Ampeg SVT-CL Owner's Guide

4
The Front Panel Controls and Their Use
SVT CLASSIC
Gain Bass Midrange Frequency Treble Master Standby Power
HiHi
LoLo
Ultra Hi / LoUltra Hi / Lo
–15dB15dB0dB0dB
Standby/ Standby/
Power/ Power/
FaultFault
010
5
4
3
2
1
9
8
7
6
010
5
4
3
2
1
9
8
7
6
010
5
4
3
2
1
9
8
7
6
010
5
4
3
2
1
9
8
7
6
010
5
4
3
2
1
9
8
7
6
5
4
3
1
2
CLASSIC
010
5
4
3
2
1
9
8
7
6
1 2 3 4 5 6 7 8 9 10 1211 13
1. 0dB INPUT: The signal output from an
instrument (active or passive – typically
passive) or a line level signal may be con-
nected here by means of a shielded instru-
ment cable. The signal at this jack is sent
into the preamp at full strength.
2. -15dB INPUT: The signal output from
an instrument (active or passive – typically
active) or a line level signal may be con-
nected here by means of a shielded instru-
ment cable. The signal at this jack is
padded 15dB before it is sent into the pre-
amp.
3. GAIN: This control adjusts the basic
level of signal in the preamp.
4. ULTRA HI: This switch boosts high
frequencies.
5. ULTRA LO: This switch, when
depressed, provides emphasis to the
low frequencies by boosting the low
frequencies and selectively cutting the
mid frequencies.
6. BASS: This is the primary low fre-
quency control. It allows for 12dB of
cut or boost at 40Hz.
7. MIDRANGE: This is the primary
midrange control. It allows for 20dB of
cut or 10dB of boost at the center fre-
quency selected by the Frequency
control (8).
8. FREQUENCY: Allows you to select
the center frequency for the Midrange
control (7), giving you a choice of five
“voices” for the Midrange. The numbers
correspond to the following center fre-
quencies as indicated: 1=220Hz,
2=450Hz, 3=800Hz, 4=1.6kHz, 5=3kHz.
9. TREBLE: This is the primary high
frequency control. It allows for 20dB of
cut or 15dB of boost at 4kHz.
10. MASTER: This controls the signal
level to the power amp and therefore the
overall listening level. It also controls the
level to the Preamp Out jack (20).
11. STANDBY/POWER/FAULT INDI-
CATOR LED: This is a multi-function
LED. In Standby Mode, it glows red. In
the On mode (when high voltage is
applied to the tubes) it glows green. If
it does not turn green in the On mode,
there is no high voltage present and
the unit needs servicing. If the amp
detects a fault in the power tube circuit,
the high voltage is turned off and the
LED flashes between red and green.
This usually indicates a bad power
tube. The amp will remain in this con-
dition until the unit is turned off.
12. STANDBY: The Standby mode
allows the tubes to warm up or remain
warm without high voltage being
applied to them. This extends tube life.
This switch should be OFF when first
turning the amplifier on. Allow the unit
to warm up for 20 seconds before
switching to the ON position. During
short periods of non-use, the amp
should be put into Standby mode.
13. POWER: This supplies AC power
to the unit. Turn this switch on before
turning on the Standby switch (12), as
explained above. This switch must be
turned off to reset the amp after a Fault
condition.

Ampeg SVT-CL Specifications

Power

output power rating	300 watts RMS
power requirements	115VAC, 60Hz, 460VA; 100/115VAC, 50/60Hz, 460VA; 230VAC, 50/60Hz, 460VA

Tone Control Range

bass	±12dB @ 40Hz
midrange	+10dB, -20dB @ 220, 450, 800, 1.6k or 3kHz
treble	+15dB, -20dB @ 4kHz
ultra low	+2dB @ 40Hz, -10dB @ 500Hz
ultra high	+9dB @ 8kHz

System Specifications

total system gain	67dB @ 1kHz
signal to noise ratio	80dB typical
tube complement	12AX7 (3), 12AU7 (2), 6550 (6)

Weight and Dimensions

size (W x H x D)	24” W x 11.5” H x 13” D
weight	80 lbs