Of course for the money it will be hard to beat DIY. Maybe you should go to the madisound and partsexpress sites and ask them. Lots of great knowledge there. For a grand you can build a killer sub. There's some other good ones: M&K used, VMPS kits or assembled, HSU and others. These are all capable of very good articulation and power for music. I've not heard the Rel but have only read good. If you think you wouldn't mind DIY though I'd go that route. There's a diy called the sonotube: http://www.hometheatertalk.com/DIY_Projects/SonoSUb/sonosub.html
I thought this would make a killer sub only I'd use a better and more powerful amp. Also it doesn't take as much floor space as a box. Good luck on your search. Subs are wonderful if you like the power in the bottom octaves. I run a sub on top of full range speakers from 45hz as I love the power of the first octave.
I thought this would make a killer sub only I'd use a better and more powerful amp. Also it doesn't take as much floor space as a box. Good luck on your search. Subs are wonderful if you like the power in the bottom octaves. I run a sub on top of full range speakers from 45hz as I love the power of the first octave.