Montana Big Sky 3575RL Subwoofer?

[Montana_1988]

This question goes out to those people who own a 3575RL. We purchased our 2003 Big Sky 3575RL used. Like may others that have complained about the stereo, we also find ours severly handicaped. I know that Keystone has placed the subwoofer in their trailers in some pretty obscure places but I have not been able to find one in ours at all. Is there a subwoofer installed in the 3575 and if so where is it? Either ours never came with one or the previous owners removed it.

Thanks.