Nemphasis X7 Tube Overdrive review

Valve-driven overdrive stompbox

  • £149
The X7 Tube Overdrive has a 12AX7 valve at the center of its design

MusicRadar Verdict

Ace overdrive! It seems that, sometimes, only a valve will do...

Pros

  • +

    Valve-driven overdrive tones. Plenty of gain. Singing harmonics.

Cons

  • -

    Should include a power supply.

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The Nemphasis X7's wedge-shaped housing comes complete with vents on the side to aid heat dissipation from its single valve, but isn't so bulky that it takes up too much 'board real estate.

"Bring in the gain knob and the saturation builds for rich, fat distortion with singing harmonics aplenty"

There's no clean boost - with gain right down and level at about one o'clock, it adds a raunchy second channel to your clean sound with plenty left in reserve for volume jumps.

Bring in the gain knob and the saturation builds for rich, fat distortion with singing harmonics aplenty, delivered via a tone control that zeroes in nicely on the amount of throaty upper-mid and top-end presence that you desire. Nicely touch sensitive, too.

While there are shedloads of solid-state pedals that promise the sort of overdrive you'd get from a valve amp, there are far fewer that offer a valve as part of the circuitry, so it's always good to see a new one, especially one that's as much of a pleasure to play through as this. There should be an included a power supply, though.

Trevor Curwen has played guitar for several decades – he's also mimed it on the UK's Top of the Pops. Much of his working life, though, has been spent behind the mixing desk, during which time he has built up a solid collection of the guitars, amps and pedals needed to cover just about any studio session. He writes pedal reviews for Guitarist and has contributed to Total Guitar, MusicRadar and Future Music among others.