subwoofer connection quandry


an acquaintance wishes to connect his nad d7050 integrated (which has dual rca sub outs) to his hus stf-1 sub (which has a single rca input) using a generic y-connector. someone at hsu told him that such connection method would short out the amp. i'm perplexed by this advise (granted, i'm easily perplexed). can someone at or near almarg's level of wisdom enlighten us here?
loomisjohnson
al et. al.: thanks for the input. i should have found the earlier thread, which was expressly in point, but i drank too much cough syrup last night, which is interacting very badly with my pysch meds.

Thanks Al, I just looked at the link in the other post, and that is definitely the adapter I made. I found that using a larger RCA connector like this one, it was fairly easy to secure and conceal the resistors inside the connector, making the adapter cable sturdy and having a very clean appearance.
Al and others ... the OP's Q reminds me of what I had to do to solve my sub-woofer issues. Rather than repeat everything I said before, I'll just put out there that the solution to my sub-woofer problem was picking up a custom made impedance buffer that summed the L/R channels without shorting the linestage's main outputs. In addition, I needed to raise the impedance presented to my linestage. The custom buffer handled all of these issues and one or two other issues as well. Read the link Al provided for more information if interested.