The Rear Panel:
19. IMPEDANCE SELECTOR: For the
best performance and least strain on
your amplifier, you MUST properly match
the impedance of your amplifier to that of
your speaker cabinet(s). Set the selector
switch to the 8 or 16 ohm position,
depending on the total impedance of
your speaker cabinet(s). The chart below
can help you determine that impedance
based on the following combinations of
speakers connected in parallel.
CAB. IMP
. # OF CABS. TOT
AL IMP.
8 OHMS 1 8 OHMS
16 OHMS 1 16 OHMS
16 OHMS 2 8 OHMS
32 OHMS 2 16 OHMS
32 OHMS 4 8 OHMS
20. MAIN SPEAKER JACK: Use this
jack to connect the amplifier to your pri-
mary speaker cabinet by means of a
heavy gauge speaker cable. Always
keep the impedance at 8 or 16 ohms,
with the impedance selector switch (#19)
at the proper setting.
NOTE: Use the MAIN SPEAKER jack
first
. Then, if an extension speaker
is desired, connect it to the EXT.
SPEAKER jack.
21. EXT. SPEAKER JACK: Use this
jack to connect the amplifier to a sec-
ondary speaker cabinetby means of a
heavy gauge speaker cable, after
a
speaker has been connected to the main
speaker jack (#20).
22. LINE OUT JACK: This 1/4” jack sup-
plies a line-level output signal from the
power amp for patching into a mixing
board, recording console or external
amplifier. The signal is tapped directly
from the speaker outputs, then attenuat-
ed and electronically compensated to
simulate the sound of a “miked” cabinet.
23. EFFECTS LOOP RETURN:
Connection from an external effects
device is made via this jack. Connect a
shielded instrument patch cord from the
output jack of the effect to the return
jack. This jack is active only when the
effects loop is switched in. The return
jack also doubles as a "power amp in"
jack, to feed a line-level signal directly
into the BV120H's internal power amp.
This is useful when "slaving" two ampli-
fiers together.
24. EFFECTS LOOP SEND: Connection
to an external effects device is made via
this jack. Connect a shielded instrument
patch cord from the send jack to the
input jack of the effect. This jack is
always active. The send jack also dou-
bles as a "preamp out" jack, to feed a
post-eq, pre-amplified signal to a mixing
board, recording console or external
amplifier.
25. FOOTSWITCH JACK: Connect a
stereo 1/4” (tip/ring/sleeve) here from a
two-button footswitch (such as the Crate
CFP-2) for remote control of channel
switching and the effects loop. The tip of
the jack is for the channel switching; the
ring is for the effects loop. When a
footswitch is connected here, the front
panel channel select and effects loop
switches are disabled.
26. AC LINE IN: This grounded power
cord is to be plugged into a grounded
power outlet, wired to current electric
codes and compatible with voltage,
power, and frequency requirements stat-
ed on the rear panel. Do not attempt to
defeat the safety ground connection.
27. FUSE: This fuse protects the amplifi-
er against damages caused by overload
conditions in the unit. If the fuse fails,
replace it only with the same size and
type as indicated on the rear panel. If the
fuse fails continually, the line voltage
may be incorrect, or the amp may need
servicing.
