Tremolo
M305
This return of the tremolo effect to the MXR® line
combines a full historical range of masterfully tuned
tremolo styles with a host of features to satisfy the
performance needs of today’s discerning players.
jimdunlop.com/m305
External Controls
External Controls
3
2
4
5
1
6
1 CTR output jack allows use of tap tempo switch,
expression pedal, or stereo output function
2 SPEED knob adjusts rate of effect GAIN knob sets
output level and selects tremolo style (indicated by
flashing red or green LED)
3 GAIN knob sets output level and selects tremolo style
(indicated by flashing red or green LED)
4 DEPTH knob sets intensity of effect
5 FOOTSWITCH toggles effect on/bypass (blue LED
indicates on)
6 CTR slide switch toggles CTR output between tap
tempo/expression and audio output functions
M305 | Tremolo 2
Basic Operation
1. Run a cable from your guitar to the M305’s INPUT
jack and run another cable from the M305’s OUTPUT
jack to your amplifier.
2. Start with all knobs at 12 o’clock. Turn the effect on
by depressing the footswitch.
3. Push the GAIN knob to cycle through tremolo styles,
indicated by red or green LEDs in the LED column.
See TREMOLO STYLES section for a description of
each style.
4. Rotate the GAIN knob clockwise to increase overall
output of effect or counterclockwise to decrease it.
5. Rotate the SPEED knob clockwise to increase
the rate of the tremolo effect or counterclockwise to
decrease it.
6. Rotate the DEPTH knob clockwise to increase the
intensity of the tremolo effect or counterclockwise to
decrease it.
Tremolo Styles
MXR: Classic M159 sound. Indicated by green LED.
BIAS: Vintage bias waveform; emulates lush compression
of browned out tubes. Indicated by red LED.
REVO: Reverse optical waveform; produces more
exaggerated peaks and valleys. Indicated by green LED.
OPTO: Optical waveform; emulates smooth pulsating effect
generated by vintage amplifiers. Indicated by red LED.
SQR: Square waveform for choppy, pronounced effects.
Indicated by green LED.
HARM: Vintage harmonic tremolo for shimmering frequency
modulation. Indicated by red LED.
Power
The Tremolo requires 9 volts (180mA) and can be powered
by the Dunlop ECB003 9-volt adapter or the DC Brick
Iso-Brick
cannot be powered by a battery.
™
, and Mini Iso-Brick
™
power supplies. This pedal
™
,
M305 | Tremolo 3
Advanced Operation
USING A TAP TEMPO SWITCH TO CONTROL
TREMOLO SPEED
Set CTR slide switch to its left position, and connect an
MXR Tap Tempo Switch to the M305’s CTR jack using a
standard instrument cable. While the M305 is on, tap your
desired rhythm onto the Tap Tempo Switch.
USING AN EXPRESSION PEDAL TO BLEND
BETWEEN TWO SETTING CONFIGURATIONS
Set CTR slide switch to its left position, and connect an
expression pedal such as the DVP3 Volume (X)™ Pedal to
the M305’s CTR jack using a TRS cable. Move the toe of
the expression pedal all the way forward and adjust the
GAIN, SPEED, and DEPTH knobs to your desired settings.
Next, move the heel of the expression pedal all the way
backward and adjust the three knobs to different settings.
You can now use the expression pedal to blend from one
setting configuration to the other.
STEREO OUTPUT MODE
USING THE CTR JACK AS A STEREO
OUTPUT
Set CTR switch to its right position, and run an instrument
cable from the M305’s CTR jack to a separate output
source. The RING connection on the OUT jack will be
muted.
STEREO INPUT MODE
For stereo inputs, plug a TRS cable into the IN jack
and set the internal STEREO/MONO switch to its LEFT
position. For mono inputs, set the internal STEREO/MONO
switch to the RIGHT position (factory default). This will
route the mono signal to both stereo outputs.
STEREO | MONO
Stereo Mode pans the tremolo effect from one audio
output to another. To operate the M305 in Stereo
Output Mode, run a TRS splitter cable from the M305’s
output jack to your desired output sources. *Note:
When bypassed, the TRS splitter cable’s output RING
connection will only receive your guitar signal if the M305
is in Buffered Bypass Mode (see relevant section).
M305 | Tremolo 4
Advanced Operation
(cont.)
ENVELOPE MODE
While Envelope Mode is engaged, the SPEED and
DEPTH functions are determined by the intensity of
your own playing. To enter Envelope Mode, push and
hold the GAIN knob for 3 seconds. The blue on/off status
LED will now flash according to the tremolo effect speed,
and the red or green tremolo style LED will be solid.
To set the maximum rate and sensitivity of the tremolo
effect, press and hold the GAIN knob. Use the SPEED
knob to adjust the maximum effect rate, indicated by
the green LEDS flashing at the selected rate. Use the
the DEPTH knob to adjust the effect sensitivity, indicated
by the number of illuminated red LEDs from zero (low)
to three (high). Release the GAIN knob to save your
chosen settings.
Note: The M305 will function in Envelope Mode with
your chosen maximum rate and sensitivity settings even
after turning the pedal off and on again. To exit Envelope
Mode, push and hold the GAIN knob again for 3 seconds.
Both on/off status and tremolo style LEDs will flash
according to SPEED setting to indicate default operation.
BUFFERED BYPASS MODE
By default, the M305 uses a true bypass relay, shutting
off the effect and hardwire bypassing the tip connection
signal as soon as you turn the pedal off. To allow the
M305 to pass your signal through to a TRS connection
when bypassed, you must set it to Buffered Bypass
Mode.
To enter Buffered Bypass Mode, rotate all knobs fully
counterclockwise, and press and hold the GAIN knob
for 5 seconds. All three red LEDs will flash to indicate
that Buffered Bypass Mode is engaged. To switch back
to true bypass, repeat the same process. All three green
LEDs will flash to confirm.
M305 | Tremolo 5
Specifications
Input Impedance 600 kΩ
Output Impedance < 140 Ω
Maximum Intput Level +2 dBV
Maximum Output Level +4 dBV
Speed Control 0.7 Hz to 15 Hz
Depth Control 0 to 100%
*Noise Floor -100 dBV
Current Draw 190 mA
Power Supply 9 volts DC
Specifications at 1 kHz *A-Weighted
M305 | Tremolo 6
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