This control works in conjuntion with the
other preamp controls in determining how hard
the “power amp” is driven. The Power Reduction
is engaged when this control is pulled out slightly
until it clicks.
15. POWER REDUCTION POWER: T his control
sets the output level of the simulated tube power
amp section. This allows you to obtain the desired
amount of “tu be power amp growl” at any volume.
16. MASTER: Use this control to adjust the overall level of the amplifier.
17. LIMIT: The SVT-8 PRO employs an internal
limite r to help prevent overdriving the power amp.
This LED illuminates when the Limiter is activated, indicat ing that the levels are near clipping.
Reduce the Master control (#16) if this LED illuminate s continuously while playing.
18. FAULT: This LED illuminates when faulty condition s cause the amplif ier to protect its elf against
damage s. If this LED should illuminate while playing, turn the amplifier off, wait ten seconds, then
turn the amplifier back on. If the Fa ult LE D continues to illuminate refer the amplifier to a qualified
Ampeg service center.
19. POWER: Use this switch to turn the amplifier
on (top of the switch depressed) and off (bottom
of the switch depressed). The adjacent LED illuminate s when the amplifier is turned on.
5
The Rear Panel
SVT-8 PRO Bass Amplifier
20. 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!
21. BAL. OUT: This jack supplies a line level
signal for connection to a house mixing board,
recording console or external amplifier. The signal level at this jack is governed by the Post/Pre
switch (#23).
22. GND/LIFT: Use this switch to lift the ground
connection at the Bal. Out jack to help eliminate
hum in the Bal. Out signal.
23. POST/PRE: The signal at the Bal. Out jack
(#21) can be set to either Pre or Post-EQ with
this switch. With the swi
tch in the OUT position,
the signal at the jacks is Pre-EQ. This is a direct
output not affected by any EQ or boost settings.
With the switch depressed, the signal is PostEQ and is controlled and modified by the tone
controls and the effects loop.
24: TUNER OUT: This jack is provided for connection to an electronic tuner and is always
“live,” even when the Mute switch (#3) is
engaged. This allows for “silent tuning” as well
as a monitor feed which stays hot even when
the house mix is muted.
25. SPEA KERS: These output jacks supply
speaker-level power to the speaker cabinet.
The rated power output is 1300 watts rms
into 4 ohms or 2500 watts rms into 2 ohms
(minimum load).
WARNING: Use speaker cables to make
the connections. Do not use instrument
cables as they may overheat.
Pin 1+ = hot
Pin 1– = return
26. CIRCUIT BREAKER: The SVT-8 PRO
employs an AC line circuit breaker to
help protect against damages due to excessive current
demands. If the amplifier stops working, check
the circuit breaker.
27: POWER AMP IN: This jack connects an
external preamp directly to the power amp.
When using an external source, connect the
output of the source to this jack by means of a
shielded signal cable to feed the signal into the
power amp section. The internal signal is disconnected when a connector is inserted into
this jack.
28. PREAMP OUT: Use this jack to send a signal from the internal preamp to an auxiliary
power amplifier, mixing console, monitor system, or
house PA system. The signal at this
jack is post-EQ.
29. EFFECTS LOOP RETURN : When using
an external signal processor, connect the output of the device to this jack by means of a
shielded signal cable.
30. EFFECTS LOOP SEND: When using an
external signal processor, connect this jack to
the input of the device by means of a shielded
signal cable.
31. FO OTSWITCH: Connect a two-button
(ring/tip/sleeve) footswitch to this jack to control
the Power Reduction and the Mute functions.
(Mute = tip/sleeve; Power Reduction = ring/
sleeve.)
NOTE: A footswitch may be purchased at
your local Ampeg Dealer or ordered directly from
LOUD Technologies Inc. Be sure to ask for
model #AFP2.
IMPORTANT: This unit employs forced air
cooling by means of an internal fan. The
rear and side ventillation slots must remain
unobstructed when operating this amplifier.
When mounting the unit in a rack make sure
there is ample room for proper air circulation.
