← Back to Shop
This product is proudly handwired in the Hiwatt Custom Shops HANDWIRED

DR20/0.5 Head - The Little Rig

Custom Hiwatt 20/0.5W Amp

The legendary Hiwatt preamp circuit and tonestack found in the DR103/504 feeding a 20W (switchable to 0.5W) output section offers classic Hiwatt Headroom, clarity, instantaneous response, sonic depth, and detail, with breakup at recording and club volumes (switch to 0.5W in the greenroom).

Iconic 60s British tone in a lightweight and portable package.


  • — Original linked input circuit as famously modded for Pink Floyd, increasing signal to the V1 preamp valve and producing a fuller, more present and forward sound.
  • — Optional "Fat Switch" mod for a fuller tone with extended low-end range and increased volume.
  • — Normal and Brilliant channels. Versatile and intuitive, perfect for bringing life out of dark pickups or taming shrill high end in bright pickups.
  • — Volume for any gig — Switchable wattage allows switching from 20W down to 0.5W for bedroom playing and smaller venues.


wattageSwitchable — 20W or 0.5W
channelsNormal, Brilliant
  • Normal
  • Brilliant
  • Linked
2 x 1/4" Speaker Out
preamp valves4 x ECC83 (12AX7)
output valves2 x EL84
  • Normal Volume
  • Brilliant Volume
  • 3-Band EQ shared by both channels — Bass, Treble, Middle
  • Presence — Treble Boost shared by both channels
  • Master Volume
  • Standby — On/Off
  • Mains — On/Off
impedanceSwitchable using Variable Impedance Outputs on the rear panel — 4 Ω, 8 Ω, or 16 Ω
height210mm (~9")
width497mm (~20")
depth250mm (~10")
weight9.6 Kg (~22 lbs)
  • Road Ready — Rugged 18mm Birch-Ply Construction
  • Band Ready — ’Soak Tested’ by our Custom Shop Technicians
  • Touring Ready — World Impedance Inputs
  • Based on Hiwatt’s original circuit designed by Dave Reeves.
  • Original Partridge spec English transformers.
  • Meticulously hand-wired to Harry Joyce’s exacting military standards.
  • 🇬🇧 Proudly manufactured in the Hiwatt Custom Shops.