Lone Wolf Harp Attack


The Harp Attack is designed to provide true power tube distortion in a pedal. This pedal is not your typical tube preamp that uses a triode; this pedal uses a subminiature beam power tube, which is the same type tube as a 6V6 or a 6L6 to provide the tone of an overdriven tube amp. It produces a fat punchy tone that can be set with the exact amount of overdrive desired. You can certainly tell there is a tube inside of this pedal. The pedal is designed with a high impedance input buffer providing 10M ohms of resistance to get the best tone from your crystal, CM, or other high impedance microphones. The pedal features a DRIVE control to set the amount of power tube saturation desired, an active tone control with a 20dB range that is tuned for harp frequencies, and an output VOLUME control to set the output level. The output of the pedal is also buffered with an FET amp that adds extra gain to extend the life of the tube; this gain is controlled with the VOLUME control. Our current version now has a different tube to eliminate microphonics.

The Harp Attack fills several needs of harp players. For instance, by providing true power tube overdrive distortion in a pedal, it allows you to plug straight into a PA and get an overdriven 6V6 sound or dirty-up an amp that is otherwise too clean.The Harp Attack gives an excellent tube sound to a solid state amp, and it makes a great, easy to bring-along, back-up harp amp. The pedal does not produce massive distortion, but a smooth overdriven tone. Put it in your harp case and take it to jams or use it in-line with other pedals to develop your own signature tone. I recommend that you install this pedal last in-line with other pedals, but this is only a recommendation. This pedal is also becoming popular for taking on tour in Europe. Demo can be found here .

The Harp Attack operates with two 9 volt batteries or one 18V DC power adapter. The DC adapter requirements are a regulated 18V DC with a minimum 100mA output and a 2.1mm x 5.5mm connector with a negative center. The battery is switched OFF when an external power supply is used, and the “IN” jack acts as the pedal ON/OFF switch. Battery life is estimated at 15 hours of playing time. Power adapters  are sold separately.

In stock (can be backordered)


  1. DRIVE control
  2. TONE control
  3. VOLUME control
  4. Actual power tube distortion
  5. 18V DC input (barrel with a negative center), adapter sold separately
  6. True bypass with LED indicator
  7. High impedance input
  8. Reverse polarity protection
  9. 5-year warranty on parts and labor

Additional information

Weight .5 kg
Dimensions 16 × 10 × 5 cm

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