I want to build a subwoofer mainly for music, my main monitors are the small but wonderful KEF LS50 (probably to be upgraded in the future). The crossover frequency would probably be 60-80 Hz. The room is about 70m3 (about 2500 cubic feet) but the space extends to other rooms so the effective volume is larger. The house is made out of concrete and there are large windows behind the loudspeakers. I sit approximately 3 meters from the loudspeakers.
Cost isn’t really an issue (within limits, I work hard for my money) as I want to build the best possible sub that I can. If/when we move to a larger house I plan to build a second identical sub. The box size I have in mind is about 100-150 liters.
I will also use my system for 2.1 or 2.2 cinema and possibly for 4.1 or 4.2 in the future. But as said, the main focus is on music.
This is what I originally had in mind:
– 1x 18″ EighteenSound 18LW1400, or 2x in a dipole configuration (separate enclosures)
– Hypex DS8.0 amp module http://www.hypex.nl/product/2012-11-23-13-44-01/2012-11-23-13-44-19/ds8-0.html
– 100-150 liters sealed enclosure (lowest end boosted by the amp EQ) to get below 20Hz with room gain.
– DSPeaker AntiMode 2.0 DualCore to dampen room modes http://www.dspeaker.com/en/products/20-dual-core.shtml
Then I read glowing reviews about the Acoustic Elegance drivers. What would you suggest from the AE range?
Another alternative idea I have is to build a “chest” (about 200 liters internal volume) that could be placed between the main speakers. Two large drivers, one pointing to the right and the other driver to the left. I don’t know if it should be a dipole sealed (separated from each other) configuration or a stereo sealed configuration with an internal wall separating the speakers. I have had stereo subwoofers before and I really enjoyed the effect, but a dipole configuration would almost remove the vibrations and it would require one less amp module (but as I said, if I need several amps to get the best sound then that is what I will get). We have a white cabinet for DVD’s and CD’s between the speakers right now so I could get away with such a design if I manage to find a good solution for storing the media.
High End sound quality for music reproduction from a relatively small enclosure is the goal. Therefore I will of course consider all alternatives such as vented or passive radiators if that is what it takes. I want to go totally overkill…
I would very much appreciate suggestions or links to similar projects. I’m not an engineer and I don’t need to build anything unique, I enjoy building things that simply work. A proven project would be perfect. Thank you!