Headphone Amp In A Stompbox

KMA has expanded their Utility Series with the STEREO HEADPHONE AMP. This is what they have to say about it...

At first glance it might look like "just" a headphone amp. But KMA and "just" don't really go together. So, we gave it a powerful amplifier that can hook up to two pairs of cans simultaneously, a mixable Aux Input with both analog and Bluetooth, clever auto-sensing Ins and Outs and flexible routing options. Plus, like all KMA Machines pedals, it is still hand-built by real humans in our Berlin workshop.

Our Utility Series boxes have graced thousands of rigs worldwide. This one is no exception - it's an extremely handy box that will no doubt find a permanent home in many setups. There's plenty more where this came from in 2026, so stay tuned. As a subscriber, you'll always hear it here first.

A few years ago we released ENDGAME, which is our ultimate end-of-chain utility device. Featuring IR Cab Sims, Power-Amp simulation, True Stereo Doubling, Stereo FX Loop, Aux-in, Bluetooth, Dual Headphone Amp and much, much more. For those that don't need all this power, we decided to take the pristine and powerful dual headphone output stages as well as the flexible AUX features and in the process created the definitive, yet still affordable, stereo headphone amp in a pedalboard friendly box.

You can use it as a standalone clean headphone amplifier or you can place it after your amp-sim of choice. Maybe you want a simple way to incorporate backing tracks into your setup? Well, you can do that with the AUX in and Bluetooth features. For instance, this could allow you to trigger samples and/or full tracks via your phone or computer.
 
In addition, it's full Stereo In and full Stereo Out, so you can incorporate your divine stereo effects as well and output it to a stereo interface, mixer or PA with or without the Aux mix present.

This device might look deceptively simple, but it's serious value for money in every sense possible.

Main Features:

• Exceptional and Powerful Headphone Amp
• Hear the end of your pedalboard
• Dual Headphone Outputs, with large level control
• Aux Input - Bluetooth Audio or 3.5 mm Stereo Analog
• Aux/Main Mix/Blend Control
• Premium Analog and high-headroom audio, with high-impedance input circuitry
• Flexible internal signal routing - full Mix or Buffered Thru Outputs
• Auto Detect TS/TRS 6.35 mm Inputs and Outputs - Stereo or Mono
• Made in Berlin, Germany
• Powered by (opt.) 9 V DC PSU (centre -, 2.1 mm, <250 mA current draw at max load, not included)

Pricing and Availability:

189€ / $229.99 / £169

More information:

• KMA