Tame The Wild Horse: How Two-Notes Captor Reactive Loadboxes Make Your Tube Amp Playable, Recordable And Enjoyable!

There is a photograph every guitarist recognises without ever having seen it. A horse up on its hind legs, all muscle and refusal, and a man at the end of a rope who is very clearly not winning yet. Nobody looks at that picture and thinks the horse should be smaller. The horse is magnificent. The horse is also, right now, completely unusable.

That is your tube amp. Everything you love about it — the way the power section compresses when you dig in, the way it blooms and sags and pushes back against your hands — only shows up when the thing is working hard. And working hard means loud. Loud enough that you can't record it, can't rehearse with it, can't turn it up in a Malaysian apartment block after nine at night without a conversation you'd rather not have. So the amp sits at 2 on the dial, sounding thin and polite, and the best thing about it never happens.

Two Notes build the reins.

Three Reasons Your Amp Fights You

Every guitarist who owns a valve amp has run into at least two of these.

It only sounds right when it's loud. A 50-watt head finds its magic somewhere between "the neighbours are annoyed" and "the neighbours are calling someone." Below that, you're hearing a fraction of what you paid for.

You can't record it without a room, a mic and some luck. Miking a cab needs a space where noise is acceptable, a decent microphone, and the technique to place it. Move the mic an inch and the tone changes completely. At 2am, none of that is happening.

And when you do get it on stage, somebody else decides how it sounds. The venue's engineer picks the mic and the position, usually in about ten seconds during a changeover. Whatever you spent years building arrives at front of house filtered through whatever was lying around.

Notice that not one of those is a complaint about how your amp sounds. They're all about what happens after the speaker. Which is precisely the part a Torpedo replaces.

What's Actually Inside The Box: The Bridle

Here's the piece of engineering that makes all of this possible, and it's worth understanding because it's also the reason cheap alternatives disappoint.

A valve amp must have a load connected to its speaker output. Always. Two Notes put the consequence plainly: running a tube amp with nothing connected "can lead to partial or complete destruction of the output stage." Premier Guitar are just as blunt — you must always have a load of some sort connected, or you can severely damage the amp. So "just unplug the cab and take a line out" was never an option.

A load box gives the amp something safe to push against. But — and this is the whole game — a plain resistor isn't good enough, because a real speaker is nothing like a resistor.

A real speaker's impedance changes wildly with frequency. Sound on Sound give the numbers: a nominally 8-ohm loudspeaker may peak at 40 to 50 ohms at its resonant frequency, typically somewhere around 100Hz, drop back to its rated impedance between 400 and 600Hz, then climb again to perhaps 30 ohms at 20kHz. Your amp has been arguing with that moving target its entire life, and that argument is a large part of what you hear and feel.

Kill the curve and you kill the feel. Premier Guitar are direct about it: resistive attenuators eliminate that impedance curve, and as you attenuate further "the tone and feel of the whole rig changes," becoming more compressed and darker. Sound on Sound note that early purely-resistive dummy loads left players reporting that their amps felt "stiff and less responsive under the fingers." Fryette's own manual says resistive designs "interrupt the natural interaction between the speaker and power tube stage of your amplifier causing an artificial, compressed sound and stiff feel."

A reactive load box mimics that impedance curve instead of flattening it. Two Notes: "The embedded load in the Torpedo products is reactive: it embeds a specific circuit to simulate the complex impedance of a real speaker." Your amp doesn't know the cab is gone. It behaves exactly as it always has.

That's the bridle. Everything else is what you do with it.

Taming Act One — Controlling The Volume

The first thing you want is to decide how loud this gets. Not the amp — the amp stays where it sounds good. The room.

On the Torpedo Captor, there's a Speaker Attenuated output giving you a fixed −20dB to your real cabinet, plus a Speaker Thru output that runs at full power. Two levels, both simple, no menu.

On the Torpedo Captor X, it's a three-position switch, and the names tell you everything about how Two Notes think about this:

• Stadium — 0dB. Full power. Everything the amp has.
• Club — −20dB. Loud enough for a band, quiet enough for a small room.
• Home — −38dB. Cranked amp, conversation-level cabinet.

Three settings, and they're switch positions rather than a continuous sweep — worth knowing if you need to trim level by a couple of dB on stage. (If continuous attenuation is what you're after, that's the Torpedo Reload II, which is a bigger conversation — see continuous attenuation and the whole amp collection.)

One important behaviour, because it catches people out. On the Captor X, when the switch is on Stadium and you have a cabinet plugged into the speaker output, the internal load box disconnects — your amp is seeing the cabinet, not the Captor X. At Club and Home, the amp sees the Captor X's own reactive load. Same on the plain Captor: plug into the Thru output and the internal load box hands over duty to your cab. So at full power, impedance matching is back to being your problem. Match your amp's output to your cabinet as you always would.

Taming Act Two — Losing The Speaker Cabinet

This is the one that changes what's possible in a small home.

