TOM MORELLO
™
POWER 50
OVERDRIVE
TBM1
For more than 30 years, the key component of Tom
Morello’s raw, hard-hitting sonic voice has been his
amp setup. The MXR Power 50 Overdrive captures
the sound and functionality of that setup for use with
any rig, whether you have a simple combo amp or a
high-end custom stack.
jimdunlop.com/mxr
External Controls
3 4
6 8 9
5 7
2
1
1 FOOTSWITCH toggles effect on/bypass (red LED indicates on)
2 PRESENCE knob adjusts high-end frequencies of overall
output signal
3 VOLUME knob controls overall volume of pre-effects loop
signal
4 BASS knob cuts/boosts low frequencies of pre-effects loop
signal
5 RETURN jack breaks effects loop connection and receives
effects loop output signal
6 MIDDLE knob cuts/boosts midrange frequencies of pre-effects
loop signal
7 SEND jack transmits post-EQ signal to effects loop
8 TREBLE knob cuts/boosts high frequencies of pre-effects loop
signal
9 GAIN knob sets overdrive intensity
MXR | Power 50 2
Basic Operation
1. Run a cable from your guitar to the TBM1’s INPUT jack
and run another cable from the TBM1’s OUTPUT jack to
your amplifier. If using the effects loop, run a cable from
the TBM1’s SEND jack to the input of the first pedal in
your loop. Run another cable from the output of the last
pedal in your loop to the TBM1’s RETURN jack. Note:
effects loop signal is only active while TBM1 is engaged.
2. Start with all controls at 12 o’clock.
3. Turn the effect on by depressing the EFFECT
footswitch.
4. Rotate VOLUME knobl clockwise to increase effect
volume or counterclockwise to decrease it.
5. Rotate BASS knob clockwise to boost low end
frequencies of pre-effects loop signal or counterclockwise
to cut them.
6. Rotate MID knob clockwise to boost midrange
frequencies of pre-effects loop signal or counterclockwise
to cut them.
7. Rotate TREBLE knob clockwise to boost high end
frequencies of pre-effects loop signal or counterclockwise
to cut them.
8. Rotate GAIN knob clockwise to increase intensity of
overdrive or counterclockwise.
9. Rotate the PRESENCE knob clockwise to boost overall
high-end frequencies or counterclockwise to cut them.
10. If you have the TBM95 Cry Baby® Tom Morello
Wah, place it into the FX loop to recreate Tom’s tonally
balanced and aggressive vocal wah sweeps. Placing the
TBM95 before the TBM1 will produce a subtle wah effect,
while placing the TBM95 after the TBM1 will create a
treble-focused toe-down wah response.
Power
The MXR® Tom Morello Power 50™ Overdrive is powered by one
9-volt battery (accessible via battery door on bottom plate), a
9-volt AC adapter such as the Dunlop ECB003/ECB003EU, or
an MXR Brick™ Series power supply.
MXR | Power 50 3
Specifications
Input Impedance
Output Impedance 900 kΩ
Return Impedance 1 MΩ
Send Impedance 10 KΩ
Nominal Output Level* -12 dBV
Maximum Output Level 0 dBV
Nominal Send Level* -26 dBV
Controls
Bass +4 dB, -21 dB, 50 Hz
Mid ±7 dB, 500 Hz
Treble ±7 dB, 5 kHz
Treble*** +7 dB, -21 dB, 5 kHz
Presence +7 dB, 4 kHz
700 KΩ
Bypass True Hardwire
Current Draw 12 mA
Power Supply DC 9 volts
* All controls at mid position
**A-weighted, all controls at mid position
***MID control at maximum counterclockwise position 0 dBV= 1 Vrms
MXR | Power 50 4
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