|
Audio Asylum Thread Printer Get a view of an entire thread on one page |
For Sale Ads |
107.215.180.109
In Reply to: RE: SET wtih passive pre? posted by dvb on February 27, 2014 at 21:10:00
dvb: thanks for the post. i think that you are saying that for non-phono sources you prefer the sound with the passive in the system to the wright.
i think that you are also saying that a low capacitance intercommnects makes a bigger diff in your system than the amps. thats pretty mind-blowing to me. how can one tell if an intercnnect is low capacitance? can it be measured?
regards
-andre d
Follow Ups:
"how can one tell if an intercnnect is low capacitance? can it be measured?"
Yes. I use a Sencore LC53.
I just replaced some Monster Cable MSeries M350 (120pF) with some Senergy Cable by Senergistic Research (30pF) and in my application it made a large difference in the high frequencies.
Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"
cool. at what point is the capacitance considered "low"?
thanks
-andre d
All coax wire has shunt capacitance.
It seems like 25-30pf per foot is the "normal" range.
The total amount of shunt capacitance plus the Miller capacitance of the input of the amplifier (or whatever the cable is feeding into) vs. the output impedance of whatever the cable is being feed from creates a low pass filter.
The -3db point of that filter needs to be high enough that you don't have a audible loss of high frequencies or an audible phase shift.
The old rule of thumb goes like this, if you want the system to be flat and phase shift free all the way to 20kHz, the -3db point of that filter needs to be 200kHz.
So, depending on the output impedance, "low" in one system might be "high" in another.
Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"
Post a Followup:
FAQ |
Post a Message! |
Forgot Password? |
|
||||||||||||||
|
This post is made possible by the generous support of people like you and our sponsors: