Thanks Generg for advice. I`ve already set up offset in a few millivolts. Sound is incredibly clean after adjustment harmonics
So, if I put my L-pad network on one channel in front of the Ba-3 then it would want to match a 47K impedance, right?
Here's what I've come up with. Is it correct?
Attachments
Try using different lenght of speaker cables, that will probably do the job.
At the moment I have 3 m in the left side, and 5 m in the right, that shifts the vocals to the left.
Best regards
Arthur.
At the moment I have 3 m in the left side, and 5 m in the right, that shifts the vocals to the left.
Best regards
Arthur.
Dont think 6 ft of cable is going to off-set your balance. Look at the room or component gain per channel.
Room treatments: Acoustic Weave - White - Paperforms
Using these in a room improved the sound significantly. A combo of reflection and absorption is probably needed.
Room treatments: Acoustic Weave - White - Paperforms
Using these in a room improved the sound significantly. A combo of reflection and absorption is probably needed.
I am amazed at how the room is influencing channel balance.
I have long speaker cables of uneven length. About 20 feet and 25 feet. I swapped them, doesn't make a difference. I also cranked up the preamp/amp all the way w/no source connected (mild hiss), when tested with a voltmeter AC levels were the same on both channels.
I swapped speakers. Same imbalance to same side.
Finally, I built a Lpad network land intalled it in one channel of the preamp. 2 resistors on the preamp rca out. It's working to even out the imbalance.
My room is odd (see attached). It's funny, as my system gets better I really am noticing the influence the room is having. The "sweet spot" is really small which makes any imbalance left or right really noticeable. Before I padded one preamp channel the imbalance was about 3 feet from center. The speakers are 10 feet apart. That is a lot of room influence.
I have long speaker cables of uneven length. About 20 feet and 25 feet. I swapped them, doesn't make a difference. I also cranked up the preamp/amp all the way w/no source connected (mild hiss), when tested with a voltmeter AC levels were the same on both channels.
I swapped speakers. Same imbalance to same side.
Finally, I built a Lpad network land intalled it in one channel of the preamp. 2 resistors on the preamp rca out. It's working to even out the imbalance.
My room is odd (see attached). It's funny, as my system gets better I really am noticing the influence the room is having. The "sweet spot" is really small which makes any imbalance left or right really noticeable. Before I padded one preamp channel the imbalance was about 3 feet from center. The speakers are 10 feet apart. That is a lot of room influence.
Attachments
Just finished my BA-3 preamp. Chassis, knobs, transformers, pretty much everything recycled from previous projects.
I used Salas BIBs for voltage regulation and 47R for R13, as I did not need so much gain.
Regarding sound now, initially with P3 in mid position sounded a little harsh. Used Arta to adjust it and got to 0.018 THD. I could get lower, but left it there for the time. It' s more balanced now and I quite like the sound.
I used Salas BIBs for voltage regulation and 47R for R13, as I did not need so much gain.
Regarding sound now, initially with P3 in mid position sounded a little harsh. Used Arta to adjust it and got to 0.018 THD. I could get lower, but left it there for the time. It' s more balanced now and I quite like the sound.
Attachments
Yes, now driving TSSA.
My transformer is 100VA 2x30V, so I needed the voltage drop!
Buzz, as I quite like the BA-3 I may try it balanced, but it's going to be bigger project than this. I had most of the parts and tried to do something with them.
Also no balanced source or amps for the time being.
My transformer is 100VA 2x30V, so I needed the voltage drop!
Buzz, as I quite like the BA-3 I may try it balanced, but it's going to be bigger project than this. I had most of the parts and tried to do something with them.
Also no balanced source or amps for the time being.
) - which stacking arrangement you prefer with that AVC and - exactly in which configuration (preceding stage , next stage )