Un-equal length speaker cable advice??

Hi all,

I have always used equal length interconnects and speaker cables,...but a new home has an ideal set-up, because of a fireplace, of one speaker being 3 feet away from the power amp and the other being 10.

So....I either have a bundle of wire coiled up behind the close speaker or have unequal length cables.

Any advise is welcome..and any actual experience is much welcome.

Best, Jim