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Vertical passive bi amping

I'm currently running a pair of Infinity speakers this way with two Dynaco ST120's. I've recently purchased a pair of original Klipsch Heresys and would like to do the same with these. The binding posts are not set up for this but changing the crossover into seperate high pass and low pass filters seems like a simple enough task. My question concerns issues with changing the impedence curve and possibly blowing out one channel in the amps. Is there some fundamental design change that allow my Infinitys to work this way that my Klipsch speakers don't have?

Martin
kingshead
csontos
1,275 posts
 
If you stay logged in via 'my page' you can edit before another post happens.
kingshead OP
44 posts
 
I'm guessing no-one here has ever tried this before?

Martin
kingshead OP
44 posts
 
Well, in case anyone else is interested Bob Crites answered my query and apparently there won't be any issues connecting the Heresy speakers in this manner. I thank all that responded for your input.

Martin
csontos
1,275 posts
 
To answer your question, probably not. In any case, a knowledgeable tech would know. This was being done back in the 70's to such speakers as the early B&W 801's, Kef 105's, etc.. Not only bi-amping, but tri-amping them.
gvasale's avatar
gvasale
99 posts
 
I made a device like the OP is asking about. Based on an article in Audio Magazine, Nov. 1969 issue. For me, it was a near perfect match for my needs. 500Hz, (actually 520) with off the shelf parts. UTC iron core coils, resistors & capacitors. I suspect the coils are the hard thing to find today. I still have the magazine fortunately. High pass & low pass, 12db/ octave.

I don't think there are any issues wrt impedanced changing as these go between the preamp & power amp. You might think about fusing the speakers. A three way might be different.

The speakers I used are 2 Altec 416a with 511b/808-8a.

I have been satisfied with the results.
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