TX-6 vs K.O. Sidekick: Which Teenage Engineering Mixer for iPhone and iPad?

For most people building an iPhone or iPad setup, the $179 K.O. Sidekick is the smarter buy. It gets several devices into iOS, has genuinely playable effects and controls you can actually grab, and costs a seventh of the TX-6.

The $1,199 TX-6 earns its price only if you need six clean channels, want it as the clock master of a bigger rig, are building around a TP-7 recorder, or gig often enough that one machined-aluminium box beats juggling several plastic ones. Both do the core job of summing your gear into the single audio interface that iOS allows. You are paying the TX-6 premium for scale, build and system role, not for better mixing tools.

It is worth starting here, because the cheap one is not missing the basics. Both the TX-6 and the K.O. Sidekick are class-compliant USB mixers and audio interfaces, so both plug straight into an iPhone or iPad with no drivers and no fuss. Both give every channel a three-band EQ and a compressor. Both can multitrack into iOS rather than only sending a stereo mix. On the fundamentals they are far closer than the price suggests.

Scale and role are the TX-6's real advantages. It has six stereo channels and presents up to twelve of them to a Mac or iOS device as separate tracks, where the Sidekick tops out around six mono channels. Its body is machined aluminium, genuinely premium and built to survive years on the road. It has beat tracking, meaning it can read the tempo of an incoming signal and send matched clock out to the rest of your gear, which makes it a true hub rather than just a mixer.

It is also part of the Field system. Pair it with a TP-7 recorder and the TP-7's individual tracks route into the TX-6 for live mixing with per-track effects, then bounce back down to the TP-7 as a finished stereo master. If you are building a serious portable multitrack rig, that integration is the reason people choose it.

The catch is the knobs, and it is a real one. The TX-6's controls are famously tiny. Unless you have slim fingers, adjusting one without nudging its neighbour is a genuine fiddle, and plenty of reviewers have called them cramped. You are buying a beautiful, capable object that is slightly awkward to operate in the moment.

The Sidekick trades the premium build for practicality, and for a lot of people that is the better deal. It is plastic and light, the faders feel a little delicate and the knobs could grip better, but the controls are bigger and far easier to grab and twist while you play. It costs $179.

It also expands. Snap several together with the EP Pegs connectors when you need more channels, and it physically clips onto an EP-133 K.O. II, so two samplers around a Sidekick make a tidy little DJ rig. For a bedroom or mobile setup it does the job you actually need at a fraction of the price.

The effects are where the two really diverge, and it is not a case of better or worse. They are different species. The TX-6 gives you two studio-style effects processors covering reverb, chorus, delay, freeze, tape, filter and distortion, aimed at sweetening and shaping a mix.

The Sidekick gives you six performance effects you play by hand, driven by a little modulation stick and a pressure pad, with a tap sequencer for triggering them in rhythm: a filter that sweeps from low-pass to high-pass, a tempo-synced delay, a tape scratch and stop, a beat-repeat loop, a tremolo and a dub siren. Its EQ even switches between DJ, parametric and studio modes.

So the TX-6's effects are for mixing. The Sidekick's are for performing. Which set you want depends entirely on whether you are finishing a mix or playing a set.

This is the question people really ask, so here is the straight answer. Three Sidekicks cost under $600, less than half a TX-6, and give you a similar total channel count. On price and channels alone they win easily.

What the maths leaves out is everything around the channels. With three units you are managing three boxes, cascade cables between them and a fistful of batteries, and because iOS only allows one audio interface at a time, only one Sidekick can be the interface into your iPad while the others feed it through their outputs. You also get no single twelve-channel feed, no TP-7 integration and no clock mastering. In return you get three sets of those playable performance effects, which for a performer is a genuine plus. Cheaper and more modular, yes. Cleaner and more capable as one hub, no. Pick the trade that matches how you work rather than the one that wins a spreadsheet.

The quick version, side by side.

• Price: TX-6 around $1,199, K.O. Sidekick $179.
• Channels: TX-6 has six stereo channels and a twelve-channel interface; the Sidekick has two stereo channels plus an aux and an eight-in, four-out interface, and chains for more.
• Per-channel EQ and compressor: both have them; the Sidekick's EQ adds DJ, parametric and studio modes.
• Effects: TX-6 studio-style processors for mixing; Sidekick playable performance effects for gigging.
• Build: TX-6 machined aluminium, premium but with tiny cramped knobs; Sidekick plastic and light, delicate faders but bigger, easier controls.
• System role: TX-6 integrates with the TP-7 and acts as a clock master; the Sidekick pairs with the EP-133 K.O. II via EP Pegs.

It comes down to what you are building.

• Buy the K.O. Sidekick if you want a small dawless jam recorded into your phone, a DJ or performance rig with samplers, or simply the cheapest honest way to get several devices into an iPad. For most people this is the answer.
• Buy the TX-6 if you need six clean channels in one bombproof box, want it as the clock master for a bigger rig, are building around a TP-7, or gig often enough that one integrated aluminium tool beats carrying several.

Whichever you choose, remember why you are buying it. iOS only accepts one audio interface at a time, so the mixer's core job is to sum everything into that one interface. Once it does, a recorder on your phone catches the result. Reel, the four-track recorder I make, takes the summed USB output of either mixer straight into a clean 32-bit float recording, so nothing clips when the jam gets loud. For the full picture of wiring a multi-device setup into iOS, there is a longer guide on connecting multiple devices to an iPhone or iPad.