WHAMMY Headphone Amplifier Full Kit
The WHAMMY Class-A headphone amplifier
Wayne Colburn, the genius at Pass Labs who for the last 25 years 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 for this community. We call it:
Wayne's Headphone Amp Must Make Yourself
Yes, it's a silly name. But it's cute. And it explains a lot about it. So it stuck.
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.
Because there are so many choices of headphones, from Planars to IEM's, high impedance or low, this amp will drive any headphone you want to throw at it (Well, not electrostatic headphones directly, no amp like this will, but it will happily drive a step-up transformer like Stax).
Wayne wanted a universal headphone amp for his desk. This is the fruit of that idea. It’s made to be made in an afternoon or an evening and it has no builder adjustments, so it’s going to have a high likelihood of success and completion for beginners and experienced DIYers. 
It's an all in one PCB, just wire the AC & fuse, input and output jacks. Add a selector switch if you like.
Class-A output stage with enough current to drive anything. It also makes a wonderful line stage with about 14db of gain.
You can purchase a full kit on this page, or a-la-carte to suit your budget or desire:
-
WHAMMY PCB
- WHAMMY Chassis
- WHAMMY Completion Kit
- WHAMMY Full Kit (this page)
The full kit includes everything you need to build the project (PCB, chassis and WHAMMY completion kit).
Please note: We have not yet produced a build guide using the new completion kit parts and the new chassis. However you can follow the original WHAMMY build guide and with some help from the forum to answer any questions you might have, you should be able to complete the build without too much trouble.
Reviews
How to build it
Most of the info you need to complete this project can be found in the first 6 posts this thread, a well-illustrated guide showing how everything goes together.
- Step by step WHAMMY build guide on guides.diyaudio.com
- WHAMMY build guide and general discussion thread
- Rough Bill of Materials (this is not the BOM used for the kit)
Video
Here's a video of Wayne talking about the Whammy at Burning Amplifier Festival 2017 -- Wayne Colburn at BAF '17
