Originally Posted by Mfusick
LCR = Tempest 12"
Surrounds = alchemy 8" or v10 volt coax
The coax can be a little smaller and they have less directivity and more dispersion so depending on what you want they may be better or worse. In the money spot the alchemy is better but outside it the volt would probably be more forgiving. As a speaker the alchemy probably sounds better (I'm guessing) and is a better music speaker but for surrounds the volts have some attraction , you could make angled boxes for either.
No reason you could not fatten up the fusion 8 box also to make it fit in a colum with less depth. The stock box is narrow so make it wider and less deep and keep the cubic volume the same is an option.
For bass you want a high value 18" ported at about 17hz. Build a few and try to get one in the back of the room if you can.
I haven't considered the coax mostly out of lack of knowledge. I used a D.E. layout for my room, and I think Dennis typically specs Procellas which have an 80 degree radiation pattern (I think). I "assumed" that the coaxials would have a radiation pattern greater than that, but now that I think about it, I may be wrong about that. Not having any other data points, and not really knowing what I'm doing, I've just assumed I needed speakers with a similar radiation pattern.
I'm open to suggestions/information/feedback here!
Originally Posted by tuxedocivic
Edit: Looks like our posts crossed. I'll leave the below items since it itemizes my needs fairly well. Is the "new sentinel" the Fusion-15" sentinel on the DIYSG page, or is it a new design that's currently in the works?
Budget - $1,500 max for the LCR ($500 ea). Surrounds somewhere in the neighborhood of $250 ea max. That makes me hurt a bit, but I really don't want to upgrade these again anytime soon.
Seating distances - ~13' to 1st row eyes, ~20 to second row eyes, third row bar
Subs - None yet, but I'm leaning towards three large horn subs (something like a 'lil wrecker)
Physical constraints - Not many. The room is roughly 17.5' W x 28' L. Columns will end up around 10"-12" deep.
Amplification - I have two Sherbourn PT-350, 7-channel amps I'll be using to power LCR and surrounds.
DIY ability - I can build just about anything, but I'd prefer something like a flat pack if possible. If I go with horn subs, I'll be building those.
Surround Location - Surrounds will be in columns at around 100-110 degrees (just eyeballing my layout) behind the corresponding row of seats. Rear surrounds on the back wall also in columns. Both are well away from the corners.
Seating width - No more than 131" - Two rows of four seats plus the back bar
Aesthetics - I'm planning to hide all the speakers either behind an AT screen/screenwall or in the columns
SPL - I don't have a particular number in mind. Everyone seems to shoot for reference, but I don't have any experience with that, and I understand that can be a bit much.