MXR TBM1 Tom Morello Power 50 Overdrive User Manual
- June 6, 2024
- MXR
Table of Contents
TBM1
Tom Morello
Power 50™ Overdrive
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.
External Controls
- FOOTSWITCH toggles effect on/bypass (red LED indicates on)
- PRESENCE knob adjusts high-end frequencies of the overall output signal
- VOLUME knob controls the overall volume of pre-effects loop signal
- BASS knob cuts/boosts low frequencies of pre-effects loop signal
- RETURN jack breaks effects loop connection and receives effects loop output signal
- MIDDLE knob cuts/boosts midrange frequencies of pre-effects loop signal
- SEND jack transmits a post-EQ signal to the effects loop
- TREBLE knob cuts/boosts high frequencies of pre-effects loop signal
- GAIN knob sets overdrive intensity
Basic Operation
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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.
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Start with all controls at 12 o’clock.
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Turn the effect on by depressing the EFFECT footswitch.
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Rotate VOLUME knobl clockwise to increase effect volume or counterclockwise to decrease it.
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Rotate BASS knob clockwise to boost low-end frequencies of pre-effects loop signal or counterclockwise to cut them.
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Rotate MID knob clockwise to boost midrange frequencies of pre-effects loop signal or counterclockwise to cut them.
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Rotate TREBLE knob clockwise to boost high-end frequencies of pre-effects loop signal or counterclockwise to cut them.
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Rotate GAIN knob clockwise to increase the intensity of overdrive or counterclockwise.
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Rotate the PRESENCE knob clockwise to boost overall
high-end frequencies or counterclockwise to cut them. -
If you have the TBM95 Cry Baby® Tom Morello Wah, place it into the FX loop to recreate Tom’s totally 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.
Specifications
| Input Impedance | 700 KΩ |
|---|---|
| Output Impedance | 900 kΩ |
| Return Impedance | 1 MΩ |
| Send Impedance | 10 KΩ |
| Nominal Output Level* | -12 dB |
| Maximum Output Level | 0 dB |
| Nominal Send Level* | -26 dB |
| 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 |
| 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
TBM1 | Power 50 ™
Overdrive