My sub (which is new) is marked with 'LFE' and one pair of L/R inputs.
Can I connect my old stereo's, say tape deck L/R out, to my sub's L/R input?
If not how can I connect my old stereo to my sub?
I'm very new at this so I apologize if the question is primitive.
It gets a bit trickier if you have a powered sub (it has its own amplifier). If the sub has speaker level inputs (the type that accept speaker cable, not the RCA plug type), then you could use the B Speaker outputs from your receiver for the sub just like above, but you can use the crossover (if available on the unit) in the sub to filter out the higher frequencies. Just engage both speakers A+B on the receiver again. If your sub doesn't have that connection, meaning it only has RCA style plugs, there is not a real practical way to use the sub. The tape deck outputs are sent at a constant level, meaning that you wouldn't be able to control the volume of the sub from the receiver as the receiver is always putting out full volume. You could adjust the volume on the subwoofer's amp, but it won't track the volume of the main speakers. Meaning if you turn the volume up or down on the receiver, you will need to manually adjust the volume on the subwoofers amp as well. Technically this could work, but in reality would probably be so cumbersome it wouldn't be feasible on a day to day basis.
It is a Polk PSWi225 wireless and powered subwoofer. See it at: http://www.polkaudio.com/products/pswi225.
I have TWO of them, btw.
The wireless transmitters that comes with these subs has only 3 RCA type plugs (one LFE and a L/R pair). I already have one subwoofer connected to a new receiver (it does have another sub out for an additional subwoofe)r. My old stereo is in another room, however, so I was hoping I can connect the second subwoofer to it.
So my choice is to connect the second sub to my old stereo in another room even with the limitations you describe OR connect a second sub woofer to the new AVR which already has a sub woofer connected to it.
Running the sub on your older AVR, you could try a speaker level to line level converter, like this one, try building a converter yourself, or buy a new AVR.
In regards to the tape out question, as I mentioned above, technically it can work. The problem is that the tape deck output is not volume controlled. So if you decide to use that option, you will not be able to control the volume of the sub through the receiver (the receiver will always be sending full volume signals out of the tape deck connections). So if you want to change the volume, you would need to change the volume on the receiver for the speakers, then walk to the sub and change the volume for the sub through its own amp (we'll call this option B).
Technically this (option B) would work, but to me it seems it would be far more of a day-to-day hassle then buying an inexpensive line converter and using that (as in option A).
Before we conclude, of the various converters you provided a link to, do you have a recommendation? Or even better, what distinguishes them in terms of price? Why are some $30 and some $7? I want to know what to look (out) for.
Again, you've been very helpful and patient with my obvious ignorance.
In case you want to do any further reading (not really necessary as you've got the concept, but in case you're bored)
AVS Thread 1
AVS Thread 2
More technical AVS thread
Schematic in case you want to build your own.
I have a Sony STR-AV320 am/fm receiver with A and B speaker outputs. I connected two in wall JBL SP6C speakers to speaker A outputs (left and right). I then connected an Acoustic Audio HD-S8 in-wall subwoofer to the right channel of speaker B. When I activate both speaker A and B I receive audio out of only one of the JBL speakers and audio out of the subwoofer. I I deactivate speaker B I lose audio in the subwoofer but now both the left and right speakers connected to speaker A outputs are emitting audio.
How do I get audio simultaneously out of the two JBL speakers and the subwoofer speaker? Thanks for any help you can offer.