875HT (Bridged) vs. 6B-SST for IB1s

0 Members and 1 Guest are viewing this topic. Read 1349 times.

jradley

  • Jr. Member
  • Posts: 20
875HT (Bridged) vs. 6B-SST for IB1s
« on: 23 Jan 2004, 11:06 am »
Hi,

I'm about to purchase a pair of IB1s and an IB1-Centre and had planned on getting a 6B-SST to drive them.

Then came along the the 875HT and I figured 3 pairs of channels bridged for the front/centre speakers and the remaining channels for my rear speakers would do nicely.

However, I have since read that (in general) bridging amps like this is not recommended for low impedance loads and that I am almost certainly better off sticking with a 6BSST over an 875.

I'm in the UK and getting an 875 to audition is a little tricky at the moment (they're a bit rare here)

Any thoughts ?

Cheers,

John

James Tanner

  • Facilitator
  • Posts: 17719
  • The Demo is Everything!
    • http://www.bryston.com
875HT (Bridged) vs. 6B-SST for IB1s
« Reply #1 on: 23 Jan 2004, 12:17 pm »
Hi again John,

When you bridge an amplifier is 'sees' 1/2 of the impedance it sees in stereo. So a 4 ohm load becomes a 2 ohm load. This lower impedance makes it harder on the amp to drive. The IB1 is a 4 ohm speaker so I would recommend staying with the 6B SST.

james

jradley

  • Jr. Member
  • Posts: 20
875HT (Bridged) vs. 6B-SST for IB1s
« Reply #2 on: 23 Jan 2004, 12:37 pm »
Hi James,

Many thanks for your quick reply.

The decision is made - the 6B-SST it is.

Cheers,

John