Tweakers' Asylum

RE: Here is the URL of the RC Filter Construction, if you are interested

206.228.220.39

Maxamillion

In Reply to: RE: Here is the URL of the RC Filter Construction, if you are interested posted by rick_m on January 21, 2011 at 07:44:53

Here are mine, with the outboard crossovers I built for them. I have brand new EMIM diaphragms from Apogee Acoustics in Australia - the new diaphragms are MUCH better than the stock units in terms of clarity and dynamics, sound like electrostatics, almost.

Follow Ups:

RE: Here is the URL of the RC Filter Construction, if you are interested - rick_m 08:19:05 01/21/11 (2)
Nice!

I'd ask if the crossovers made much difference but maybe I don't want to know. One of the reasons I'm using the models I am is that their shape fits perfectly in the space where I want them. But. OK. Did the crossovers make much difference? I've never had these open or swept them so don't really have a clue what's what. But since I'm still happy with their sound...

Rick
- RE: Here is the URL of the RC Filter Construction, if you are interested - Maxamillion 11:25:43 01/21/11 (1)
  Yes, a very big difference (sorry). I have replaced all the electrolytics with film caps: Solen on the woofer, Solen bypassed with Mundorf Supreme on the low mids, Mundorf Supreme bypassed with Duelund CAST on the high mids, and Mundorf Supreme bypassed with Audicap Theta on the tweeters. Iron core inductors are replaced (except for a 9.5mH on the midrange shunt circuit - too big!) with Northcreek 12 gauge on the woofers and low mids, and Solen Heptalitz 14 gauge on the high mids and tweeters. All wiring is Cardas Teflon insulated Copper Litz (11.5ga on woofers, 15.5 on mids, 17.5 on tweeters).
  
  I also completely rebuilt the equalizer unit that came with the RSIIb's, which made even more of a difference than the crossover rebuild.
  
  As I said, the EMIM diaphragms are the excellent Apogee upgrades; true ribbon design, Kapton film, built to last.
  
  Sound is clean, clear, warm and wonderful. Bass is tight and deep. I am very happy with them.
  - Thanks! I think. - rick_m 11:54:10 01/21/11 (0)
    Now I have yet another thing in the house that's either worn out or could be improved. And that's not counting me, likely the worst of the lot.
    
    Good info, I'll save a copy against the day that these have problems or I get the urge to try and upgrade them. My wife has an extensive list of items with much, much higher priority just now so I anticipate enjoying what I have for quite a spell. Fortunately, that's easy.
    
    Regards, Rick

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