So, my Quinn SDO (Skyglider II with "Mr.H" post od tone circuit) has been sounding a little buzzy at lower rehearsal volumes (amazing at higher volumes), so I attempted again to adjust the internal HRM trim pots. I thought I had pretty much nailed it the first time, but NO. This time, I moved to the room that was giving me all the problems and made sure not to turn up too loudly...'cuz almost everything sounds good loud!
Ended up turning the HRM highs completely OFF (i.e. least high end). The bass ended up just slightly above the least bassy setting, right at the point where it took a jump from almost nothing to a nice full sound, but without any mushiness...tight and full. The mids were most interesting. Twisted the pot through the whole range to see what I was working with and went through my main OD settings to make sure the ones of most interest were focused on. Ended up starting at full ON (which is harsh) and slowly decreasing it till the harshness just disappeared. This was VERY dependent on overall gain, so I made sure to adjust it at the highest gain setting ever used, seeing that lower gain settings smoothed out on their own.
Brought the amp back to my normal practice room and played to some cranked music (about the rehearsal volume) and WOW, what a difference! Completely different amp! Completely smooth and fat, but with that classic bark and "explosion" of sustain and distortion common to the HRM platform when you dig in. Turning it up louder just made everything even better! I didn't measure resistances, but will do so next time I'm in the amp.
The HRM is really, really tricky!!! How are you adjusting yours?
Ended up turning the HRM highs completely OFF (i.e. least high end). The bass ended up just slightly above the least bassy setting, right at the point where it took a jump from almost nothing to a nice full sound, but without any mushiness...tight and full. The mids were most interesting. Twisted the pot through the whole range to see what I was working with and went through my main OD settings to make sure the ones of most interest were focused on. Ended up starting at full ON (which is harsh) and slowly decreasing it till the harshness just disappeared. This was VERY dependent on overall gain, so I made sure to adjust it at the highest gain setting ever used, seeing that lower gain settings smoothed out on their own.
Brought the amp back to my normal practice room and played to some cranked music (about the rehearsal volume) and WOW, what a difference! Completely different amp! Completely smooth and fat, but with that classic bark and "explosion" of sustain and distortion common to the HRM platform when you dig in. Turning it up louder just made everything even better! I didn't measure resistances, but will do so next time I'm in the amp.
The HRM is really, really tricky!!! How are you adjusting yours?