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This is a brand new item, unused, and in original packaging. Z String Music is an authorized seller of Quilter products.

Product Info from Quilter:

The SuperBlock UK packs three classic amplifiers into the most extensible system you can fit on your pedalboard. Featuring JMP, AC Normal, and AC Top Boost voicings, the SuperBlock UK has all of your classic UK amp needs covered. For the first time, we are excited to offer all of tonal secrets in a pedal format along with our first AC voicings.

Fitting into a slot about the size of a double width pedal, the SuperBlock fits the power of a 25 watt tube amp right on your pedalboard when powered by our PS-24. For quieter applications you can also power it with a conventional 9v power supply for 1 watt of power. Features include two Cab Sims and an FRFR mode on the XLR Out and headphone out, three classic voices, Limiter, Reverb, and an effects loop.

  • Up to 25 watts
  • 3 Classic Voices
  • 3 band EQ (Bass/Mid/Treble)
  • Gain
  • Limiter
  • Reverb
  • Effects Loop
  • Cab Sim
  • Headphone Out


Primary Controls

    • GAIN adjusts the distortion from clean to overdrive.
    • LIMITER reduces gain just enough to prevent overdrive, and then restores gain as the note dies away.
    • 3-BAND ACTIVE EQ Boosts and cuts Bass, Mids, and Treble frequencies.
    • 3-Voice Switch: 1979 JMP, AC Norm and AC TOP Boost voicings.
    • Cab Sim Switch

Effects Controls

    • EFFECTS LOOP send and return jacks.
    • REVERB

Volume Controls

    • MASTER controls power amp volume as well as LINE OUT volume.

Electronic Performance

Input ¼" mono, 1M input impedance
Effects Loop 1V full scale, 1K Send impedance, 47K Return impedance
Line Out Balance XLR output


AC Power Requirement 24 Volt Power Supply (included)
Power Requirement for reduced power 9V - 300ma
Power Output 25 Watts 8 ohms (4-16 ohms okay)


HxWxD 4.25" x 6.5" x 1.5" ( 10.8cm x 16.5cm x 2.5cm)
Weight 1.35 lbs (0.61 kg)