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14. AC LINE IN: Firmly plug the
supplied AC power cord into this
socket, pushing it in 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!
15. FUSE: This protects the unit
from damage due to overload con-
ditions or power line surges. If the
fuse blows, replace it only with the
same size and type.
16. POLARITY: Place this switch
in the position that provides the
least electrical buzz from the unit.
17. BIAS SECTION: These two
controls and sets of LEDs allow the
user to properly bias the power
amp. See “Setting Tube Bias” on
page 7 for a complete description
of how to use this section.
18. SLAVE OUT: This jack
receives the same signal that is
being sent to the power amp. It is
useful for powering another amp
(slave) from this unit’s preamp.
19. BALANCED OUT: This XLR-
type jack is the output at the power
amp in. Thus, it will include any
processing done in the Preamp
Out/Power Amp loop (16, 17). This
signal can be used to feed an
external power amplifier, mixing
console or house PA system.
20. PREAMP OUT: This jack car-
ries the post-Master (10) signal.
Using this jack does not break the
path to the power amp. This signal
can be used to feed an external
power amplifier, mixing console or
house PA system.
21. POWER AMP IN: This jack
accepts a signal to be sent to the
power amp and the Slave Out jack
(18). Using this jack breaks the
path from the signal that was pre-
sent at the Preamp Out jack (20).
This can be used as a post-Master
(10) patch point.
22. IMPEDANCE SELECTOR:
Use this switch to match the output
impedance of the amp to the
speaker(s) being used (2 or 4
ohms). For help in deciding the
total impedance of your system,
consult the chart below.
23. SPEAKER OUT: Two 1/4”
phone jacks and one Speakon
®
jack are provided for connecting
speakers to the unit. These jacks
are wired in parallel to each other.
When operating at or near full
power, the Speakon
®
jack is rec-
ommended for use over the 1/4”
jacks due to its higher current han-
dling capability.
SVT-CL
5
The Rear Panel Controls and Their Use
14 2317 18 19 21 222015 16
Cabinet Number of Total
Impedance
Cabinets Impedance
2 ohms 1 2 ohms
4 ohms 1 4 ohms
4 ohms 2 2 ohms
8 ohms 2 4 ohms
8 ohms 4 2 ohms
NOTE: In some areas 1/4” speaker jacks
are not acceptable for use on amplifiers
with high output power levels. For this
reason the 1/4” jacks on your amplifier
may not be accessable – use the
Speakon
®
jack.