Crazy Tube Circuits Unobtanium Raw Dual Channel Amp-in-a-Box

Crazy Tube Circuits Unobtanium Raw Dual Channel Amp-in-a-Box/Overdrive Pedal
Product no: 9000-0128-2031 Bax Music Warranty: This product comes with a 3-year warranty.

General

Loaded with NOS Mullard/Valvo OC45 germanium transistors, the Crazy Tube Circuits Unobtanium Raw puts an original spin on the sound of the Klon and Dumble — two truly legendary pedals. This dual-channel amp-in-a-box/overdrive effect pedal shapes slightly rockier sound than the non-Raw edition and lets you use both channels independently or in series. You also get a passive effects loop for integrating your favourite stompboxes and, since this box of sonic tricks runs on 18 Volts, you can count on masses of headroom and an outstanding response. Each unit is painstakingly put together in Greece.

The Unobtanium Raw: From a Transparent Boost to Obscene Overdrive

The right half of the Unobtanium Raw is home to a K-style overdrive circuit with OC45 transistors for surprisingly versatile sound that can be accessed by flipping the stock/OC45 switch. The broad range of the gain control ranges from a transparent boost up to a rough-edged overdrive with lots of headroom and extra sustain, and you also get a mini-switch for toggling between true and buffered bypass. Over on the left, you'll find the D-style amp-in-a-box, which sets you up with a subtle clean boost that can be pushed all the way to lilting, tightened-up overdrive. Here, the Emphasis pot lets you tweak the presence and bass response in great detail, while the mini-switch can be engaged to select SSS mode for organic compression or ODS mode for more gain and more harmonics.

Tips or comments about this product

Please note: This pedal does not include a power supply.

Specifications

Product features

Sustainable product	not specified
Adapter included	no
Type of distortion	clean boost, overdrive
Equipped with tube	no
True bypass	yes
Mini pedal	no
Voltage	9 V
Can be powered by battery	no
Centre positive/negative	centre negative
Power supply plug	barrel 2.1 mm (inner diameter)
Variable voltage	no

Weight and dimensions including packaging

Weight (incl. packaging)	515 gr
Dimensions (incl. packaging)	15,0 x 10,5 x 7,0 cm

Product specifications

Crazy Tube Circuits effect pedal
model: Unobtanium Raw
effect: dual channel amp in a box / overdrive
special version of the Crazy Tube Circuits Unobtanium pedal
two legendary sonic elements combined in one pedal
NOS OC45 transistors in the clipping section instead of standard diodes
option to toggle between standard diodes and OC45 transistors
passive series FX loop for placing other pedals between the two sections
18V internal operations for more headroom and valve-like output
exceptional pick attack response, near infinite sustain when both sections combined
click-less true bypass design via high-quality relay
dark grey moulded housing with light grey ink in old-school font
right side: K-style overdrive based on NOS Mullard/Valvo OC45 Germanium transistors
controls: gain, tone, volume
switches: bypass, buffer / true, stock / OC45
broad gain range: from transparent boost to raw overdrive with high headroom, more gain and longer sustain
active treble control circuit to strengthen or weaken higher frequencies
volume control sets total output and includes an enormous dB boost
toggle switch for selecting original buffer bypass for more clarity and when using longer cables, or true bypass of original circuit
toggle switch for selecting standard clipping/compression or improved gain and headroom/output
left section: D-style amp-in-a-box overdrive
controls: gain, tone, volume
switches: bypass, ODS / SSS
gain control: from clean boost to lilting overdrive with extra punch and clarity
emphasis control sets pre-drive EQ to adjust presence and bass response
tone control sets post-overdrive treble frequencies
volume control sets total output. Corresponds to over-bridge volume or can be used as a clean boost or preamp
toggle switch for flipping between two D-style overdrive circuits
SSS: pure and transparent overdrive with natural organic compression
ODS: higher gain overdrive with enhanced mid-frequencies and harmonic overtones
external footswitch input for toggling amplifier voicing (turns the pedal switch off)
internal trimmers control the EQ and volume boost of the D-style overdrive voicings
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connectors:
- input: 6.35mm mono jack
- send: 6.35mm mono-jack
- return: 6.35mm mono-jack
- output: 6.35mm mono jack
power: 9V DC (not included)
power consumption: 83mA
dimensions: 147 x 103 x 65mm
weight: 521g
made in Greece

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Krzysiek July 24, 2025

Wrote the following about Crazy Tube Circuits Unobtanium Raw Dual Channel Amp-in-a-Box/Overdrive Pedal

Tja, ik heb al een aantal pedaltjes met de zogenaamde Dumbele soud, maar deze dubbeldekker heeft nu precies het geluid die ik in mijn hoofd heb!! Voor een stratocaster is het een must. Ik gebruik dit met een Blackstar st-james 6L6 als en dat is een match made in heaven!!!Als het echt vetter moet met een Epiphone LP En een beetje gain staging bv. Unobtanium>Nobels Or-1X>greer amps lightspeed kan ik een heel breed scala van light gain tot vet oversturde lead tone uit mij versterker krijgen. Kortom deze krijg zeker een 12😉