20 foot long speaker cable: is it ok?

P.S: Speaker cable capacitance, that was mentioned in the post that was subsequently deleted, will not affect the speakers. Since it presents itself in parallel with the speakers if it affects anything it would be the amplifier. And in any event the 10 gauge Belden cable you indicated you would be ordering from BlueJeans has low capacitance (26 pf/foot). Many speaker cables have vastly higher capacitances.

It is the cable’s inductance and resistance that are presented in series with a speaker, and can sometimes affect the sonics of the speaker. But as I mentioned those effects are likely to be negligible for a 20 foot length in the case of a speaker having the impedance characteristics of your forthcoming JBLs.

Best regards,
-- Al

d2girls

I'm currently running 24 feet of 10 gage cables  from my Bryston 4BSST2 to a pair of Thiel 2.7s. No Problems!

I got the speaker cables from Blue Jeans, along with  some audio interconnect cables, and a 26 foot XLR  to run from a PX05 passive crossover  to my SS2.2 subwoofer.  

More than satisfied with Blue Jeans.

Disclaimer: I'd never heard of Blue Jeans Cable until I bought these on a very strong recommendation from a friend.

 - - George  

Is there any way to move the amp closer to the speakers?
I would use longer interconnects between preamp and amp than use long speaker cables. And, balanced interconnects over RCA.
B