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FDP Forum / Fender Amps: 1985 - Current / Michael Landau mods on HR Deluxe III



Sep 9th, 2016 11:29 AM   Edit   Profile   Print Topic   Search Topic

Anyone tried to run down exactly what the ML mods are & apply them to an HR DELUXE III?


usa metro detroit

Sep 10th, 2016 10:42 PM   Edit   Profile   Print Topic   Search Topic

I have both amps. Been gigging with the ML HRD for about 10 months

Haven't found the Schematic for the ML HRDeville (I've looked on line several times) So I'd have to visually compare both IC's side by side.. which I haven't attempted.

Outstanding Tone Stack on the ML HRD! This amp has retired my 72 Twin Reverb (Premier Guitar mag said it was better than the Pre CBS 1966 BF Twin Reverb they compared it too which says a lot!)

ML HRDeville vs a standard HRDeville.. the ML has a higher head room which might mean that the PT and OT are different from a standard HRDeville & the negative feedback circuit is probably tighter. I've played normal HRDevilles and they are not as "technique sensitive" as my ML HRDeville is. (The negative feedback circuit i.e. how much the circuit cuts out negative feedback out has a lot to do with sensitivity and the gain/distortion )

Tone stack wise.. normal HRD series amps are based on the Bassman Tone Stack.... Yet, the ML HRDeville is IMO more Twin meets Bassman. I've read Stan Cody the amp's designer working with ML altered the tone stack of a normal Deville's clean channel.

I love my HRD III though... something about the HR Deluxe series has a cool vibe. I play my HRDeluxes almost as much as I play my ML HRD

I've seen where one can do a "global volume mode" on HRD's.

The mod turns the Drive channel into a clean channel and uses the "Drive master" as a master volume for both channels. The More drive function acts as a marginal boost. (this should sound familiar if you use a ML HRD) Maybe get a different rated OT & PT, & tweek the negative feedback circuit of the HRD III. Probably will get you close to a ML HRD just at a lower wattage.. (Just guessing)

I'm going to do this mod on my 2001 HRD when I get a chance. Running a great sounding HRD clean channel... then being able to switch to a pushed clean channel just breaking up, sounds cool. I employ pedals with HRDs anyway (although I like the HRD III drive channel and use it often... )

FDP Forum / Fender Amps: 1985 - Current / Michael Landau mods on HR Deluxe III

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