Longer XLR Runs

Rest easy. True XLRs are intended for long runs in noisy environments and they work great in short ones also iff your equipment is truly balanced.

Long speaker cables drop the damping of your amp and can cause bass roll-off, all other things being equal. Bad.

I have a phono setup in another room to minimize vibration. I run a 15M pair of XLRs out of the phono preamp into the balanced preamp. I put the mac-mini streaming Qobuz into the USB/DAC/SACD in that room now. I can tolerate looking at speakers but am more interested in listening to music than staring at racks of equipment in between.

Makes it easier to surprise guests with a new music selection.

I have another room for 'home theatre.'

I use 10meter XLR interconnects without issue.

Kal

I'm using 25' (7.6m) XLR calbes with excellent results. They are Bluejeans cables (Belden 1800F with Neutrik connectors.)

The general thinking is long interconnects and short speaker cables. you should not suffer a loss in quality doing what you propose