subwoofer connection quandry

Hi Loomis,

Thanks for the implicit compliment. See my post here, which explains the concerns, and the rest of the discussion in that thread.

The bottom line: It might work ok, and some people do just that, but I don't consider it to be good practice and I would recommend against it. There might be adverse effects to both sonic quality and the long term reliability of the D7050, depending on the specific design of the circuit in the D7050 which drives the sub outputs. I would recommend either obtaining a separate mixer to combine the two channels, as discussed in the thread, or else connecting at speaker level.

Best regards,
-- Al

Al,

As usual, your comments are a pleasure to read and very informative. Would like your opinion on this. Years ago when I worked at an audio dealer, I would make a "y" adapter using 2 resistors. Using a simple stereo RCA cable, just connect both channel outside shields to the outside of the single RCA. Then use a 1/4 watt 1K ohm resistor in line with the L & R center wires before tying them together to the center pin of the single RCA. I had found this published somewhere as, "How to make a stereo to mono adapter." I made quite a few of them to use in different applications, and never had a problem. How does this compare to using the typical y-connector?

(i posted my followup query on the wrong post) but, almarg, in your expert view, would there be an issue with simply connecting one of the two sub outputs of the amp to the sub input as others have opined?