Ampeg SVT - User Manual

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AMPEG
SERI'ICE
MANI.'AL
SI'TAilIPLIFIER
I
I
r.
I
I
SVT AMPLIFIER
SPECIFICATIONS
Power
Output:
300
watts
RMS minimum
continuous
at
less
than
3%
total harmonic
distortion
(T.H.D.)
into
a
4
or
2
ohm
load
over the 20 to
20,000 Hertz
band
Front Panel:
Two
channels
Channel 1:
Volume
control
Treble,
midrange, bass controls
Two-position ultra-hi
switch
Three-position
ultra-lo switch
Channel
2:
Volume Control
Treble
and bass controls
Two-position ultra-hi
switch
.l
Two-position ultra-lo
switch
Hum balance control
(on
power
amp'
chassis behind
grille
cloth)
Power switch
Pilot light
Rear Panel:
Two 4
ohm
speaker
jacks
with
automatic
impedance
switching
Patching
jacks
Standby
switch
Tone
Control
Range:
Treble
-+
12 dB
@
4,000 Hertz
Bass
-+
12 dB
@
40 Hertz
Midrange
-r-
20
dB
@
22O,800
or 3.000
Hertz
Ultra-Hi
+
20 dB
@
8,000
Hertz
(dependent
on volume control
position)
Ultra-Lo
-20
dB
@
40 Hertz
Ultra-Lo
Boost
-20
dB
@
600 Hertz
Signal
to
Noise Ratio
(S/N):
-80
dB below
full
power
Frequency
Response
(1
watt):
-r-
1
dB at
20 to
20,000 Hertz
Sensitivity:
lnput
sensitivity
for channels
1
and
2
is .O19 volts
for full
power
Patching
Facilities:
Power amplifier
jack
is high impedance
with .25
volts for
3OO
watts.
Power Supply
Requirements:
Power consumption
570
watts
at
rated
output
Weight:
85
lbs.
(39
Kg.)
Dimensions:
23yB" W x 11" Hx14"
D
65 cm.
x 23
cm.
x
36 cm.
SVT SPEAKER
ENCLOSURE
SPECIFICATIONS
Power Handling:
240
watts RMS
per
enclosure
lmpedance:
4
ohms
Enclosure
Design:
Totally sealed
air suspension
(four
compartments with
two speakers
per
compartment)
Speaker
Complement:
Eight 10"
speakers
Weight:
137 lbs.
(62
Kg.)
Dimensions:
26"
W x481,/q" Hx15t/"'t
D
66
cm.
x 123
cm.
x
40.2 cm

Ampeg SVT Specifications

General

Power Output	300 watts
Driver Tubes	12AX7
Power Amp	Tubes (6 x 6550)
Type	Bass amplifier
Power Output (RMS)	300 watts
Inputs	2 x 1/4"
Outputs	1/4" and XLR
EQ	3-band
Tone Controls	Bass, Mid, Treble

Summary

SVT AMPLIFIER SPECIFICATIONS

Front Panel

Controls and switches on the front panel of the SVT amplifier.

Rear Panel

Connections and switches located on the rear panel of the SVT amplifier.

SVT SPEAKER ENCLOSURE SPECIFICATIONS

Calibration Procedure

Output Stage Bias Current Adjustment

Procedure to adjust bias current using specific test points and voltage readings.

Phase Inverter Balance Control Adjustment

Adjusting balance control using distortion meter or DC voltmeter methods.

Disassembly of SVT Head Cabinet

Back Panel Disassembly

Steps to remove the back panel of the head cabinet.

Power Chassis Removal

Steps to remove the power chassis from the head cabinet.

Pre-Amp Removal

Steps to remove the pre-amplifier from the head cabinet.

Baffle Removal

Methods for removing the baffle from older and newer models.

Model SVT Amplifier Replacement Parts List