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23. POWER CORD: Connect the male end
of this cord to a properly grounded AC
power outlet. Use only a grounded outlet!
DO NOT defeat the ground pin of the
cord! If the amplifier is used outside of the
United States, see the area’s Crate dealer for
the proper power cord or consult a local pro-
fessional electrician.
24. EFFECTS LOOP RETURN: When
using an external signal processor, the best
results will be obtained when the device is
connected to the amplifier’s effects loop for
virtually noise-free operation. This jack
receives the output signal from such a
processor
25. EFFECTS LOOP SEND: This unbal-
anced jack lets you send a signal out to an
external effects processor or tuner. The signal
at this jack is post-EQ, pre-Master. Connect
this to the input jack of the processor or
tuner. Use shielded cables with mono 1/4”
plugs for connecting the Effects Loop.
26. BIAMP LOW OUT: When used in
the biamp mode, this output connects to
the low frequency power amplifier. See
the section entitled “Using the Biamp
Capabilities” on pages 6 - 9 for details.
27. BIAMP HIGH OUT: When used in
the biamp mode, this output connects to
the high frequency power amplifier. See
the section entitled “Using the Biamp
Capabilities” on pages 6 - 9 for details.
28. PREAMP OUT: A pre-amplified line
level signal may be tapped from this jack for
sending to an external amplifier, powered
monitor, recording console, mixing board or
effects processor. This is an unbalanced,
mono 1/4” jack.
29. POWER AMP IN: A pre-amplified line
level signal may be sent directly into the bass
amp’s power amp (as when slaving two
amplifiers together, for example). Connection
to this jack interrupts the signal from the inter-
nal preamp to the power amp. The Preamp
Out (#28) signal is not interrupted.
30. SPEAKERS: Use these jacks to connect
the amp to your speaker cabinet(s). Use
heavy duty speaker cables with mono 1/4”
plugs. These jacks are wired in parallel. Don’t
use cabinet combinations resulting in imped-
ance loads below 4 ohms. Use the following
chart to help determine parallel loads. If in
doubt, ask your dealer.
Cab Imp. # Cabs Total Imp.
8 ohms 2 4 ohms
16 ohms 2 8 ohms
16 ohms 4 4 ohms
31. BALANCED LINE OUT: Use this 3-pin
XLR jack to send a line level signal to the
house sound board or mixing console. The
level of the signal at this jack is determined by
the setting of the Line Out Level control on
the front panel (#10). This signal is switch-
able to be either pre or post EQ through the
front panel Pre/Post switch(#11).
MADE IN THE U.S.A.
BY SLM ELECTRONICS
1400 FERGUSON AVE.
ST. LOUIS, MO 63133
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
WARNING:
TO REDUCE THE
RISK OF ELECTRIC SHOCK, DO NOT
EXPOSE THIS EQUIPMENT TO RAIN
OR MOISTURE.
AVIS:
RISQUE DE CHOC
ELECTRIQUE. NE PAS OUVRIR.
MODEL
SERIAL #
1200W MAX / 120V / 60Hz
BX-440H
CAUTION: CHASSIS SURFACE HOT.
ATTENTION: SURFACIE DE CHASSIS CHAUDE.
AC LINE IN
The Rear Panel:
5
BX-440H / BX-4115
BX-440H / BX-4115 ThunderBass Amplifier