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Sold: Rock Block 0.5W / 1W Tube Amp (like Z-Vex Nano) with 12AU7 & 12AX7 Tubes

jaymenonjaymenon Frets: 837
edited April 22 in Amps £
£225 delivered (by Royal Mail)

Comes with Hammond (USA) 12AU7 / and Groove Tubes 12AX7 tubes.

0.5 or 1 watt vacuum tube guitar amplifier

Can also be used as a distortion pedal.  

Overdriven output tube distortion at a volume that is perfect for in-home use or recording.  

SPEAKER jack that can drive a 4-16 ohm speaker cab and

OUTPUT TO AMP jack that can drive another guitar amp.

Even when used as a distortion pedal, the signal goes through the output tube and output transformer to an internal dummy speaker load.

- all-tube Class A single-ended triode signal path, which is the most desirable for that classic warm rock guitar sound.  

- Gain, Volume and Tone knobs and a separate Volume knob for the output that drives another amp when the Rock Block is used as a distortion pedal.  

- 3-way Boost and Bass switches, a Power switch, and a Bypass stompswitch

- The Boost switch comes before V1a of the preamp valve (the gain control which comes in between V1a and V1b) and so acts like a boost pedal in front of the amp

- 3 way voice switch on the left side (when used as a pedal)

        Centre: Vintage Sound

        Front: Modern sound

        Back: Metal sound

External 12V DC is supplied to the Rock Block with a universal external regulated switched power supply. The internal supply is a proprietary design that converts the 12V DC to 320V DC. This supply is so efficient that very little heat is generated, and a noisy fan is not needed. The filaments of the tubes are driven directly with the regulated 12V DC supply.

- Tube-swapping, especially the output tube can provide different distortion sounds and volume levels.  The recommended output tubes for the Rock Block are the ECC82/ECC802/12AU7, ECC99 or ECC81/12AT7.  

- ECC99 / 12BH7 provides 0.7 watts of clean power and 1.5 watts maximum power.  

- 12AU7 provides 0.4 watts clean power and 1 watt maximum power.

- 12AT7 provides 0.12 watts clean power and 0.8 watts maximum power.  

The Rock Block is only 3 3/4" by 5 3/4", about the size of an effects pedal, and weighs about 2 pounds.

Video Review Brett Kingman:


My own video:


Sound On Sound Magazine Review

https://www.soundonsound.com/reviews/surprise-sound-rock-block




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