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Headphone Amplifier project by Wayne Colburn

WHAMMY

Key Information

  • Headphone Amplifier Project
  • Designed by Wayne Colburn
  • Beginner to Intermediate Difficulty
  • Complete Kit Available
  • Comprehensive Build Guide

Highlights

  • A Class-A amplifier for almost any headphone
  • Can also make a fantastic linestage
  • Want to roll op-amps? Go for it.

Links, Discussions & Files

Wayne Colburn, the genius at Pass Labs who has designed essentially all the things that aren't speaker amplifiers, wanted to make a fun, high-performance, fantastic-sounding, Class-A, DIY headphone amp. It's affectionally known as the WHAMMY.

History

Wayne's Headphone Amp Must Make Yourself

Given the explosion in the popularity of headphones, as well as the unbelievable amount of choice and variety in the market, it seemed that a simple and great-sounding headphone amp would be a great addition to the DIY community. Wayne wanted a universal headphone amp for his desk. This is the fruit of that idea.

This amp is designed to work with almost any headphone; from planars to IEM's, high impedance or low. It has a Class-A output stage with enough current to drive almost anything. It also makes a great linestage / pre-amplifier, and the kits include line-level RCA outputs.

August 2025 Update

The WHAMMY Complete kit now includes everything you need to complete you WHAMMY down to the last nut and bolt; the chassis, the PCB, all the parts, all your wire, all your connectors,  all the bits and pieces, and even some heatshrink tubing. You even get a power cord. There is also a new build guide featuring all the parts and the new chassis.  It provides step-by-step examples of WHAMMY construction.

Reviews

Ear Fidelity review of the WHAMMY

How to build it

WHAMMY Build Guide

Video

Here's a video of Wayne talking about the Whammy at Burning Amplifier Festival 2017 -- Wayne Colburn at BAF '17

Note - Photos include parts available at the time of publishing. Individual components are subject to change based on availability.