To Bridge Or Not To Bridge


Howdy. I have a Krell KAV-500 with five channels running only three Thiel SCS4 speakers. I don't have any need of the other two channels for the foreseeable future.

Anyone see why I shouldn't bridge two of the channels to give the center more power?

It sounds fine now but more power never seems to hurt with Thiels. The only reason I ask is that I don't want to undo all those screws if there is a reason not to do it in the first place. Thanks!
leoturetsky
P.S. If you're concerned regarding the inefficiency of the Theil speakers and the capacity of the bridged KAV to drive them, give Theil a call. Better to be cautious. It's likely there is no issue, but best to be informed.
Schipo -- ROTFLOL!!!

Leo -- Bob R. makes an excellent point. In bridged mode an amp will see the speaker impedance x 0.5. The Thiel is rated as 4 ohm nominal, 3 ohms minimum. Therefore in bridged mode the amp will see 2 ohms nominal, 1.5 ohms min. I looked at the amp manual, http://www.krellonline.com/archive_pdfs/KAV500/KAV500_V990_MAN.pdf, and I see nothing that provides confidence that the amp will be able to handle that acceptably.

Regards,
-- Al
Almarg, that was my concern as well. I don't see anything confidence inspiring in the manual either. But Bret D'Agostino said it would be fine. I'll call again to double check, I don't have the bridging wires anyway it turns out.

Douglas, the KAV-500 is lifeless and monotonous in my opinion. But its just fine for HT which is why I don't swap it out. The Classe has lots of synergy with the older Thiel 1.5s as many before me have discovered. Also, the power of the Classe is 400W@4O and the Bridged Krell is 400W@4O so you must be thinking of a different amp when you say there is more power.
Well, an email from Krell customer service contradicts what Bret told me.

I guess the answer is Not To Bridge.

Maybe I should run some speakers to the porch...