Harp Tone+
Harp Tone+
Harp Tone+

Harp Tone+

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Does that mic sound thin? Does that guitar amp sound light in the bottom? Got a Blues Jr? Then the Harp Tone+ is the answer. This two band equalizer is tuned for harmonica and will improve any guitar amp giving it the tone of a boutique harp amp.

The Lone Wolf Harp Tone+ is the answer for those who want a bassier tone, a fat bottom, and or fewer feedback causing highs; those who want to keep their vintage amp original and un-modded; those who are tired of trying all of the different combinations of tube brands and types; and those who are tired of chasing that silver bullet mod that promises to make their amp a great harp amp. The Harp Tone+ really stands out with tongue blockers, chord playing, and train rhythm.

The Harp Tone+ is essentially a 2-band equalizer with a range of 20dB in gain to a reduction of 20dB in level for both bass and treble frequencies. You can increase or decrease your BASS and TREBLE frequencies as well as lower your VOLUME to control feedback or increase your VOLUME if you want a little gain for solos. The Harp Tone+ does not eliminate feedback, but it does help control it. And it has a true bypass. Give yourself more control over your tone by being able to set your BASS, TREBLE, and VOLUME levels more easily with the Harp Tone+.

Why 20dB in gain? The 20dB in gain for bass frequencies is necessary because they are so low in comparison to the mids and the highs that are produced in harps. They are there, but they are at a very low level. This pedal is ideal for increasing bass frequencies in you tone. It is also ideal for amps with no tone control, for increasing volume during solos, for decreasing feedback, and for giving the harp player more control over his tone when playing through a PA.

The Harp Tone+ improves any guitar amp for use with harp. How? By addressing the shortcomings of the guitar amplifier itself: the coupling caps, the excessive preamp gain, and speakers that do not have a good bass response. The Harp Tone+ provides the gain necessary to drive bass frequencies through the low-value coupling capacitors. If feedback is a problem and the amp starts to feedback too early due to the excessive preamp gain found in all guitar amps, then by lowering the VOLUME on the Tone+, you can counter that excessive gain and now turn the amp's volume up to a much higher level where the VOLUME control setting will not be as critical in relation to feedback. Plus, if you have a speaker that is poor on bass response you will now be able to push it harder with higher-level bass frequencies and bring it to life. If you have a vintage amp without tone controls or with an inadequate tone control, you can now have a quality tone control without expensive mods to your amp.

How does the Harp Tone+ make any mic a better mic? This ability is possible by the ultra high input impedance, the gain available in the bass frequency range, and the VOLUME control that helps control feedback or add volume, whichever your needs are.

The pedal requires a 9v battery or a 9vdc power adapter. The AC adapter requirements are 9vdc with a minimum 100mA output and a 2.1mm x 5.5mm connector with a negative center and positive outside. The battery is switched OFF when an external power supply is used, and the IN jack acts as the ON/OFF switch and the pedal is ON as long as there is a cable plugged into the IN jack. Power adapter is not included.


  1. BASS control
  2. TREBLE control
  3. VOLUME control
  4. 9V DC input (barrel with a negative center)
  5. True bypass with LED indicator
  6. High impedance input
  7. Reverse polarity protection
  8. 10 year warranty on parts and labor
  9. If not satisfied, return within 60 days, for a refund
Customer Reviews
4.9 Based on 18 Reviews
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Ron D.
United States United States

Love it!

Got it for son-in-law and he just loves it!

James J. Gregory
United States United States

New found freedom

A fellow harp player told me about this gizmo that did not distort or”muddy up” the output but just sort of fatten it up. Never cared for any pedals for harp. Always thought they were a crutch for a player who could not create their own tone. This thing does something different. I can play at a lower volume and still get a “fat” sound making smaller venues more accessible without being to loud. Still getting use to what it can do, still “It Works For Me”

Dan C.

Harp Tone + my most important pedal !

I use the Harp Tone + since about 12 years or so. I used a Boss DD-7 delay and the Harp Tone + for many years in combination wit "any" amp, tubes and solid state. Now I also use the Harp Break, mostly for only a little more overdrive, I leave the bass boost job to the Harp Tone +. I use it now on my Gibsonette 1958 Gibson amp and my Supro and I am really satisfied with the tone I can get !

Gareth B.
United States United States


Really gives me that warmer tone I wanted

Norman W.
United States United States

Excellent pedal for the Harmonica

I am able to dial in a fantastic tone while also adjusting volume to help avoid feedback. I have now used this pedal with a microphone from my amplifier to the board as well as going straight to the board from this pedal with excellent results. I highly recommend this pedal.

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