Bi-amping With "Y" Splitter: Any Impedance Problem?

Ron Resnick

Site Co-Owner, Administrator
Jan 24, 2015
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For our electrical engineer members: Does using a "Y" splitter on an interconnect cable to direct a pre-amp output signal to two different amplifiers for bi-amping cause any impedance problem?

Does having the dual amplifier loads derived from the same interconnect alter the source/load impedance seen by the input of each amplifier?

Thank you!
 
For our electrical engineer members: Does using a "Y" splitter on an interconnect cable to direct a pre-amp output signal to two different amplifiers for bi-amping cause any impedance problem?

Does having the dual amplifier loads derived from the same interconnect alter the source/load impedance seen by the input of each amplifier?

Thank you!
It may or may not be a problem, but the impedance definitely changes. For example, I have a solid-state amplifier I use to drive my sub. It has an impedance of around 10K ohms. I also have a tube amplifier I use to drive my Quads in my system. It has an impedance of approximately 100K ohms. The 100K load is an easy load to drive but when I add the 10K load of the solid-state amp, the load is more difficult to drive. As a consequence, the pre-amp I use should have a low output impedance. If I only drive the tube amplifier, I don’t need the pre-amp to necessarily have a low output impedance. Hope this helps.

John
 
Thank you, John.

Yes, that's what I was expecting.

I just checked the output impedance of the transistor amplifier in question, and it's 200,000 ohms, so that should be fine.

Are you using a simple "Y" splitter to split the signal to the solid-state amp for the subwoofer and to the tube amp for the speakers?
 
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