Adding an extra 1ft to premium speaker cables

Move something (temporarily) to see how the cables sound with your gear - you may not even like the sound.

DeKay

dekay, exactly, who says they are great based on cost, or ideas, gotta hear them, AND you need someone to help you blindly compare them so you don’t have expectation bias of the nth degree.

IF they actually sound great, you might consider re-working the location of the connectors on the speakers to a new location (you could make a recessed skirt and put the connectors on the side or front), or make a new high quality whip from the crossover board to an external  connector box to let you use shorter cables

One of the most surprising things is when you open up a renowned vintage speaker and see the small common wire the OEM used back then. These great speakers often made their mark as great using lightweight bell wire!

+1 don't do it' might as well buy some zip cord at Home Depot...  Any benefit from that "premium" cable would be lost.

What’s the downside of going short.  Cost benefit? 

@rankaudio can you elaborate on “premium quality speaker cables”? 
What are they exactly? To me that’s a very vague description that can mean anything from $20 cables to $20,000 and up in cables. The most practical path forward depends on your answer.