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20W Valve Circuitry Perfect For Gigging
The SZTUBE-20 is a mighty amp that can be used for rehearsals and live performances.
Kicking out an impressive 20W of power with full valve circuitry; this unit provides tone and high fidelity, with an extended dynamic range.
The SubZero Tube-20 features 3x 12AX7 Ruby Tubes for the pre-amp, and 2x EL84 Ruby Tubes
for the output amplification, giving a classic sound and a broad tonal range that is suitable for rock, indie and blues musicians. Plug your guitar into the SZTUBE-20R for unique sounds that will fill the stage.
Versatile Tones At Your Fingertips
The SubZero Tube-20R Guitar Amp provides complete control and versatility over your sound, with separate clean and boost channels and 3-band EQ.
Rock and blues players will be in their element with an amp that produces shimmering clean sounds which can then be transformed into gritty blues infused tones with a flip of
the drive boost switch, perfect for instantly beefing up choruses during jam sessions and live playing.
This amp initially offers a clean tone when played softly, with gain adjustment for a basic, clear sound that is ideal for a retro tone as well as ambient licks.
The included tubes ensure the tone of this amp is full-bodied and offers an unmatched rounded sound. The added drive boost button means you can drive an even grittier sound without pushing your guitar or overall volume.
With the distortion selected you can take your sound to limit, with master and gain controls.
Incredibly expressive and a sound unique only to the SZTUBE-20R, this valve amp is truly an extension of the guitar itself with a singing clean tone and impressively musical overdrive.
The inbuilt 3-Band EQ also gives you further control, with dials that allow you to adjust the bass, middle and treble.
The SubZero Tube-20R Guitar Amp also boasts onboard spring reverb, that utilises a coil-like effect for a true vintage resonance that can be fully adjusted at the turn of dial.
Compact, Vintage Casing with 12" Celestion Speaker
Housed in a sleek vintage-style casing that matches its classic sound, the Tube-H20R features a blue Tolex finish and retro grey grille cloth.
The reduced dimensions and lightweight construction also makes transporting and setting this amp up both easy and convenient. The SubZero Tube-20R also comes loaded with a Celestion Seventy 80 speaker, which offers a punchy, aggressive upper mid range, tightly controlled low end, and a subtly increased top end.
Features
- Set of Ruby Tubes
- Clean gain dial for vintage tone with minimal distortion
- Distortion switch with independent volume and gain levels
- 3-band EQ with middle, treble and bass dials
- Onboard spring reverb effect
- 12 Inch Celestion Seventy 80 Speaker
- Compact unit easily transported for gigs and home use
Specifications:
- Power Output: RMS 20W minimum into 8 Ω @5 THD, 1KHz
- Input Impedance: 1M Ω
- Speaker: 12" Celestion Seventy 80 Speaker
- Controls: Gain, Boost S/W, Treble, Middle, Bass, Volume (Master), Reverb
- Dimensions: W 460MM x H 420mm x D 235mm (18" x 16.5" x 10.6")
- Tubes: 2 x 6BQ5(EL84), 3 x 12AX7 Ruby
- Construction material: MDF

The latest in music technology, for modern musicians and producers. SubZero combines innovation and quality, with the determination to help you get the sound you want. From studio and guitars, to powerful PA systems and home audio setups - SubZero is all about cutting-edge audio.