30' RCA>RCA line level  

I also need to get line-level sound from PC sound card output to Denon 5800 input . . . about 60 feet away.

Any ideas how to do that, and preserve MP3+/AAC/CD-quality sound?

instead of using a coaxial cable, Try twisted pair, like Cat5. This will reject induced noise better. Each twisted pair of wires will get an RCA connector. ENough for 4 connectors in each CAT5. I would try not to go any further than 30'.IF this does not work for you, there are other alternatives, such as the Use of BALUNs on each end. There is also the Audio control BLD-10/BLR-10. good luck.

RF shielding would require a foil or combo with a braid over the twisted pair, but the tightly twisted pair reduces induced noise,which is the most common problem. I can find you some shielded /twised pair if needed. I have a 250' roll still I could sell you a length....
Think about the phone lines on the street running miles and miles. Not a lot of noise in a noisy enviroment. Street lamps power lines, crappy lawn mowers (really)
Yes, I know they are mostly digital now...but years ago.

Try using standard RG6 with F to RCA connector adaptors. I have an approx. 30ft run and it works very well. It is very cheap to try. So you aren't out much if it doesn't work well for you. What type of cable are you using now? Good luck.


Jay

Another option

Peavy makes a box that converts unbalanced -10db
to BALANCED +4db.
We call them "Matchboxes"
You would need one at each end
Then
You would use 2 conductor Shielded wire.
<i.e. Mic cable>
This should help eliminate alot of the hum and buzz that plagues unbalanced connections.
And keep the signal up off the noise floor
The peavy boxes are about $100.00 each and are sold in music stores.

In my facility....
When we have an unbalanced consumer source we convert it to balanced +4db FIRST.
Then send it to the rest of the plant.

The peavy box is a I0 10/4 Interface Amp
It converts both ways
-10db(RCA) to +4db(XLR) and
+4db(XLR) to -10db(RCA)
Stereo

Radio Design Labs may have a cheaper one if you can find it.
Good luck

This is an expensive idea but it will work

RG6 and RG59 are COAX cables and are subject to the same if not more problems of induced noise. The larger the diameter, the larger the problem. Induced noise comes from a large elecromagnetic field from appliances or high current wires nearby. The best solution is to move away from these problems. Physical distance is better than anything. Since this is not always possible, a tightly twisted pair of wires carrying the millivolts of audio signal will work the best for cost. The balanced signal convertors are really the best, but not cost effective in this situation IMO.
I like the attitude of most responding. Try something. This is how we learn and pass good information. I want to note that this is my possible fix and may not work in all situations.

Did it here :-).

1) used 120 " run of coax, decent quality, bought in bulk from BetterCable - I live 1.5 miles from Brad :-).
2) then moved from line level to SPIDF coverting toslionk to coax and using this signal. I know, it is reated for 50" only, but I like testing limits.
3) used existing cat 5 to carry first analog, and later SPIDF signal. Both work.

4) for run from PC to 5800 I woulod strongly recommend using a good sound card (I use M-audio audiophile 2496) and coax SPIDF to 5800. This way you will use much better DACS in 5800.

Kleks

Kleks,

My PC is a Dell Inspiron 5000 notebook and the sound card is a soundblaster equivalent . . . it's my only output, and line level needs to go 60' (up, over, down) two rooms away.

I take it shielded Cat5 is worse for this (even tho other thread says it's good for HDTV or video transmission).

Any other ideas for how to get good quality sound from the notebook to the receiver?

Try just using some shielded line-level audio cable (like 24/4), that's what it's made for. As long as you don't have any ground-loop issues now you should be fine, especially since you're using a laptop, they're sound cards aren't all that great.

Nick