Ampeg HERITAGE SVT-CL - Manual (Page 7)

Heritage SVT-CL Bass Guitar Amplifier
7
The Rear Panel continued
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 9 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 jack is the
output at the power amp in. Thus, it
will include any processing done in the
Preamp Out/Power Amp In loop. This
signal may be used to feed an external
power amplifier, mixing console or house
PA system.
20. POWER AMP IN: This jack connects
directly to the internal power amp for
use with an external preamp. When
using an external source, connect the
OUTPUT of the source to this jack using
a shielded instrument cable to feed the
signal into the power amp section. The
internal signal is disconnected when a
plug is inserted into this jack.
21. PREAMP OUT: This jack is a direct
post master preamp output for use with
an external power amp. Connect the
external amp’s input to this jack using a
shielded instrument cable.
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 OUTPUTS: Two 1/4” output
jacks and one Speakon ® output jack
supply speaker-level power to the
cabinet. The rated power output is 300
watts rms into 2 or 4 ohms.
The two identical outputs are wired in
parallel, and you can use either one, or
use both. Make sure the total speaker
impedance load is 2 ohms or greater.
Use speaker cables with Speakon ® or
1/4" TS ends to make the
connections. Do not use instrument
cables as they may overheat.
NOTE: In some areas, 1/4” speaker
jacks are not appropriate for use on
amplifiers with high output power
levels. For this reason, use the
Speakon ® jack instead.
23 22 21 20 19 18 17 16 15 14
23 22 21 20 19 18 17 16 15 14
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