The rack must be constructed and positioned
in such a manner to allow proper air flow and
the exhausting of hot air away from the rack
at all times.
WAR NI NG :
Made In The U.S.A .
LOU D T E CH NOL OG IE S , INC.
100Ð240V 50/60Hz 300VA
2500W @ 2 OH MS
1300W @ 4 OH MS
CL ASS 2 WIR ING
This device c ompl ies w ith part 15 of th e FCC R ul es .
Opera tion is s ubj ect to the following two c ond ition s:
this device may n ot caus e harm ful inter fer enc e, and this
devic e must acce pt any i nterference re ce ived , in cluding
interfe renc e that may c aus e un des ire d opera tion.
26 27 28 3129 30
20 2421 2522 2 3
26 27 28 3129 30
20 2421 2522 23
W
SVT-8 PRO Bass Amplifier
Some Suggested Settings
Ampeg Rock:
Jazz:
GAIN
0 10
PEAK
WOL ARTLU SSAB
12345
ADJUST UNTIL PEAK LED FLASHES PULL - SET AS NEE DED
GAIN
0 10
PEAK
WOL ARTLU SSAB
12345
ADJUST UNTIL PEAK LED FLASHES
ULTRA HIGH
/54
BRIGHT
/54
ULTRA HIGH
).
BRIGHT
/54
MIDRANGE
0 10 0 10
MIDRANGE
0 10 0 10
FREQUENCY
12345
FREQUENCY
12345
TREBLE DRIVE POWER
0 10
TREBLE DRIVE POWER
0 10
PULL ON
ON
POWER REDUCTION
PULL ON
ON
POWER REDUCTION
Country:
GAIN
0 10
WOL ARTLU SSAB
ULTRA HIGH
/54
PEAK
12345
BRIGHT
/54
MIDRANGE
0 10 0 10
FREQUENCY
12345
TREBLE DRIVE POWER
0 10
PULL ON
ON
POWER REDUCTION
ADJUST UNTIL PEAK LED FLASHES
Funk:
GAIN
0 10
WOL ARTLU SSAB
ULTRA HIGH
).
PEAK
12345
BRIGHT
/54
MIDRANGE
0 10 0 10
FREQUENCY
12345
TREBLE DRIVE POWER
0 10
PULL ON
ON
POWER REDUCTION
ADJUST UNTIL PEAK LED FLASHES
Funk Popping:
GAIN
0 10
WOL ARTLU SSAB
ULTRA HIGH
).
PEAK
12345
BRIGHT
/54
MIDRANGE
0 10 0 10
FREQUENCY
12345
TREBLE DRIVE POWER
0 10
PULL ON
ON
POWER REDUCTION
ADJUST UNTIL PEAK LED FLASHES
Rack Mounting
When mounting the SVT-8 PRO into a rack, the four bottom feet should be removed to maintain the two 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. Additional rack ears are provided on the rear of the amplifier for connection to an additional support bracket. It is highly recommended that this additional support be used when rack mounting the amplifier.
6
7
Troubleshooting
In the unlikely event that your SVT-8 PRO 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 cure for the problem is something
quite simple.
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 for servicing if it gets dropped, has liquid spilled into it, or sustains damage to its
power cord (see page 2). Regular maintenance and cleaning should be performed on a routine basis to prolong the amplifier’s useful life.
System Block Diagram
INPUT
PAD
GAIN
MUTE
BASS
PEAK
TREBLE
ULTRA
LOW
ULTRA
HIGH
TUNER
OUTPUT
EFFECTS
LOOP
PULL
ON
PREAMP
OUT
POWER
AMP IN
SPEAKERS
MID
FREQ
MASTER
MID
MUTE
1+
2+
1- 2-
PRE
POST
DRIVE POWER
POWER
REDUCTION
GND
LIFT
TRANSFORMER
BALANCED LINE
OUTPUT
1+
2+
1-
2-
SVT-8 PRO Bass Amplifier
380W
P/N SW0875 F00 09/10
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