Yes I've tried everything.The manual says "since the Delilah (crossover)has bass outputs for a single mono subwoofer OR two stereo subwoofers, and bridging circuits at EACH bass output; it can bridge stereo amplifiers at any of these outputs for dedicated subwoofer amplification. At your option, however, a high powered stereo amplifier can be used without bridging for stereo subwoofer applications, providing it has at least 200 watts of continous power per channel"
Mind you, there is no bridging switch. What I don't understand is that the only way I get sound out of both woofers is to use the mono outputs on the crossover.
Maybe I should just leave it this way.
Thanks.