Welcome, Guest. Please Login or Register
Decware Audio Forums
11/28/14 at 00:21:54


Pages: 1 2 
Send Topic Print
changing capacitor values on ERR (Read 2128 times)
Matthew (was ML)
Verified Member
**




Posts: 20
Re: changing capacitor values on ERR
Reply #15 - 08/12/14 at 06:12:46
 
I'm back to 8 ohms R.  
Tried 2x 3,3 cap on each side. Bit deeper.  Nice.

Can't find the 2000 hz issue.  Maybe it is the diver in my ERRs.  I plugged in an old driver from my car and it plays 2000-3000 hz strong and no room issues or interaction with the other ERR.

Tried a .68 bypass (2-5).  It was was super live sounding, cool, but so too bright, harsh, loud in high end that it was overbearing.  

Learning about crossovers.  Found a calculator: http://ccs.exl.info/calc_cr.html

The tweet alone has a nominal impedance of 5 ohm.  If I add a 8  ohm resist should I enter 8 ohms or 5+8=3 ohms into this calculator?

At 8 ohms, if I use 3, it means I can go up to 11,7 u on the cap.  Maybe this why Zygi said I can go to almost 12?  If I use 8 ohms in the calculator, for the resistor alone, then I can only go to 4,4 u to cross at 4500 where the tweet starts to roll off.
Back to top
 
 

Matthew
  IP Logged
will
Seasoned Member
****




Posts: 1264
Re: changing capacitor values on ERR
Reply #16 - 08/12/14 at 07:55:03
 
Sounds like you are getting places toward getting the sound you want.

Best I can figure out you would use the 5 ohm of the tweeter for the crossover calculation since this is what you are putting the cap on to crossover. I think the resistor you use on the way to the caps are before the crossover and function more like a volume control for the crossed tweeter rather than being part of the equation.

When I used the calculator you found, with 5 ohm @ 4500, I got 7.066...5 ohm @ 3000 = 10.6, pretty close to Zygi's estimate. If you tested the two 3.3s and one .68 that would be about 4200, and with two .68s about 4000 right? Could be interesting.

Back to top
 
« Last Edit: 08/12/14 at 07:58:32 by will »  

Mac mini, Tranquility DAC, CSP3, TORII MkIV, Morrow SP-6, HR-1s...VHaudio DIY, Grover, MAC ICs...PSAudio P5 and Shunyata Defender, PI Audio and DIY power cables, HerbiesAudioLab isocups and tube dampers...
  IP Logged
Pages: 1 2 
Send Topic Print