Ok, I know what Overtone Special "183"  is and Overtone Special Ford Mustang as well.

...but I don't know what Overtone HRM MK2 is all about.


Anybody knows?

I've always thought it a rather curious, odd thing that Nik does not provide any descriptions of any of his amps , on the Ceriatone website. What's with that?

Only it has no reverb. Why has Nik chosen to not add verb any of his amp. What happened to the SSS Nik was working on, anybody know the real scoop on any of these new models?

 Point taken. I guess I'm getting fed up with having to lug all the gear it takes to make time based effects work I like the results although (I've never been more happy with my rig, ever!). From a grab and go stand point Had wasn't to keen on craming the amp with features. Probably because he catered to pro guitar players that had roadies.  Most of his models were available with verb although: The SSS, Dumbleland special (150w), Overdrive reverb, 300sl. Overdrive 150w.

The Ford Mustang is a clone of Robben Fords amp, well more accurately it's a clone of a clone - the cloned amp in question being a Bludodrive Ojai. The most obvious change is in the Presence circuit (Global Negative Feedback) which contains a 2.2 uF capacitor. This will change the tonal characteristics of the amp and give a different range of operation to the Presence control. More brightness available.

The 183 is an Overdrive special with serial number 183. It was an EL 34 based amp that was bought by a well known Gear Page forumite for a lot of cash ($50,000 has been mentioned); and he paid a US based amp builder to clone it. I think that he then sold the original amp. The 'guts' of both of these amps have been 'shared' and discussed on the ampgarage forum although there is a fair amount of disquiet over Niks use of this information - I'll stay out of that discussion.

I'm not sure about the HRM MK 2, It's a revision on the HRM so it could just be Mark 2. The Emmy Pro is a well known Two-Rock take on the Overdrive Special HRM so there is a chance that it is based on that. I haven't looked too closely at the revised diagram, the comments state that the LNFB has been removed from V2 which will give a bit more gain / loosen up the feel a bit.

Here is a clip where ODS #183 is played side by side with the Clone made by Quinn Amps



The clone is on the left hand side and played first.

I have a rack pre-amp coming from Shad @ Quinn amps of "183" with ftsw'able FET to run with the D-lator/Pwr amp of my Bluesmaster. It will have some NOS parts.I'll have it in a month of so.I'll report when i get it,followed by clips.  It would be cool to compare it to a Ceriatone 183.

@mcinku, I read somewhere that the MKII is supposed to be a Two Rock amplifier, probably the Emerald Pro, which is often nicknamed an "Emmy".