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Thiel CS 1.2 Upgrade with SB Acoustic's

I have a pair of Thiel CS1.2's I got from a woman's garage, that were her ex husbands, and she did not want them. I first had to have one of the tweeters rebuilt, but after that I got to listen to them for about a year!  However, now one of the rubber surrounds on the speaker is coming loose and rattles when playing.  So after some research here is the plan.  I have a set of SB Acoustic SB17NRXC35-4 from leftovers of a car install.  Madisound recommended I get the SB17MFC35-4 as a replacement for the original Vifa cone.  So the plan is to test all three options

1. Compare the SB17NRXC35-4 with the original.
2. Compare the SB17MFC35-4 with the original.
3. Realize original is best and repair the original.

These are all 4Ohm speakers so none will change the impedance of the speaker.

I just ordered the MFC's so it will be a few days.
128x128oak244
reubent
6,980 posts
 
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jafant's avatar
jafant
19,602 posts
 
Very cool! oak244

keep me posted on your project. Happy Listening!
unsound
7,329 posts
 
 The Ohm rating is a nominal one, not necessarily one that repeats it's impedance over the bandwidth of the driver in it's application. Furthermore, Jim Thiel designed his cross-overs to compensate for specific driver anomalies.  Those specially designed cross-overs might alter the non OEM drivers in areas where they don'[t need it, and not alter them where they do need it.
 Either call Thiel for driver replacement or rebuild, or call Bill LeGall of Miller Sound for excellent work on driver rebuilds, just explain the situation.
 Anything less will undo Jim Thiel's hard work and you'll could be left with a Frankenstein butcher job that might seriously compromise the resale value of the speakers.
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