Electro-Harmonix Headphone Amp

Best for

Players who want the classic Big Muff Pi fuzz/distortion character with the added option to open up the high end or bypass the tone circuit for a more aggressive, uncolored drive.

Who should skip

Players seeking a compact mini-pedal or modern multi-mode drive; this is a full-size, single-voice variant rather than a multi-effect unit.

Watchouts

Output volume increases when the Tone switch is set to OFF (tone circuit bypassed). Requires the EHX-recommended US96DC-200BI or equivalent clean 9VDC supply for noise-free operation. Warranty is one year for original purchasers from authorized dealers.

Likely add-ons

• compatible power supply or battery
• instrument and patch cables

Verify before buying

• What voltage, polarity, and current does this exact revision require?
• Are the original box, power supply, and any model-specific accessories included?
• Does this listing match the exact revision and finish shown in the source photos?
• Is the item still in stock at the displayed price, and what is the complete delivered cost to the intended destination?