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Please help asap.. reciever and sub wiring problem

 

New member
Username: King244

Post Number: 2
Registered: Dec-04
Hi all....I will try to explain as short as possible....
I have a home theater im setting up with a yamaha 5730 reciever and jbl sattellites and powered sub...
I read somewhere on the polk audio site the best way to connect sub is off the front channels off reciever and set front to large with sub off, this way i will get all the low end with music as well as movies....
Well, I ran all the wiring in my house i just bought (took 3 days, long story, very difficult)...I dont know why but i only ran 1 speaker wire to the sub...all the speaker wires are in the wall 12 gauge....now the problem is the sub has line level inputs for left AND right or low level inputs, rca....
How can i connect to the reciever...I was doing it earlier and i just connected off the fronts by connecting the front speakers and also making 2 jumper wires off the left and right and just tied together the positives from both channels and negs from both then connected them to my sub wire, left and right....I was only able to fool with this a minute or 2 before i had to leave but the reciever was shutting down with the message "check speaker wiring"...
Anyone know why and what i can do to connect the sub so that i will get all the low end with any source?????

Help....
 

Bronze Member
Username: Shantao

Post Number: 66
Registered: Apr-04
You wrote:
"I read somewhere on the polk audio site the best way to connect sub is off the front channels off reciever and set front to large with sub off, this way i will get all the low end with music as well as movies.... "

Personally i find it significantly easier to use the LFE out on the receiver to the line level input on the sub. Then wire the speakers normally. Turn the crossover on the sub as high as it goes and use the 5730's internal crossover settings to 80hz (or whatever sounds best for you). Set the speakers to small. You will get the sub low end with movies or music this way.
 

New member
Username: King244

Post Number: 3
Registered: Dec-04
Thanks Shan I will try that..in addition on th3e yamaha web site it says I should also set the subwoofer to "both"...I am connecting today so ive been up half the night...
The only problem is that i only have a set of speaker wires from my reciever to the sub, so i am going to try to make a sub cable of them and put rca connectors on the ends....the wire is 12 gauge so im hoping it will work....
 

Bronze Member
Username: Shantao

Post Number: 68
Registered: Apr-04
If I am understanding you correctly here, it sounds like there is a set of 12 guage wire running to the sub?

You can wire an rca jack to it, but it might be running unshielded. If there is not too much length, and it doesn't run parellel to any power lines, you will probably be okay. If there is buzzing or noise, that might be a problem.

If it is a problem, consider moving the sub closer to the sub and running a sub cable that is shielded.

Good luck
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