REAR PANEL CONTROLS
17
22
23
21
18
20
19
16
25
24
22
23
21
24
19
26
20
13. MASTER VOLUME
Use the MASTER to control the overall volume of the amplifier. Reduce the MASTER level if clip-
ping occurs as indicated by the PEAK LEDs (see #15). Using the COMPRESSOR will also help pre-
vent clipping. The MASTER control also affects the HEADPHONE output.
14. POWER AMP CONTROL (B
X1200 ONLY
)
The 1 LO and 2 HI levels control the volume to the individual amps. These are used to balance
the low and high frequency speaker cabinets when in X-OVER bi-amping mode. To set the balance,
bring up the 1 LO knob until the desired volume level is reached. Now bring up the 2 HI knob until
the desired balance has been achieved. Use the MASTER volume control to set the overall volume.
15. PEAK LEDS
The red PEAK LEDs are clipping indicators for the amplifier(s). If the amps are clipping use the
MASTER to reduce the level. The COMPRESSOR may also serve to help prevent clipping. Be sure
not to run the amps with heavy continuous clipping (PEAK LEDs ON) or your speakers could be
damaged.
16. DI LEVEL (DIRECT OUT)
The DI LEVEL controls the output level of the XLR DIRECT OUTPUT. The DI level is not affected
by the MASTER level.
17. DIRECT OUT PRE/POST SWITCH AND GROUND LIFT SWITCH
The direct out PRE/POST switch allows the choice of either a simple buffered signal straight from
the input jack (PRE mode) or a processed signal including the Drive, Compressor, Tone, Graphic
EQ, and Effect Loop processing (POST mode).
If a hum occurs when connecting the XLR to a mixer, try using the GND LIFT switch. The GND
LIFT switch lifts the ground pin 1 of the XLR to 100 ohms above chassis ground.
18. DIRECT OUT XLR JACK
The DIRECT OUT XLR jack provides a balanced independent output for going direct to the main PA
or recording input. The front MASTER control does not affect the output level. The XLR is protected
against Phantom power (DC voltage) on cables coming from mixer inputs.
19. FOOTSWITCH AND CONFIGURATION SWITCHES
The optional
FS22
footswitch can be used to remotely control 2 of these 3 features:
MUTE, graphic EQ, or EFFECTS LOOP bypass.
The two configuration switches set the functions of the FS22 footswitch. The left switch controls the
footswitch connected to tip of the 1/4” plug and the right switch controls the footswitch connected to
the ring of the plug. There are four configurations:
The rear LEDs near each switch work with the front LED of the Effects loop and Graphic EQ. These
LEDs will only light when the feature is turned ON by the footswitch. Use them to verify the configu-
ration switches are in the desired positions.
Any standard footswitch with a stereo (TRS) plug will work.
20. EFFECTS LOOP (SWITCHABLE)
The SEND jack is the output of the preamp and is designed to deliver the proper level for the input
of an external effects processor. The SEND signal source is after the TONE CONTROLS and COM-
PRESSOR (#7, #8, & #9).
The RETURN jack is designed to receive signals from the output of an external effects processor.
When a signal is plugged into the RETURN, it breaks the connection between the preamp and the
internal power amp. The RETURN signal goes through the GRAPHIC EQ (if active) and MASTER
controls to the power amp(s).
The EFFECT LOOP can be bypassed with the front panel switch (see #11) or optional FS22 footswitch
(see #19).
21. AMP INSERT JACKS
The AMP INSERT jacks are TRS (Tip-Ring-Sleeve). The “TIP” is the SEND and the “RING” is the RETURN.
Using a TRS (Tip-Ring-Sleeve) insert cable, the preamp signal can be sent out via the TIP to an external proces-
sor and then returned to the internal power amp via the RING. If a standard (Tip-Sleeve) instrument cable is
used, the signal can be routed from the preamp to an external power amp. These insert jacks break the signal
to the internal power amplifier.
Use the MASTER (or AMP 1 & 2) controls on the front panel for SEND level adjustments.
When the X-OVER is OFF, both outputs receive the same full range signal. When the X-OVER is ON, AMP 1
receives the low frequency signals and AMP2 receives the high frequency signals.
22. HEADPHONE
The HEADPHONE jack is a stereo 1/4” jack. Volume is adjusted by the MASTER control. To listen
to headphones without hearing other speakers, unplug the speakers. Effects used in the AMP INSERTS
will be heard in the headphones. The
BX600
sends a mono signal to each side of your headphones.
23. TUNER LINE OUT JACK (UNMUTED)
The
TUNER LINE OUT
jack is provided as a place to connect a tuner. This output is unaffected by the
MUTE function so you may tune your bass quietly while using the MUTE.
24. SPEAKER OUTPUTS (SEE IMPEDANCE CHART ON BACK PAGE)
The
BX1200
uses three combination 1/4” and
SPEAKON®
speaker output connectors. Multiple speak-
ers can be attached by chaining cabinets together, so long as the total impedance is not below 2 ohms
for each SPK 1 or SPK 2 jack and 4 ohms for the BRIDGE ONLY jack. 1/4” speaker cables can be plugged
into the center of the green
SPEAKON® jacks
. The
SPEAKON® connector is highly recommended
for BRIDGE mode
(see #25)
.
The
BX600
uses two standard 1/4” speaker jacks. The jacks are connected in parallel and either or
both jacks can be used so long as the total impedance does not go below 2 ohms. The
BR610
and
BR615
combos use 4 ohm speakers. When adding additional speakers to these combos, the exten-
sion speakers must be a total of 4 ohms or more to stay above the
BX600
’s 2 ohm minimum load.
25. AMP BRIDGE SWITCH (BX1200 ONLY)
The
AMP BRIDGE
switch enables the full power of both amps in the
BX1200
to be sent to the single
BRIDGE ONLY jack. Total minimum impedance is 4 ohms. DO NOT connect speakers to the SPK 1 or
SPK 2 when in
AMP BRIDGE
mode.
NOTE
: In the AMP BRIDGE mode, the MASTER and POWER AMP1
controls adjust the output volume.
26. AC POWER & FUSE
The detachable AC POWER CORD supplied is designed to operate with one type of voltage (the
European 230V export model uses a CEE-7 plug cord set). Check the rear power cord label for the
proper voltage. Plug the cord into a grounded 3 prong power source. No attempt should ever be
made to use the amp without the ground connected.
The FUSE is located internally above the AC connector cord. To check or replace the fuse, remove
the power cord and the enclosure lid. The fuse type is a 250V Fast Blow rated at 20A for 120V or
10A for 230V models.
BX600 REAR
TIP switch
setting
RING switch
setting
footswitch 1
function
footswitch 2
function
TIP LED 1
(must be on)
RING LED 2
(must be on)
IN
IN
Effect Loop
Graphic EQ
GREEN
BLUE
OUT
IN
MUTE
Graphic EQ
off
BLUE
IN
OUT
Effect Loop
MUTE
GREEN
off
OUT
OUT
MUTE
not used
off
off
BX1200 REAR