The Custom 20 circuit is designed for not just the usual Hiwatt sweet cleans but also to get fat, harmonically complex overdrive when driven; the twin EL84 power section handles both as well, and everything in between at usable volumes. A simple, intuitive amplifier which can be pushed into natural compression and overdrive in response to your guitar controls and playing dynamics - the OTHER great Hiwatt sound. For 2025, we have made some revisions to the circuit by adding a Bright switch and an extra gain boost for even more control options. The Bright switch gives you the option for adding sparkling treble to your clean tones at lower volume, or to tighten up gain tones when wound up; the gain boost works with both High and Low inputs and is designed as a natural boost of the amp's voicing, introducing extra harmonic thickness into the preamp. These two controls are interactive, alongside the High and Low impedance input, to offer new and exciting variations on earlier Custom 20 sounds. The Custom 20 Combo is paired with a Fane F25 12" speaker for midrange presence and crunch in a portable format.

Features:

  • NEW Transparent Boost via Push/Pull Gain Pot.
  • NEW Sparkling Cleans via Bright Switch.
  • Chimey, clean, and classic overdrive.
  • Good grind at low volume.
  • Touch sensitive.
  • Lightweight, reliable, and plug-and-play. Ideal volume and footprint for the gigging musician.
  • Independent Hi and Low inputs. Versatile and intuitive, perfect for bringing life out of dark pickups or taming shrill high-end in bright pickups.
  • Simplified controls for quick and effortless tone shaping.
  • Set it and forget it.

Specifications:

  • Wattage: 20W.
  • Inputs: Hi, Low.
  • Outputs: 2 x 1/4" Speaker Outputs.
  • Preamp Valves: 3 x ECC83 (12AX7).
  • Output Valves: 2 x EL84.

Controls:

  • Master Volume.
  • 3-Band EQ — Bass, Treble, Middle.
  • Gain.
  • Push/Pull Gain Boost.
  • Bright Switch.
  • Standby — On/Off.
  • Mains — On/Off.

Impedance: Switchable via Variable Impedance Outputs on the rear panel — 4Ω, 8Ω, or 16Ω.

  • Road Ready — Rugged 18mm Birch-Ply Construction.
  • Band Ready — “Soak Tested” by Custom Shop Technicians.
  • Touring Ready — World Voltage & Impedance Selectors.
  • Based on the original circuit designed by Dave Reeves.
  • Original Partridge-spec English transformers.
  • Meticulously hand-wired to Harry Joyce's military-grade standards.
  • Proudly manufactured in the Hiwatt Custom Shops 🇬🇧.

Special Note B-Stock

  • This item is considered "B-Stock."
  • B-Stock items are new instruments that did not get an A+ in QC.
  • B-Stock is the closest to a new condition. There are very small blemishes categorized as “an inch or less”. Many times, these instruments are like new.
  • They usually have minor cosmetic blemishes; none of these issues will affect overall playability. 

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ConditionB-Stock (Used)
B-Stock items are sold by an authorized dealer or original builder, but have been opened, blemished, or used in some manner.Learn more
Brand
Model
  • SA20C112-25-U
Finish
  • See Description
Categories
Year
  • 2026

Product safety information may be available here.

The Gator Tone

Gainesville, FL, United States
Joined Reverb:2017

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