RCA cable lenght

Almarg

Thanks for the detailed info. It was very helpful.

One more question

I have a Bryston intergrated amp with Wilson Sofia's and using 35ft. Tranparent Ultra's. I was thinking of trying some tube mono's and using the Bryston as a pre. Would it be better to put the amps with the pre and keep the speaker cables and shorter interconnects or the longer interconnects and shorter speaker cables

Matt

Assuming the interconnect capacitance and preamp output impedance satisfy the constraints I described above, and the speaker cables are of adequate gauge to support the run length (the Transparent Cables site doesn't seem to specify the gauge of the Ultras, though), then there is no unequivocal answer based on technical grounds. And the long speaker cable/short interconnect vs. short speaker cable/long interconnect debate is an age-old one, with divergent opinions (as Stan alluded to).

My instinct in this case, though, would be to go with short speaker cables. Your speakers have an impedance which is quite low at mid-bass frequencies, and which varies widely across the rest of the frequency range. The tube amps will most likely have higher output impedance than your Bryston, and you don't want to have the speaker cables adding to that higher impedance any more than necessary.

If the sum of amplifier output impedance and cable impedance (resistance and inductance) becomes significant relative to the speaker impedance, two things will happen. First, bass damping will suffer. Second, in a situation like this where the speaker impedance fluctuates widely as a function of frequency, then an uneven frequency response will result. That is because the voltage losses across the cable impedance and the amplifier's output impedance will vary as a function of the speaker's impedance vs. frequency characteristic.

Regards,
-- Al

Al

Thanks for your research and explnation.

For space and heat purposes I would rather have the amps behind the speakers.

Now comes the process of which amp to use, but that is another thread for another day.

Thanks again for everyones input.

Matt

The longer the run is : you may top some of the high frequencies...

>>08-31-09: Stanwal
You can do it, you may get a little degradation but shortness of speaker wires will compensate for it.<<

Incorrect.

Short speaker wires will not "compensate" for any degradation in a system.

Sorry.