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 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+.