No one actually knows how to lculate what speaker cable they need


It goes back to cable manufaturars, mostly provide no relevant data! to sales and the users. None will answer this!
Whay do you think that you own now the optimal cable to your setup?
I think I've figured it out. 


128x128b4icu

Mr. adg101

Welcome to the thread. Good luck with the cables DIY. Regarding your speaker cable requirements (DF is 250. My speakers are Aerial Acoustics 7B’s and my speaker cables are 8ft long per side) you need a 2 AWG. A 0 AWG will be also fine.

What is the thickness of the cables you are currently using?

Bi-wire as you use it (short jumpers and one cable) is the best. Keep it this way.

EMI RFI

No speaker cables need any EMI/RFI treatment. The Amp's output impedance is so low, that it is like a short circuit to GND, from EMI/RFI aspect. The twisted pair however, may cause some capacitance and inductance while two separates won't. (I explained it down this thread already). There will be no noise issues with the speaker cables I offer (for you to DIY).

 


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Damping factor
https://en.wikipedia.org/wiki/Damping_factor

In an audio system, the damping factor gives the ratio of the rated impedance of the loudspeaker to the source impedance. Only the resistive part of the loudspeaker impedance is used. The amplifier output impedance is also assumed to be totally resistive.

For the rest of that link, it is a mistake! This thread is the why. Those who tried it, are the proof.

Mr. batenet

The Inter-M R-500 phone in the US http://www.inter-m.net/_upload/product/2/R-150PLUS_dw_ae.pdf is not responding (not connected). I'll try the S. Korean when time will be proper.

I'm still waiting to your answer about the 10 amp's configuration.

I'm a bit baffled from this £275 amp, with 500W/Ch. In 8 ohms bridged, designed in S. Korea and made in China. The 10 sets of DIY 0 AWG may cost you close to the price of the amplifiers!

 


Mr, b4icu

Thank you for your effort you put down in research of Damping factor.
Have a simple explanation about so many amplifiers,my set up is a combination of hometheater and 2-channel for music,11 channels + 2 subwoofers with amplifiers including buttkickers with own amplification,2 channel with 2 bridged Inter-M 500 to upper registers and one 500 amplifier for left and right woofers with active crossover.Believe me this korean amplifier is a fantastic amplifier for very small money,but only the 500 model sounds good.So my expensive and powerhungry class-a amplifiers have to do service in surround channels,and for serious listening in two channel my Korea design "made in Kina" .