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Don’t sell your soul to a creditor to get the gear you need. At AMS, we want to lower the barriers to create. That’s why we offer in-house 0% financing, and you don’t even have to open a new line of credit! Spread out payments on your credit card to simplify financing and avoid hefty late fees or service charges. Cost shouldn’t interfere with your creativity.
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The EP-136 K.O. Sidekick is a compact two-channel mixer, audio interface, and effects processor that punches well above its weight class. Six motion-controlled effects, three EQ styles, individual compressors per channel, and built-in beat matching make it less of an accessory and more of a standalone solution. Run it on two AAA batteries, connect via USB-C, and take it on stage, into the studio, or link multiple units together when one just isn't enough.
Two Channels, Zero Compromises
A two-channel mixer that moonlights as an audio interface and effects processor sounds like it's trying to do too much — and yet, somehow, the K.O. Sidekick pulls it off without breaking a sweat or asking for a raise. Individual compressors on both input channels mean your levels stay tight, while the three available EQ styles give you real tonal control without requiring a degree in audio engineering to operate.
Dual-Channel Mixing with Individual Compressors: Each input channel gets its own compressor, keeping dynamics in check so your mix stays punchy and polished, even when things get chaotic on stage.
3 EQ Styles: Dial in the right frequency response for the job — whether you're cutting low-end mud, boosting presence, or just adding a little shape to keep things interesting.
Beat Matching Per Channel: Sync your sources in time without the guesswork. It's the kind of feature that used to require expensive outboard gear; now it fits in your jacket pocket.
Performance FX That Move
The K.O. Sidekick's six motion control effects aren’t your average set-and-forget filters. They respond to physical movement, which means your performance gets a dimension of expressiveness that most mixers simply do not offer. This is the part where you start doing things with your hands that look incredibly cool to anyone watching — and sound even better through the speakers.
6 Knock-Out Performance FX: From stutters and filters to modulation-style effects, each one is designed for real-time performance control, not just background ambience.
Motion Control: The effects respond to physical movement of the unit itself, turning your mixer into a hands-on instrument rather than a passive signal router.
Live-Ready Workflow: The controls are intuitive enough that you can operate them mid-performance without accidentally setting off some kind of audio catastrophe.
Studio Power, Battery-Operated Convenience
The Sidekick operates as an 8-in/4-out USB audio interface and MIDI controller, which is the kind of spec sheet that raises eyebrows in the best possible way. And because Teenage Engineering apparently decided power outlets are optional, the whole thing runs on two AAA batteries — or USB-C if you're feeling more conventional. It works standalone, integrates with a DAW, and links with additional units when your ambitions outgrow a single box.
8 Ins / 4 Outs USB Audio Interface + MIDI Controller: A full-featured interface tucked into a palm-sized device, compatible with any setup that takes audio seriously and desk space personally.
Powered by 2x AAA Batteries or USB-C: Go wireless for live sets or plug in for extended studio sessions. Either way, the Sidekick keeps going — which is more than can be said for most gear.
Expandable by Linking Units: Need more channels? Link multiple K.O. Sidekick units together and grow your setup without overhauling it. Scalability without the spreadsheet.
A Sidekick That Can Run the Show
The Teenage Engineering EP-136 K.O. Sidekick is the rare piece of gear that makes every setup around it better without demanding any of the credit. It’s compact, capable, and surprisingly deep — the kind of tool that reveals new tricks the longer you spend with it. If you need a mixer, interface, effects processor, and MIDI controller that fits in your bag and runs on batteries, this is it. Everything else is just taking up space.
Inputs: two 3.5 mm stereo inputs, 3.5 mm stereo aux input
Outputs: 3.5 mm main output, 3.5 mm cue output
Dimensions: 24 x 8.8 x 1.6 cm / 9.45” x 3.46” x 0.63”
Weight: 300 g / 10.6 oz
Power: 2x AAA batteries or USB-C (optional)
Frequently Asked Questions
The K.O. Sidekick is a two-channel mixer, USB audio interface, MIDI controller, and effects processor in a single compact unit. It handles mixing, signal processing, and live performance effects all at once — without requiring a dedicated power supply.
Yes, it operates as an 8-in/4-out USB audio interface and connects directly to a computer via USB-C. It also functions as a MIDI controller, making it a capable studio tool as well as a live performance device.
The Sidekick runs on two AAA batteries for fully wireless use or via USB-C for powered operation during studio sessions or longer gigs. Both options deliver full functionality with no performance trade-offs.
Yes, multiple units can be linked together to expand your channel count as needed. It's a straightforward way to scale your setup without replacing your existing gear.
The Sidekick includes six performance-focused effects that respond to physical movement of the unit itself. They're designed for real-time expressive control during live sets, adding a hands-on, dynamic element to your performance.
