Firstly, I'm assuming this is an amp problem rather than a speaker problem so I've posted it here. Secondly, I hope you guys understand what I'm referring to and can offer some solution. A year or so ago I bought a Denon 1911 which replaced the slimline amp from a cheap and cheerful Sony HT kit (from which I still used the speakers) which is nearly 10 years old. Everything was fine until my sub started to give up the ghost. I recently purchased some B&W 602.5 S3 speakers (second hand from here) to use as fronts. I'm attempting to run a 5.0 configuration in the absence of a sub. What I have been experiencing is, as the title describes, ugly, overwhelming bass. Now this isn't just, 'too much bass' like the house shaking down when there's an explosion. It's inexplicable, or inexpicably loud, low frequency bass. For instance, during a film, a couple of people were simply talking with no other background noise. The whole time there was a thumping noise, like the sound of someone heavy walking around upstairs. I tried some music, namely a lossless copy of Out of Space. Everything is fine until the deep bass section kicks in whereupon it overwhelms the whole song.It's the kind of bass that reverberates in your chest. It is also out of time with the rest of the audio, slightly delayed. It occurs at quiet and loud volumes. I used Audyssey with 3 reference points (small room). I altered the source input levels which alleviated the problem somewhat but made the audio tinny. I went into the options and adjusted speaker settings to small all round and also tried setting the sub to LFE+Main, neither made much difference: overall bass was reduced but the ugly bass was still there. Obviously it's something I want to fix, I'm also worried that it could be damaging my speakers as I don't think they're supposed to produce that level of bass. Do any of you even understand what I'm talking about and have any ideas on how to fix it? Could it be damaging my speakers?Thanks for reading.