The XT Unobtanium is a buffer and booster from Crazy Tube Circuits, the Athens-based pedal maker. The maker describes it on its product page as a "studio grade buffer / booster", meaning it combines two jobs in one unit: a buffer, which preserves your guitar's high end and dynamics through long cable runs and a crowded pedalboard, and a boost, which raises the signal level to push an amp or overdrive harder or lift a part above the mix.1
What it does for your signal
As a buffer, the XT Unobtanium addresses the tone loss that builds up when a passive guitar signal passes through cables and multiple buffer pedals. As a boost, it sits alongside the maker's other gain-staging pedals, and boost in general is covered on the site's Boost Pedals page. Crazy Tube Circuits' own wording for the pedal is "studio grade buffer / booster !!", which is the maker's description of its sound quality rather than a reviewer's.1
Price and availability
The pedal is listed on the Crazy Tube Circuits webstore at an original price of €49.00, with a sale price of €41.00 shown alongside it.1 A second store listing shows the price as €49.00.2
The pedal is listed as sold out on the maker's webstore as of 25 October 2026. The store also lists an "XT Unobtanium (B-Stock)" version, a variant of the same pedal, with availability shown as "ships in 5-6 days".12
Where it sits in the Crazy Tube Circuits range
Crazy Tube Circuits builds several other boost-adjacent pedals that share the XT Unobtanium's job of shaping level and drive: the Super Conductor, a four-in-one analog boost, and the Vyagra Boost, which the maker has updated with boost, EQ, buffer, envelope filter and wah uses. The Magnifier is listed on the same store pages as the XT Unobtanium.12
Videos
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Questions
What does the Crazy Tube Circuits XT Unobtanium do?
It is a buffer and booster. A buffer keeps your guitar's signal strong through long cable runs and crowded pedalboards, while a boost raises the signal level, either to push an amp or overdrive harder or to lift a solo above the mix. Crazy Tube Circuits describes it as a studio grade buffer and booster.
Is the XT Unobtanium a buffer or a boost?
It is both. Crazy Tube Circuits lists it as a buffer and booster in one unit, so it can serve as a always-on line keeper at the end of a pedalboard chain and as a clean level lift when you need it.
Is the XT Unobtanium sold out?
Yes. The pedal is listed as sold out on the Crazy Tube Circuits webstore as of late October 2026. The store also lists an XT Unobtanium B-Stock version, with availability shown as shipping in 5 to 6 days.
Sources (2)
- XT Unobtanium (B-Stock), Crazy Tube Circuits
- XT Unobtanium, Crazy Tube Circuits
