Long run balanced interconnects

What is the preamp?  Also, it may be helpful for us to know the make and model of the power amp.

Regards,
-- Al

I've used long balanced interconnects on a number of systems over the 40 years and have always been much happier with this than long speakers cables. I've found that balanced connections are somewhat less influenced by cable characteristics than single ended connections (in other words, it's easier to hear the different between cables with single ended connections).

So, assuming that the cables you are using are fairly good quality and not too high in capacitance, your source impedance is fairly low, and the balanced inputs of the component you are driving is truly balanced (rejects common mode noise), you should be fine with 25ft cables. 

I'm currently running balanced connections that are about 22ft between my Parasound JC-2 preamp and JC-5 power amp and it sounds great. 

Power amp is Pass Labs XA 60.8 and the pre is AR 6 Ref

Pre to Power for sure. Like others have said, quality cables help. IF you need to get it up and running a high quality set of Magami will get you started. I use a REF 5se to drive 8m of Audioquest Wild Blue Yonder with very short 1 m speaker wires. Sounds great ;-)
have fun and enjoy the music
jim

Best just try and hear what you think. Agree go from preamp to amp. This length and much longer is done all the time in studios and live events. I like Canare. Here’s a link but you’ll need to buy two as it’s for a single on the link. For $70 it’s cheap to try it out. Canare is a very nice cable and you might be more than happy with it. Canare also comes in a variety of colors. Takes a bit of time to break in so give it time and you will be glad you did. It’s maybe a touch on the warm side but a very neutral with no edge or harshness whatsoever. Doesn’t draw attention to itself.

https://www.bhphotovideo.com/c/product/394022-REG/Canare_CXLRP_XLRJ_25BLU_G_Star_Quad_L_4E6S_Blue_Mi...