Beautiful Ceriatone HRM 50 with Negative feedback switch . Black tolex with Gold Diamond cloth. Great sounding amp.

The Overtone Special HRM is a Ceriatone-massaged version of a certain “D” circuit iteration. These amps are commonly referred to as “HRM”, which is a tip of the hat to hot-rodded British guitar tones. The sound is generally more aggressive than their non-HRM counterparts, especially when the Preamp Boost is engaged.

HRM amps have an internal adjustable tonestack (treble, middle, bass) for the overdrive channel. This allows the player to fine tune gain tone to their liking. Also unique to the HRM amplifier, each channel has it’s own independent Master Volume control.

Like other OTS amps, we have labored carefully to select the finest components to suit the design. As with all Ceriatone amplifiers, it uses our specially designed, custom transformers for superior reliability, frequency response, and feel.
Power Output
50 Watt
Feature Overview
Hi and Lo Inputs
Push-pull Bright switch on Gain control
Mid-boost, Deep, and Rock/Jazz toggle switches
Treble, Middle, Bass equalization (shared between channels)
Overdrive channel with Drive and Level controls
Internal Treble, Middle, Bass tonestack trimmers (overdrive channel)
Push-pull Bright switch on Overdrive Level control
Separate Volume controls for each channel
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 6L6GC
Preamp : 3 x 12AX7/ECC83
Rectifier : Solid State