Leave both speaker outputs empty. The internal reactive load absorbs everything your amp produces, and the box hands you a signal instead of sound. No cabinet in the room at all. Nothing to hear except what you send to headphones or a desk.

But a load box on its own gives you silence, not tone — because you're now missing the speaker, and the speaker was doing more work than you realised.

A guitar speaker is a filter, and a fairly brutal one. It rolls off the top end at roughly 4 to 5kHz, and cuts low frequencies from somewhere around 100 to 200Hz. A distorted power stage produces plenty of harmonic content well above that ceiling — content a real speaker has never once let you hear. Take a raw line out from a speaker jack and all of it arrives at the desk intact. That's the fizz. That's why unprocessed amp output sounds like a wasp in a biscuit tin.

So you need something standing in for the speaker, and this is where the two boxes diverge sharply.

The Torpedo Captor has an analog speaker simulation — a filter with two fixed voicings, guitar and bass, modelled on specific DynIR captures (Two Notes name the Brit VintC cabinet with a Dyn57 mic for guitar, and the Fridge cabinet with a Cnd87 for bass). It's engaged by a switch on the panel.

And here is the single most misunderstood thing about the Captor, so read this twice: the speaker simulation is on the DI output only. The manual is explicit — "the speaker simulation is not active on the LINE output." The line out is deliberately dry, "the raw signal coming straight out of the amp." That isn't a fault; it's the point. The dry line out is what you record when you want to choose your cabinet later in software. Almost every write-up of this pedal gets it wrong, and people end up wondering why their line recording sounds terrible.

Speaker level in, line level out. Record the dry line and pick your cabinet later in software.

The Torpedo Captor X does the whole job onboard. 32 DynIR virtual cabinets built in, plus three more free when you register. A twin-channel static IR loader with 512 memory slots if you'd rather use your own. Twelve reverbs, a three-mode EQ, a noise gate, a compressor, a tuner, and a headphone output with its own level control — which is the feature that makes silent practice actually work, rather than requiring an interface just to hear yourself.

Taming Act Three — Controlling The Sound

A trained horse behaves the same way tomorrow as it did today. That's the whole value of training.

This is the part most guitarists never realise they were missing, because it's the part that was always out of their hands. When your cab gets miked, you don't choose the microphone. You don't choose where it goes. You don't get to hear what front of house is hearing. Every venue is a new roll of the dice.

DynIR takes that decision back. Every DynIR virtual cabinet is captured with eight different microphones — dynamics, condensers and ribbons — and, crucially, you can move them. Continuously, in real time, in front of the speaker or behind it, at whatever distance and off-axis angle you like, with two mics running at once and blendable against each other. Plus a choice of room emulations.

Two Notes' own framing of the scale is worth quoting: you would need a library of around 160,000 perfectly phase-aligned studio-grade IR files to replicate what one DynIR virtual cabinet gives you. That's their claim rather than an independent measurement, but the underlying point holds — Sound on Sound put it more plainly: with ordinary IRs, "if you don't like the mic distance used, you have to swap out the IR for a different one." With DynIR you just move the mic.

What this means in practice. You become your own recording engineer. You find your sound once — an SM57-alike tight on the cap edge for bite, a ribbon further back for body, both blended, in a room you chose — and then you save it and recall it. Six presets from the front-panel knob on the Captor X, 128 via MIDI.

The old way: cab, mic, and whatever the venue's engineer chose. With the Captor X: stereo XLR straight to front of house.

Same guitar sound in your bedroom, in the studio, and through a PA in Ipoh. Every night. That's not a tone feature. That's the training.

Still miking a real cab? Read how to mic a guitar amp.

Torpedo Captor vs Torpedo Captor X

Both do the fundamental job. They diverge on how much of the work happens inside the box.

The honest one-line version. Buy the Captor if you want a superb analog load box and attenuator, and you're happy to do your cab and mic work in software afterwards — it's the cheaper, simpler, and in some ways more flexible route for a recording musician who lives in a DAW. Buy the Captor X if you want the whole rig finished inside the box: headphones for silent practice, recallable presets for the stage, and a cab you can shape without opening a laptop.

Two Notes have since introduced the Captor X+, which adds a true stereo DynIR engine and an adjustable virtual load curve. That makes the Captor X we're holding a run-out model — which, if you were waiting for the price to be right, is exactly the moment to ask us about it.

One Thing To Know Before You Plug In

Five real setups, from quietest to loudest.

One Thing To Know Before You Plug In

Two small pieces of housekeeping, because getting these right is the difference between a happy amp and an expensive repair.

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Two Notes Torpedo Captor — analog reactive load box

• Two Notes Torpedo Captor — 8 ohm
• Two Notes Torpedo Captor — 16 ohm

Two Notes Torpedo Captor X — load box + DynIR

• Two Notes Torpedo Captor X — 8 ohm
• Two Notes Torpedo Captor X — 16 ohm

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About the author

Iqmal

Iqmal is part of the Music Bliss team, writing about guitars, amps, recording and the gear on our showroom floor — and how to get the tone in your head out of the gear you can actually buy.