The Ceriatone Overtone Special “183” 100 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.

Note: PPIMV mounted on Front Panel will be either mounted in place of pilot lamp (Marshall styles) or a hole will be drilled (OTS styles).
          PPIMV mounted on Rear Panel will always be in place of a Speaker Output Jack.


Power Output   100 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

4 / 8 / 16 Ohm Selectable

Dual Speaker Outputs

External Bias Adjust


Power : 4 x EL34

Preamp : 3 x 12AX7/ECC83

Rectifier : Solid State

OTS "183" 100 Watt Configuration Options:

  • Chassis I - $1,141.50
    (Fully working chassis w/ footswitch. Tubes and cabinet not included.)
  • Chassis II - $1,258.50
    (Fully working chassis w/ tubes and footswitch. Cabinet not included)
  • Amp Head I - $1,373.50
    (Fully working chassis installed in a head cabinet w/ footswitch. Only tubes not included.)
  • Amp Head II - $1,490.50
    (Fully working chassis w/ faceplate and tubes installed in a head cabinet. Includes footswitch.)
  • Amp Head w/ C-lator Built In - $1,776.50
    (Fully working chassis w/ footswitch installed in a head cabinet with a C-lator. Tube driven Effect Loop Buffer built into the cabinet.)
  • 112 Combo Amp I - $1,466
    (Fully working chassis w/o tubes installed in a 1x12 combo cabinet w/ footswitch. Speaker not included.)
  • 112 Combo Amp II - $1,583
    (Fully working chassis w/ tubes installed in a 1x12 combo cabinet w/ footswitch. Speaker not included.)

Main photo is for illustrative purposes only and pricing is for Chassis I. Photos may include options that are not included if you order the standard version of the amp or don't order all options available. We also may not offer all options available and/or shown in main illustrative photos. Photos are of products assembled by Ceriatone. We no longer sell kits. You must order all kits direct from Ceriatone Malaysia. Ordering options for your amp may add several days to the build/lead time.

Ceriatone amps are Custom-built, hand made, hand wired amps, built to order. There is meticulous attention to detail that is second to none, and no shortcuts are taken. Each amp is 100% hand built, hand wired point to point, and then is thoroughly tested and burned in before it is shipped to you. For this reason it takes approx.6-8 weeks for your amp to be built and shipped. Options can add 1-2 weeks to the "standard" build time.

Prices shown on includes the shipping cost to the USA only. We only ship to the USA, Canada and Mexico. Shipping to Canada, Mexico, Puerto Rico and the US Virgin Islands will have additional shipping. We'll invoice the difference in shipping and it is due at time the order is placed.

Note: We ONLY ship to PayPal verified addresses if paying via PayPal. No exceptions.

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OTS "183" 100 Watt

  • $1,141.50

Available Options

Tags: ceriatone, guitar amp, overtone special 183, ots, dumble