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REAR pANEL
BREAKER
T8A/250V
AC 120V
60Hz 800W
This device complies with Part 15
of the FCC Rules. Operation is
subject to the following two conditions:
(1) This device may not cause
harmful interference, and
(2) This device must accept any
interference received, including
interference that may cause
undesired operation.
1. Horn on/off switch. Push to activate or
de-activate horn
2. Two-conductor, 1/4" Speaker Output Jacks,
2 Ohms minimum load, parallel. The B450
operates at 450 watts with the internal
speakers, and a full 600 watts with
an additional speaker (4 ohm minimum).
3. Direct Out EQ Switch determines whether your
direct out signal will include your EQ settings
or not.
4. Direct Out with Volume Control sends a line-
level signal to a PA system or recording device.
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w w w . a c o u s t i c a m p l i f i c a t i o n . c o m
9010 Acoustic B450 manual.indd 8
1
2
Bass Head
MINIMUM TOTAL IMPEDANCE:
B450
2 Ohms: PARALLEL
600 Watts RMS
ON
HORN
OFF
SPEAKER OUTPUTS
NO USER SERVICEABLE PARTS
3
POST
EQ
PRE
EQ
DRY
EFFECTS
SEND
Use the Direct Out Volume knob to
prevent clipping.
5. Ground Lift Switch lifts ground on pin
1 on XLR.
6. Unbalanced, 1/4" Effects Loop Send & Return
jacks allow a signal to be sent to an external
effects device or equalizer, then patched back
in before the power amp section.
7. Footswitch Jack controls mute and notch filter.
8. Tuner Send feeds a dedicated signal to
your tuner.
4
5
DIRECT OUT
GROUND
VOLUME
DIRECT OUT
LIFT
WET
EFFECTS
EFFECTS
FOOT
TUNER
MIX
RETURN
SWITCH
SEND
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7/24/09 11:18:04 AM