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Thiel CS7 experiment

I thought I would share an experiment I did with my Thiel C7 speakers, which probably not too many people may have tried. I have owned a pair of Thiel CS7’s since 1996 and am still extremely happy with them. I was worried about them breaking down after all these years, and bought another pair as spares. The spares are in excellent condition, and as an experiment, I hooked them up to my Krell 350 MCx monoblocks as a second pair. So now I am listening to two CS7s per channel. Has anyone else tried two speakers per channel? I can only say that it sounds amazing. A wall of sound, great imaging, great bass. Call me crazy, but I am keeping it this way.

oeneroorda
unsound
7,394 posts
 

Back to back?

soix
10,476 posts
 

I’m a little surprised they don’t mess with each other’s time/phase coherence thing, but hey whatever works!  How do you have them positioned?  I assume you’re either single or have an amazing wife. 😜

onhwy61's avatar
onhwy61
5,365 posts
 

I remember a dealer in Illinois recommending two pair placed in a back to back, bi-polar setup.  I don't recall if he was using Krell or ML amps.  I never heard the setup, but the dealer said it was his ultimate recommendation over Wilson, B&W or Infinity from that time.

gs5556
1,255 posts
 

Careful... those speakers drop to two ohms above 10Khz and stay below 4 ohms for most of the frequency range. Doubling the speakers on the amp terminal causes the amp to see half the CS7's load (1 ohm!!!) and can easily fry the tweeters on clipping. 

The low, flat impedance of Thiels is why they need a high power amplifier while at the same time are friendly to tube amps.

oeneroorda OP
8 posts
 

I have positioned them side-by-side, slightly toed in. I have a fairly large listening room, 23x26 feet, with a vaulted ceiling. I had thought that the imaging would be fuzzy; to the contrary, the stereo image is wide, deep, and precise instrument placement.

 

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