2. amps-preamps
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Using Adcom GFA-555s as monoblocks to power magnepan 3.3s in active biamp

Yeah, a long title but it says it all.  Presently I have my rebuilt Magnepan 3.3rs actively biamped through a Marchand active crossover, then using 2 stereo amps to power bass and mid/treble respectively.

I am considering taking two Adcom GFA-555s and bridging them and using one each to power the bass panels of the maggies. 

Since the Magnepans are 4 ohm rated, however it's only the bass panels I'd be powering, what are your thoughts on stability?

Appreciate the help.  Don't need suggestions on "selling all my amps and buying one bigger one" - I have a lot of different amp options but am a tinkerer and want to see if the power of a bridged adcom would be good to control the bass panels. 

jji666

Showing 1 response by audioconnection

audioconnection
1,271 posts
 

((((Wow, thanks.  So, another question: is there any harm in running 1 channel of each Adcom?)))

that's the ok way if your going to do it.

While the Adcom is at its best controlling woofers like some of the infinity speakers

In my experience i cant thing of a worse combination.

These amps are way over damped for any of the Magnepans.

Try any vintage Bryston and you will quickly see what works.

 listen to The Planets, Gustav Holst 4th movement with the opening Acoustic Basses you will appreciate the proper dampening once you experience the difference.

 JohnnyR Magnepan Dealer

 

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