Planning on building a promethium PCB up into an HM-2 style distortion. And I'm looking for some advice on how to replicate my fav HM-2 sound. I have an older Behringer HM300 Heavy Metal that just sounds uglier, more ragged and almost fuzz-like on the lower end than anything I have built so far.
Of the couple of HM-2 style circuits that I have built so far, they use 2n5457 jfets, and a couple of different opamps (usually JRC4558 or TL072) and while they have that characteristic 1k honk that the HM-2 is known for, they never get quite as ugly as this one Behringer that I have. I've tried other HM300's and they don't have the same quality.
the majority of the board on this one particular pedal that I have is smd but, from what I can tell, the through-hole jfet is a 2SK184.
I know that descriptions like "ugly" and "fuzzy" are subjective but any insight that anyone has into the HM-2 design would be greatly appreciated. Thanks!
Of the couple of HM-2 style circuits that I have built so far, they use 2n5457 jfets, and a couple of different opamps (usually JRC4558 or TL072) and while they have that characteristic 1k honk that the HM-2 is known for, they never get quite as ugly as this one Behringer that I have. I've tried other HM300's and they don't have the same quality.
the majority of the board on this one particular pedal that I have is smd but, from what I can tell, the through-hole jfet is a 2SK184.
I know that descriptions like "ugly" and "fuzzy" are subjective but any insight that anyone has into the HM-2 design would be greatly appreciated. Thanks!