Matching tends to count most when you edge toward high levels of output and the stressing through massive transients in a mixed harmonic, well, the micro distortions become macro and then you pop an output transistor or two.
In the rest of the given listening times, the created distortions from minor mismatching are generally masked to anything but electronic distortion analysis.
To check on that, one can look at amplifier and device reports from reviewers at stereophile and then note when John Atkinson finds anomalies or high distortion in one channel or mono block, vs it’s given compliment.
The distortions from sets of matched transistors in given amplifiers that you may encounter, in the manner that you seem to be dealing with...will probably be less than what the reviewers and John Atkinson have run into, those given odd times.
Matching at the levels you are looking at are more than likely will be within or below your given hearing threshold, regarding hearing discrepancies.
Again, it mostly comes out as a problem only under extreme stressing. Ideally perfectly matched transistors will all blow simultaneously(never gonna happen) but in the real world, one pops - the one odd man out, even if just out by a hair... and then takes the amp down with it. (these days we can check that under extreme loading and using a $300 thermal camera)
It sounds like you might be able to pull your transistors and check on them and match them better among themselves, if you find some minor discrepancies. The way you speak is that soldering is not a stranger to you.. and you can use a basic multi-meter, and that includes some basic transistor matching via said meter.
I’ve done the same in repairing audio amplifiers, ie, need 12 devices, buy 16-20, and use the best matched 12 out of the group (all same batch)....and leave it at that.
The best you can do is primitive matching (which is usually adequate, except for our audiophile anal fretting about ’best’ and whatnot), unless you’ve got a curve tracer.
Check for other alterations in the circuitry, base resistors and voltage/current drive in the predriver in the monoblock may be different, and so on. Look very very closely.
In the rest of the given listening times, the created distortions from minor mismatching are generally masked to anything but electronic distortion analysis.
To check on that, one can look at amplifier and device reports from reviewers at stereophile and then note when John Atkinson finds anomalies or high distortion in one channel or mono block, vs it’s given compliment.
The distortions from sets of matched transistors in given amplifiers that you may encounter, in the manner that you seem to be dealing with...will probably be less than what the reviewers and John Atkinson have run into, those given odd times.
Matching at the levels you are looking at are more than likely will be within or below your given hearing threshold, regarding hearing discrepancies.
Again, it mostly comes out as a problem only under extreme stressing. Ideally perfectly matched transistors will all blow simultaneously(never gonna happen) but in the real world, one pops - the one odd man out, even if just out by a hair... and then takes the amp down with it. (these days we can check that under extreme loading and using a $300 thermal camera)
It sounds like you might be able to pull your transistors and check on them and match them better among themselves, if you find some minor discrepancies. The way you speak is that soldering is not a stranger to you.. and you can use a basic multi-meter, and that includes some basic transistor matching via said meter.
I’ve done the same in repairing audio amplifiers, ie, need 12 devices, buy 16-20, and use the best matched 12 out of the group (all same batch)....and leave it at that.
The best you can do is primitive matching (which is usually adequate, except for our audiophile anal fretting about ’best’ and whatnot), unless you’ve got a curve tracer.
Check for other alterations in the circuitry, base resistors and voltage/current drive in the predriver in the monoblock may be different, and so on. Look very very closely.