So I'm tired of the sound of my IC based summing bus/output section on my console. I'm trying to build one purely for sound quality. I am not an electrical engineer or designer, but can read schematics, and am a bit crafty. Right now I'm not worried about the meters or solo working, just getting the sound through proper 1st....
...so I've taken John Hardy's summing schematic from his 990 application notes & married it to Jensen's high quality output section schematic, but something is wrong. The sound gets distorted after 5 seconds (maybe an oscillation?) and there is a lacking of low end. Sounds like a high pass filter rolling off at around 150Hz or so. I don't have a sweep oscillator. I believe the high pass filter problem is in the last 990 schematic, as I've ran an insert in here and am losing the low end.
Here's the schematic of one channel of the bus:
I put the fader between the two schematics. Anyone have any idea what is going wrong just by looking at this schematic?
I'm running the 990C's off of a 24v dedicated power supply just for the bus.
I searched for a summing schematic with proper output section but I only found IC designs.
Regards,
Scott
...so I've taken John Hardy's summing schematic from his 990 application notes & married it to Jensen's high quality output section schematic, but something is wrong. The sound gets distorted after 5 seconds (maybe an oscillation?) and there is a lacking of low end. Sounds like a high pass filter rolling off at around 150Hz or so. I don't have a sweep oscillator. I believe the high pass filter problem is in the last 990 schematic, as I've ran an insert in here and am losing the low end.
Here's the schematic of one channel of the bus:
I put the fader between the two schematics. Anyone have any idea what is going wrong just by looking at this schematic?
I'm running the 990C's off of a 24v dedicated power supply just for the bus.
I searched for a summing schematic with proper output section but I only found IC designs.
Regards,
Scott