Need 20 - 25 foot spk cables.

Thank you everyone for for the info and replies.  I agree with many, and have mixed feelings about others.  Yes short is great agreed, and I just spent a good ampunt this past spring for 10 foot of a high end brand of wire.  No, the poer amp can'y ( easily ), be moved.  I'd have to pay to have a new outlet installed.  I'm not sure about long runs of cables from the preamp either, but I do have balanced outputs, but then again a long run of preamp to amp cables would be pretty pricy as well.

Roger Sanders actually says that the coax cables actually are a good match for a panel type for speaker.

Wire is funny stuff.  You see so many ads for expensive wire, all with what they call the "best" method of construction.  Does anyone know for sure.  It's all up to each persons ears. 

Monolith Speaker Wire - 50 Feet - Silver - 12AWG with Braided Nylon Sleeve, Oxygen Free Copper, Multi-Strand Conductors, PE Insulated https://www.amazon.com/dp/B07MT4QVTM/ref=cm_sw_r_cp_tai_Ki.8Db0VB0DRW

I was in a similar situation requiring long speaker cables - give grannyring at this site a shout - he can fab some excellent 10ga cables for you with excellent performance............I am very happy with their performance

Not sure of your price range , but I am overjoyed with this company's cable design .
This is their lowest price 12 gauge from their best-price vendor .
https://www.ebay.com/itm/Analysis-Plus-BULK-Chocolate-Oval-12-2-Speaker-Cable-Length-26ft/132998829347?hash=item1ef7591523:g:AWwAAOSwFzNchaAG

To be fair, I am using a more costly cable and short , but with their patented geometry . Much better than the AntiCables I used before .

The OP needs a pair of 25 foot cables.  That is a 26 foot roll and the last one they have.