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I don’t know your sub but it must have two line inputs (see manual) to which the sub pre-out is connected. You won’t need the speaker level connections because the speakers are now driven by the amp.

Okay my Boston Acoustic CR400 sub manual says:

As a general rule, the best results come from using the line level connections, where sound is passed from the preamplifier's outputs to the subwoofer. Many receivers and integrated amplifiers include "preamp out" RCA jacks on the back panel. You many use outputs labeled "preamp out" or "sub out". Either may be connected the subwoofer's line-level inputs.

It then gives me 2 options to connect. Option one is a preamp out with a L and R jack. I don't believe mine has that.

I do know it has a single sub out so in Option 2:

Use an RCA cable to connect your system's sub out jack to one of the line level in jacks on the subwoofer. If your system lets you switch the sub out jack between a flat response of low-frequency-only signal, use the flat-response setting.

The drawing shows a single cable from the sub-out going to the Left line level in. Why not use the Right channel? Does this mean the sub has some internal circuitry that doesn't require the Right?

The next section describes using the speaker terminals as I am now using. wired this way, the subwoofer does not present any additional load to your amplifier.

I assume I don't really need to worry about the load on the amp for the smallish size of my speakers, so I should use the sub out method? So I would remove the speaker wires from the sub entirely?

I don’t know of any speaker wire that is aluminum

I guess I should have been more specific. I've looked at a lot of speaker wire on Amazon and a lot of reviews say the wire they've gotten are copper clad aluminum. Cheaper to manufacture I'm sure. But I know I can get lamp cord.

You may have to continue using this unless you have a booster amp on the OAT aerial that can send a line output you can then connect to the amp.

Yup, you told me about that one.

Any other stores in the area?

Just the other appliance store in Alpena (35 miles) and it only sells Sony AVRs. Best Buy is a 2.5 hour drive. ABC Warehouse is nearly 2 hours. And there's Wal-mart and K-mart. Have I mentioned I live in the sticks? ;-) I wasn't kidding.

As for the sewing/art room get some small powered computer-type speakers

On my trusty 35 year old Onkyo? That just seems... wrong! :-)

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