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bridging a Adcom GFA 545

Hi everyone. I'm new to this forum and a little green to home audio. Any help would be appreciated. I just bought a GFA 545 to power my sub and thought I could bridge it to get 400 watts. 200 @ 8 so at 4 ohms it should double, give or take. I'm a bit puzzled as the are no bridging lines going from the L to the R speaker outputs. Can this amp be bridged and if not can I do something to make it bridgable. Thanks again.

Chuck
cpstang

Showing 2 responses by magfan

magfan
1,583 posts
 
If you are going to build a sub, you can always get a DVC driver.....Dual Voice Coil.....and run 1 channel to each coil.
Below about 80hz, it's all mono, anyway.
Make sure it is 4ohms or better to EACH coil.
magfan
1,583 posts
 
A radical solution would be to SELL the Adcom and use the funds to purchase a good plate amp from maybe....Parts Express or Madisound...(Do they sell such amps?) so you can either use speaker level or line level input and get enough juice to do the driver justice.
I have an ancient Carver Cube that I shelved for similar reasons, though the cube IS bridgeable.
Adding 3db to the sub roughly doubled (2x) the power required.
HT setup is beyond me......I know there are many options. Run the front speakers as 'large'=full range or not and so on.

If that is the amp I think, the 15 yr+ old Pass design, while sturdy, you are coming up against the age of some components...mainly caps, which will eventually begin to tell.
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