MXR M85 User manual

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M85 BASS DISTORTION

92503018526REVA

M85 BASS DISTORTION

DESCRIPTION

• Co-designed with Fuzzrocious
Pedals founder Ryan Ratajski

• Based on a famously nasty
distortion circuit

• Separate Dry and Wet
level controls

• Select Silicon or LED diodes to
change clipping character

• Internal control sets the max
output level of LED mode

CONTROLS

DRY knob controls level of
direct signal

WET knob controls level of

eect signal

LED/SIL switch toggles from
silicon to LED clipping (indicated
by blue LED)

TONE knob shapes tone of
distortion signal

DISTORTION knob controls
amount of distortion

FOOTSWITCH toggles eect

6

on/bypass (white LED
indicates on)

LED GAIN knob (internal) sets

7

max output of LED mode

POWER

The Bass Distortion is powered by
one 9-volt battery (remove bottom
plate to install), a 9-volt AC adapter
such as the Dunlop ECB003/
ECB003EU, or the DC Brick™ and
Iso-Brick™ power supplies.

6

DIRECTIONS

• Run a cable from your bass to
the M85’s INPUT jack and run
another cable from the M85’s

OUTPUT jack to your amplier.

• Start with all controls at

12 o’clock.

• Turn the eect on by depressing

the footswitch.

• Use the LED/SIL switch to select
between silicon and LED diodes.
The default Silicon mode (switch

out, blue LED o) has a biting,

aggressive character with a bit
of compression, while the LED
mode (switch pushed in, blue
LED on) has a wide open sound
with a bump in gain.

SAMPLE SETTINGS

GREEN SLUMBER GROOVELOOT

DIST DIST DIST

• Rotate the DRY knob clockwise
to increase direct signal volume
or counterclockwise to
decrease it.

• Rotate the WET knob clockwise
to increase distortion signal vol­ume or counterclockwise
to decrease it.

• Rotate the TONE knob clockwise
for a brighter sound or counter­clockwise for a warmer sound.

• Rotate the DISTORTION knob
clockwise to increase amount of
distortion or counterclockwise to
decrease it.

• The internal LED GAIN control
can be used to lower the max
output of the LED mode. The
factory setting is fully clockwise

for a +7.5dB dierence from the

Silicon mode, which allows for
the full expression of the LED

mode’s character. If you nd
the volume dierence to be too

drastic, then remove the M85’s
bottom plate and use a 3mm slot­ted screwdriver to rotate the LED
GAIN control counterclockwise
to reduce the LED mode’s max
gain to a minimum of +1.5dB (see
Diagram A). Note: Reducing the
max gain of the LED mode will
make it less distinguishable from
the Silicon mode.

DIAGRAM A

7

+1.5dB +7.5dB

SPECIFICATIONS

Input Impedance 1 MΩ
Output Impedance 315Ω @ 1kHz

Signal to Noise 90 dB
Distortion Gain +40 dBV
Dry Max Gain +16 dBV

Bypass True Hardwire

Current Draw 11 mA
Power Supply ECB003 or

DUNLOP MANUFACTURING, INC.

P.O. BOX 846 BENICIA, CA 94510 U.S.A.

TEL: [phone] FAX: [phone]

standard 9 volt

battery