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in wall passive sub - can I connect to my receiver using this?

post #1 of 7
Thread Starter 
apologies in advance - I am new at this. we just moved into a house that has built in 5.1 speakers. Got the 5 speakers hooked up and working with a Sony STRDH830, but haven't been able to hook up the sub because it is passive and the receiver needs a powered signal for the sub.

just need something simple to get it work - i don't play it very loud, but I would like the subwoofer to work. Will something like this work?

http://www.amazon.com/LP-2020A-Lepai-Tripath-Class-T-Amplifier/dp/B0049P6OTI

There are 2 thick cables with 4 wires each. One labeled sub in and one labeled sub out. is this possible and if so, which wires should I be using?

Thanks in advance.
post #2 of 7
A picture would help.

But I don't think it's going to sound very good without an proper enclosure.
post #3 of 7
Quote:
Originally Posted by turtlebud View Post

apologies in advance - I am new at this. we just moved into a house that has built in 5.1 speakers. Got the 5 speakers hooked up and working with a Sony STRDH830, but haven't been able to hook up the sub because it is passive and the receiver needs a powered signal for the sub.

just need something simple to get it work - i don't play it very loud, but I would like the subwoofer to work. Will something like this work?

http://www.amazon.com/LP-2020A-Lepai-Tripath-Class-T-Amplifier/dp/B0049P6OTI

There are 2 thick cables with 4 wires each. One labeled sub in and one labeled sub out. is this possible and if so, which wires should I be using?

Thanks in advance.


The power amp you have selected defines the phrase "peanut whistle". If it is all you want, then fine but if you want some kicking bass, not so much.

I'm not going to damn in-wall subs outright because walls may be good enclosures or not. Thin drywall is going to absorb a lot of bass energy.

You've got bit of a termination situation going there - the two bare wires for "sub in" need to be matched up with a RCA connector. If you don't solder get a regular single RCA cable, cut one end off, and use twisting and wirenuts to connect up to the two wires that you have. I get the feeling that your two wires aren't marked plus and minus so you will have to either get a ohmmeter and chase down the other end and see what is hooked to what. Or, you can try one way and if it hums a lot or doesn't make in any tuned, try the other. This is a good experiment to try with a small amp as opposed to a large one, by the way!
post #4 of 7
Thread Starter 
Here are the subwoofer wires I was referring to. The one on the left is labeled sub in, and the one on the right, sub out:

and here is what I can see of the subwoofer:
post #5 of 7
If it has sub in and out wires you can connect the sub in to the left and right speaker outputs of your receiver and the sub output wires would get spliced to your left and right speaker wires. You should take off the grill and remove the sub to check which wires are connected to + and - to make sure you get the wiring correct, unless it is marked.
post #6 of 7
Thread Starter 
Thanks bobl, I tried exactly what you suggested and it works great! Connected the white/green sub out to the red/black left speaker and the red/black sub out to the red/black right speaker. Then connected the white/green sub in to the left speaker input on the receiver and the red/black sub in to the right speaker input on the receiver. Sound is good enough for me - pretty much what I had hoped for. No need to look into an amp for the sub for now.
post #7 of 7
I am glad it worked out! I forgot to mention but you probably already knew is to set your front speakers to large and no sub in your Sony.
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