Recommend a long subwoofer rca?

The longer the interconnect is the muddier your bass will be and the more flutter and farting you'll get. But if your room just happens to get better bass from a certain corner then it could make up for it. Thats a lot of wire for such a weak signal to go through. You would be much better off if you could run the speaker wire to it. It's a whole lot easier and better if the amp pushes the current a long distance. But since thats not an option right now I strongly suggest any MIT interconnect. Or at least nothing below a T3. They have a wonderfully tight and defined bass. And the price is great.

Monster Cable makes a interconnect designed for sub-woofers. I have not tried it, but they do cables right.

Monster cable is mid-fi. I've had their stuff. MIT destroys them. With their patented passive networks monster can't touch MIT. Buy some MIT off audiogon then go to your nearest audio store (where you can return it later) and buy some monster cable thats twice as much. Then when you've wasted all your time you'll know why there is so much MIT on this site. Because it's popular and great stuff. I started with their lower T3 and have never looked back. Now I own $5000 worth of their wire. Trust me you wont be sorry!

A long run won't help things. I use MIT T2 for the sub, but mine is an augmented setup, so the sub isn't between preamp and amp.