Sonic Impact improvements. Great!

[Panelhead]

Circuit reactance

For my and others knowledge, I just tried measuring C19 and C20. My dedicated capacitance meter will not repeat. I get a different value everytime. But it appears to be something like 0.01 ufd. This may not be close. It looks like my meter is resonating the circuit.
It may be the choke or the 2024 that is screwing up the readings. I do not really want to remove one and measure.
These are multilayer ceramics, wish I knew the value. I assumed they were only using the 0.15 ufd strapped across the outputs to replace the 0.01 and the 0.47 from the outputs to ground.

George

 

[Pano]

I'll pull one off my dead S.I. board and give it a measure. Would be nice to know what value they are.

 

[dgo]

[....]

I actually went overboard and removed the high-pass RF filter as well.

The end result is decent, but I don't think that it's necessary. I noticed that my DC offset increased quite a bit (+55 mv in one channel, -33 in the other -- the stock amps have 3-5 mv offset in either channel). This may be due to RF.

[....]

Mike

Hmm this seems to vary quite a bit .. both my (still stock) si's both have quite some DC offset.

Does this have an influence on sound quality?

 

[planet10]

Hmm this seems to vary quite a bit .. both my (still stock) si's both have quite some DC offset.

Does this have an influence on sound quality?

Don't use them as a tweeter amp without some sort of blocking cap...

Depends on how much, and on your speakers (the speaker will be displaced from its rest position somewhat.

Nelson figures anything less tham 100 mV is fine.

dave

 

[lokitas]

Thanks for the c20 help

Thanks for all the investigation and feedback on the c20 question! Should I assume that the original cap go damaged?

I think I'll get over the gunshyness and try some of the more basic input mods, too.

--Lokitas

 

[JWFokker]

EDIT: Stupid Firefox tabs has me posting in the wrong threads.