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How to stop the boom in the low frequencies

I have a pair of Gershman X-1+Sw1 Subwoofers and have them paired up with a DNA 225 Amp. The Preamp is an old Sumo Athena. Although I am satisfied with the over tonality of the system, what really bothers me are the really quick bass lines that tend to hang and make a slapping sound against the walls. I have tried to stick the speakers out into the room, without improvement. What will tame the bass?
Some tweeks for the amp or the preamp? Cones etc...?
Some sound deadening panels behind the speakers?
or
Some sort of device that simply lowers the registers in the low end?

I need specifics of brands and results,also where purchase them.

Thanks
bemopti123
clueless
763 posts
 
Rives: It's appreciated that you do not want to make the forum an ad. Always a fine line between what's acceptable and what's not. But, if you disclose and are upfront, IMHO, its nice to have a professional room/acoustic person in the mix.

Cheers,
Ag insider logo xs@2x
ivanj
35 posts
 
Maybe your amp is clipping?

I found this at very low volume levels with certain musik.

Do the room stuff, then, look elsewhere. Email me for my melodramatic story,,,,,
sayas
189 posts
 
buy this book to understand the problem better...and figure out a fix.

master handbook of acoustics, fourth edition, F. Alton Everest
rives
953 posts
 
Clueless: Thank you. I debated whether or not to post. As you say, it is a fine line. Sayas, also points out an excellent resource. We use it regularly.
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