Smallest room dimensions for good bass to 20hz

Although 20Hz is 56.6 ft long, one needn't 'fit' the whole length in the room, just 1/2 the wave will do nicely, which gives 28.3 ft. Also, the corner to corner (ceiling to floor)distances must be factored in and of course those dimensions are always longer than any one of the three other dimensions.

Aball, I guess more information would help. I have fairly large speakers, Aerial Acoustics model 9s driven by a Parasound Halo A21 amp at 250 watts per channel. At present they are in a L shaped room 7ft high, about 25 feet long on both ends, and 14ft wide. These speakers go down to 30 hz and in this room don't overload the room. In the future I will build a dedicated room for these and don't want to build to small a room for this set up. I wont have the room to build a room thats bigger than 10ft high 25ft long and 16ft wide. I also don't want to build any bigger than need be, but have heard that full range speakers can overload a small room. I also may add a good sub or two to fill out the last octave.

Upper corner front left to lower corner rear right need to be 1/2 of 56.6 ft. That length works out to be the SQUARE ROOT of:
[(square root of: L squared + W squared) SQUARED + H squared]

Of course if your listening room has at least one wall which has (roughly) half its total surface area open to an adjoining room, you need to measure the longest top-to-bottom diagonal of the combined spaces ;-)) Have fun!

If you are going to the expense of building a dedicated room, why not get an acoustical consultant like Rives in to help you out?

Sarcher30,

Swampwalker offers some good advice. If you are going to the expense of building a dedicated room, get some professional advice. I've never used Rives, but I've checked out their website and their rates seem to be very reasonable. For possibly less than the price of a component upgrade you can get a customized room layout showing size, materials, etc. Heck, if you get it right the first time using professional advice, it could actually save you money in the long run as it might prevent unnecessary upgrades in an attempt to overcome bad room acoustics.

Just my $.02 worth......

Enjoy,

TIC