Folks, I assembled the Pass DIY class A kit, building two units each used in balanced mode. I'd really like to build a Pass designed preamp but require balanced inputs and outputs. Based on my somewhat simplistic understanding of balanced operation I figure one could use two stereo preamps with the two channels used for the Positive and Negative signals with a common gnd. This would be somewhat cumbersome to operate but no different from two mono preamps.
My apologies if this issue has been addressed before and please feel free to inform me of my ignorance.
Regards, steve
My apologies if this issue has been addressed before and please feel free to inform me of my ignorance.
Regards, steve
Easiest Way - 2 irons per Channel.. Before buffer for debalancing. After for balancing. Galvanic isolation for free...
it's always best having proper differential stage than two SE ones working in antiphase and being completely unaware of each other
Just curious, what do you use for a Volume control in a balanced system ?
Most studio gear is SE internally with transformer coupled I/O for common mode isolation. Most of the work I've done with balanced circuits was inside of analog oscilloscopes. Not really the same as balanced audio.
Most studio gear is SE internally with transformer coupled I/O for common mode isolation. Most of the work I've done with balanced circuits was inside of analog oscilloscopes. Not really the same as balanced audio.
B1 Balanced
Sorry. Let's try this one
Sorry. Let's try this one
An externally hosted image should be here but it was not working when we last tested it.
Attachments
in principle , it should work
though, I always avoided stacking CCS-es, so can't say how stable is going to be
try, and report
though, I always avoided stacking CCS-es, so can't say how stable is going to be
try, and report
Balanced B1
Second option would be with I/O transformers and without the current source. No risk (I have no measuring stuff but a multimeter) but it's more expensive (100$ each, 2 per channel). 🙁
Second option would be with I/O transformers and without the current source. No risk (I have no measuring stuff but a multimeter) but it's more expensive (100$ each, 2 per channel). 🙁
