Teenage Engineering EP-136 K.O. Sidekick: A Pocket Mixer That Snaps Onto Your Sampler
Teenage Engineering has done it again - taken a familiar idea, shrunk it down, and turned it into something you didn't know you wanted. Announced on 7 May 2026, the EP-136 K.O. Sidekick is a two-channel stereo mixer that weighs just 300 grams and measures only 1.6 centimetres thick. But calling it "just a mixer" misses the point. As the company itself admits, "the plan was to build a mixer for the K.O. II but it became more of an effect-box with a built-in sequencer." It's a mixer, an effects unit, and a performance tool rolled into one slim slab.
More Than a Mixer
At its core, the EP-136 gives you two stereo channel strips, each with its own fader, plus a third "session" input through a stereo auxiliary jack. That alone makes it handy for blending two beat sources and a guest signal. But the fun starts with the six onboard effects: filter, delay, loop, tape, tremolo, and siren. You can run them in series or in parallel, and shape them live using a pressure-sensitive force pad and a bi-directional modulation stick sitting on the right-hand side of the unit.
Teenage Engineering calls the automation system Motion Control. The idea is simple but powerful - you record movements of the effects controls into a short two-bar loop, and the Sidekick plays them back automatically. Suddenly a static beat turns into something that breathes and shifts without you touching it. The EQ section is just as flexible, switching between DJ, studio, and parametric modes depending on whether you're performing or fine-tuning.
A Real Audio Interface, Too
The Sidekick isn't only for the stage. Plug it into a computer over USB-C and it becomes a USB 2.0 audio interface with eight inputs and four outputs. That's enough to record multiple channels of your jam straight into a DAW, or to play backing tracks out from your laptop while you remix on top. Audio runs at 48kHz and 24-bit, with a signal-to-noise ratio of 105dBA on the inputs and 108dBA on the outputs - clean numbers for something this small.
There's a cue output for headphone monitoring, beat-match functions on both channels, and a colour LCD to keep an eye on what's happening. Power comes from either two AAA batteries or USB-C, so it works tethered to a desk or off-grid on a park bench.
Built to Connect
This is where the Sidekick gets clever. It's designed as a companion to the EP-133 K.O. II, the pocket sampler that won a lot of fans when it arrived, and it doesn't just sit next to it - it physically snaps on. The EP series shares mounting points, so the EP-136 clicks onto the K.O. II to form one tidy rig that travels and performs as a single block. Teenage Engineering even sells a Sidekick starter pack with the cables and connector pegs you need to bridge machines together.
And it doesn't stop at one unit. Multiple EP-136 mixers can be chained together to expand the channel count, so a setup that starts as a simple two-channel box can grow into something far bigger. The same logic applies across the EP family - the K.O. II sampler and the EP-1320 Medieval both slot into this modular way of thinking. You buy small, then build outward as your ideas (and your shows) get more ambitious. It's the same philosophy that runs through Teenage Engineering's earlier Pocket Operators and the OP series: little boxes that do one thing well and play nicely together.
A Companion With Its Own Voice
What makes the Sidekick interesting is that it isn't locked to the K.O. II at all. Yes, it was born as an accessory, but the built-in sequencer, the effects engine, and the standalone audio interface mean it can stand on its own. Feed it any two stereo sources - a phone, a drum machine, a synth - and it turns into a compact live-remixing station for "live-remixing your beats," as the company puts it. The K.O. II makes a natural partner, but it's far from the only one.
For anyone already inside the EP ecosystem, the EP-136 is an easy yes. For everyone else, it's a tempting entry point: a tiny, battery-friendly mixer that records to your computer, warps your sound in real time, and grows with you. Teenage Engineering keeps finding ways to make small gear feel like a complete system, and the Sidekick is one of its smartest moves yet.
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