This 2014 Pete Cornish TB-83X Treble Boost is a hand-built, studio-grade booster from one of the most respected effects designers in the world.

Known for crafting rigs for icons like David Gilmour, Brian May, Mark Knopfler, and Lou Reed, Pete Cornish designs every pedal to military-spec standards with unmatched noise reduction, clarity, and reliability. The TB-83X is his refined, modernized take on the classic late-’60s/early-’70s treble booster—a circuit that helped define the sound of British rock.

This pedals is in excellent condition and it sounds killer.  The warranty seals were opened before the pedal arrived here.  It works perfectly and is unaltered.  This one was originally labeled for Greg Simpson, right below the serial number.

Mahar's Vintage Guitars is a brick-and-mortar and web-based retailer. We are happy to talk with you before you make a purchase.   Please reach out if you feel so inclined! We cross market our items here and on our own site, so items are subject to sale elsewhere at any time (however we will never cancel a sale if it happens here first). See our profile here, our Google reviews as well as our 100% positive Reverb feedback. Also, Reverb limits us to only 25 pictures of our items. There is a good chance we have more. Contact us if you’d like to see them.

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Unlike many vintage treble boosters that can be harsh or thin, the TB-83X offers a thicker, harmonically rich boost with a strong midrange voice, perfect for pushing tube amps into sweet, sustaining overdrive. It adds presence and chime without brittleness, making it a powerful tool for lead work, crunchy rhythm tones, or stacking with overdrives and fuzzes. This example is in excellent condition and remains all original.

Players consistently praise Cornish gear: “The quietest and cleanest booster I’ve used” (The Gear Page), “Pure tone enhancer—no noise, no hiss” (Reddit r/Guitar), “Cornish build quality is next-level” (Harmony Central), “Stacks beautifully with any drive” (Ultimate Guitar), and “Worth every penny for its musicality” (MyLesPaul Forum).

Treble boosters like the TB-83X trace their lineage to classic tones from Brian May, Rory Gallagher, and Tony Iommi, where boosting a cranked amp creates the iconic British overdrive sound.

For more boutique pedals and high-end gear, explore our Two Rock Amplifiers page, Vintage & Used Fender Guitars, or our ever-growing Vintage & Used Effects Pedals page. Every item at Mahar’s Vintage Guitars is tested thoroughly, photographed accurately, and described transparently.

Shipping policy:

Shipments will require signature on delivery, no exceptions.  If there is damage, the buyer must retain all packing materials intact and picture them immediately and send them to .  Less than 1% of our shipments are damaged in transit, and we are committed to making sure your item arrives safely, but we are taking these additional measures to make sure you are happy with your purchase.