Overtone Special “183” 50

  • 50 Watt

The Ceriatone Overtone Special “183” 50 is a clone of a very unique “D” amplifier that marked the transition from high-plate non-HRM amplifiers to the HRM topology that featured EL34s.

If you’re familiar with the circuit design of “D” amplifiers, you’ll notice how…err…different #183 is.  With it’s EL34 power tubes, lack of negative feedback on V1B, barely-there snubber caps on V2, and other departures...183 gives a glimpse into the tonal evolution of one of the most legendary amp builders.

Tonally, 183 sits somewhere between the fatness of the high-plate Skyline and the clarity and harmonic smear of the HRM.  Yeah, we know how esoteric that sounds.  You’ll understand when you play it.

As with all Ceriatone amplifiers, we’ve obsessed over component selection, and it uses our specially designed, custom transformers for superior reliability, frequency response, and feel.

Power Output 50 Watt
Feature Overview
  • Normal and FET input (with corresponding internal gain adjustment)
  • Bright, Deep, and Rock/Jazz toggle switches
  • Treble, Middle, Bass equalization (shared between channels)
  • Overdrive channel with Level and Ratio controls
  • Master volume and power amplifier Presence controls
  • Footswitch (Channel and Preamp Boost)
  • Rear panel OD Trim (fine tunes response of overdrive channel)
  • Passive effects loop
  • Full/Half Power switch
  • Tubes
  • Power : 2 x EL34
  • Preamp : 3 x 12AX7/ECC83
  • Rectifier : Solid State
  • Head Complete Head Unit USD 1,345.00 25.0kg Full working chassis in head cabinet. Footswitch included
    Options Without tubes USD 1,255.00 25.0kg Full working chassis without tubes in head cabinet. Footswitch included
    Without head cabinet USD 1,125.00 17.0kg Full working chassis without head cabinet. Footswitch included
    Without head cabinet and tubes USD 1,035.00 17.0kg Full working chassis without tubes and head cabinet. Footswitch included
    Complete Head Unit with Clator Built In USD 1,645.00 27.0kg Full working chassis in head cabinet with C-lator built in. Footswitch included
    Combo Complete Combo 1x12 Unit USD 1,400.00 35.0kg Full working chassis in combo 1x12 cabinet, sans speaker. Email us to enquire on speaker choice.
    Overtone Special "183" 50 Kits Package 1 USD 495.00 8.0kg All components with assembled board, faceplate, and chassis. Only OT, PT, choke, tubes and head cabinet not included. Footswitch included.
    Package 2 USD 715.00 17.0kg All components with assembled board, faceplate, chassis, choke, OT and PT . Only tubes and head cabinet not included. Footswitch included.
    Package 1 with assembly USD 815.00 8.0kg All components with assembled board, front plate, rear plate, and fully assembled in chassis. No OT, no PT, no choke, no tubes and no cabinet. Footswitch included.
    Board Assembled board USD 220.00 3.5kg Eyeleted, Sprague PS caps, RN65D and CF resistors, Teflon wired
    Cabinet Head USD 220.00 22.0kg Weight is for empty head cabinet only.Option to include C-lator cut out.
    Combo 1 x 12 cabinet USD 275.00 35.0kg Price and weight is for empty combo cabinet, without speaker. Email us to enquire on speaker choice.
    Chassis Steel USD 70.00 4.5kg Laser Punched Steel, Thickness 1.5 mm
    Faceplate Front plate USD 28.00 1.5kg Aluminum Panel, Reversed Silk Screened. Laser Cut and Punched, Black Color
    Rear plate USD 28.00 1.5kg
    Trannies Power & output trans & choke USD 220.00 11.0kg
    Tubes 3 x 12AX7, 2 x EL34 USD 90.00 3.5kg
    Layout Overtone Special "183" 50W Download
    Manual Overtone Special "183" 50W Download