Subwoofer equalization is a useful thing to do. Many tools are available on the market to do this. The key thing to realize is that many of the low frequency problems in your home theater are caused by the room itself. Trying to use an equalizer to solve room problems will have very local success at best. … Read more
The Auralex SubDude is a great product for reducing vibrations between the subwoofer and floor. This product will help tighten up your bass if you have anything, but a concrete slab for a floor.
I work on many surround systems every year and find a surprisingly large number of polarity errors. These mistakes are sometimes wiring errors by the installer or consumer, but frequently they are in the equipment itself. I suspect many manufacturers are not checking the polarity of the product after assembly. Human assembly of speakers and… Read more
Jensen makes a nice little product that can remove 60Hz ground loop hum from cable systems. This will not work with satellite systems. http://www.jensen-transformers.com/datashts/vrd1ff.pdf
Here is an interesting product that can eliminate ground loops without lifting the electrical ground. http://www.ebtechaudio.com/humxdes.html Note: this product has a 6 amp capacity limit. This is another product that can be used in the line from your preamp or receiver to a subwoofer to solve the problem. DTI Ground Loop Eliminator