does linking two cables degrade sound?

This posting is seeking information in order to achieve two things:

1) to retain the integrity of the signal coming from the preamp
2) to make switching between two preamps (one for stereo, on for home theater) more convenient, as my current setup requires that I fumble behind an amplifier that is hard to get behind.

Here's the situation:

I am using one 5-channel amplifier for both music and home theater listening. Because I am bi-amping my speakers (each speaker gets two channels from the 5-channel amp, with the 5th channel powering the center channel), and both of my preamps have only one set of L/R preouts, I have attached one Y adapter (two males on one end, female on the other end) on the left two channels and right two channels of my amplifier. Thus, when using my stereo preamp, I run the L/R RCA outs into the two female ends of the Y adapters, giving me four input signals (2 L, 2 R) for use in the biamp configuration. When using the A/V preamp, I disconnect the stereo L/R RCA preouts from the Y adapters and plug in the A/V L/R RCA preouts. Fine.

The problem is that the Y adapters that I've been plugging into and unplugging aren't very long, my 5-channel amp is in a rack that is difficult to access, and I must struggle and fumble behind the amp to change connections between the two preamps.

I was thinking that to avoid this problem, I might incorporate a pair of female-female connectors as follows: put the female-female connectors on the end of my A/V preout cable (which is long, and easily accessible). When I want to use the A/V preamp, I simply unplug the RCA cables that run from my stereo preamp to the Y adapters on the amp (unplugging the RCA's at the back of the preamp, which is easily accessible), and connect these to the female-female adapter that I put on my A/V preouts (which are easily accessible).

I know this sounds confusing, but I think it will make things more convenient. My concern, however, is that all the extra connections (each signal will be subjected to a female-female coupling and then to a Y splitter) may degrade the original signal.

I've heard that long runs of line-level information are okay, and my runs are quite short, but they will be "interrupted" in the sense that there will be two RCA's joined together with the coupling and then to a splitter. I don't know if these interruptions incorporate distortion, or just lower the voltage of the signal. If it were just the latter, then wouldn't I just be able to compensate with some extra gain?

Does anyone have any suggestions on how I might more easily accomplish the use of two preamps with one amp? I guess the Y splitters are a necessity due to the biamp configuration, but it is the other connections that I am most concerned with.

I'm sure they may be splitter boxes with switching mechanisms I could use instead, but I don't know if this is worse than using cables/adapters. I want to degrade the original signal as little as possible.

I would think that using female to female RCA adaptors to connect the cables would result in less loss than incorporating a splitter-box with switching -- so long as the adaptors are of decent quality.
Anything added to the chain will have an effect, albeit great or small. It up to you to decide its value.
In my HO Plato is right. Avoid switching boxes! To try coupling the way you suggest, to my experience, may not even have a noticeable effect on the sound. You'll have to experiment and listen. Connectors should however be of MORE than decent quality. Don't go radio shack. I suggest to get in touch with the Cable Company at www.fatwyre com and ask. They are very helpful and experienced in these things. Good luck and regards,
thanks guys. I got some suggestions from posting this same query in the amp/preamp postings. I'm going to feed the a/v preouts into one of my stereo preamp inputs. it's not a perfect solution, but i avoid switching cables around; now i will just flip a switch for home theater, and my stereo signal will not get degraded. thanks for the ideas.