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Pigtronix PXBST Class A Boost Instrument Preamp Pedal


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  • Class A J-Fet transistor signal boost pedal for line and instrument level signals
  • Adds up to 20dB signal gain boost without introducing noise or distortion
  • Simple control layout that consists of a single gain knob
  • Diminutive chassis size allows the pedal to slot into any set-up discreetly
  • True Bypass enabled to preserve your original signal
  • Works brilliantly alongside other pedals
  • Compact chassis allows for an easy fit on your pedalboard
  • Includes 18VDC 300mA supply
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Delivery & Returns

Delivery to UK mainland addresses* is FREE on orders over £75 and up to 30kg. (As a guide, a standard electric guitar weighs approx. 3-5kg).

Delivery on orders below £75 are charged at £4.45!

Delivery to Northern Ireland, the Scottish Highlands & Islands, Isle of Man, Isle of Wight, Channel Islands and the Republic of Ireland. is weight dependant and will be indicated at the checkout

Delivery above 30kg to ANY location will vary according to weight and will be indicated at the checkout

LocationPriceStandard Delivery
UK mainland*FREE on orders over £75 £4.45 on orders under £751-3 working days
Northern Ireland, Scottish Highlands & Islands Isle of Man Isle of Wight Channel Islands Republic of Ireland£12.95 – any order value up to 30kg Over 30kg - please call1-3 working days
OverseasPlease call for detailsPlease call

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The Pigtronix PXBST Class A Boost Guitar Effects Pedal injects line or instrument level signals with the appropriate boost to be heard, without introducing unwanted noise or distortion into the signal. Designed with a single control knob that attenuates the "Class A" J-Fet transistor, giving your guitar's sweet tones a lift couldn't be easier or smoother.


As noted above, the control layout consists of a signal Gain pot, which allows you to subtly lift your guitar's natural tones beautifully. The real magic happens inside the pedal, unseen yet not unheard. Whether you have active or passive pickups (and even line level signals are included in this), the Class A Boost pedal can pump up to 20dB without ever clipping your signal. There is a perfectly flat frequency response from 20Hz to 20kHz, so you can rest assured that even the most delicate nuances of your tone is preserved with the utmost transparency.

Plays well with others

The beauty of the Class A Boost's noiseless performance allows you to pop it anywhere you choose in your signal chain. If you place if after your favourite overdrive pedal, you can boost that beautifully before it slides into your recording equipment, live PA mixing desk, or into your amplifier, for an unbelievably cool, crisp, overdrive with just the right level of saturation. If you want to push the pre-amp stage of your tube amp, crank up the Class A Boost before it hits your amp input, then you can attenuate your amp's preamp to find your sweet spot.

The Pigtronix PXBST Class A Boost Guitar Effects is small yet perfectly formed, sitting at a discreet 25 x 61 x 112 mm, allowing it to slot easily into the most complex of pedal board arrangements. Adding a reliable boost pedal to your arsenal may not seem as glamourous or exciting as a new delay unit, distortion pedal, reverb, etc., but for those who have a boost pedal – perhaps even saved a life when they’ve experienced that heart-stopping moment when a tube amp dies five minutes before you hit the stage -, they are an undervalued and highly useful piece of gear.

Preserving tone whilst delivering a signal boost of up to 20dB is no easy task, yet the guys at Pigtronix make it seem so with the superb Class A Boost Guitar Effects Pedal. All you need is the included 18V power supply and you're all set.

ModelPXBST Class A Boost Instrument Preamp Pedal
Dimensions (H x W x D) 25 x 61 x 112
Controls Gain
Included Accessories 18VDC 300mA power supply
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