I'll just start by saying I'm a big believer in multiple subs ever since adding a second sub about 7 years ago.
Unfortunately I recently had one of my Infinity CSW10 sealed subs burn out a board on me and it is more expensive to repair than it's worth. Ever since going to 2 subs I've been lusting after what 4 subs would do, so this seems like the logical time to do an upgrade.
I've settled on the Sonosub design, but I need some advice on two aspects of the project.
First -Going sealed?
This is a music first system. Group delay sounds scary, but I've never had a ported sub of similar quality to my Infinity CSW10's, so I can't personally speak to the relevance of group delay on sound quality. I just want to convey that sound quality is #1 here.
I also like the idea of going sealed because it will make the project simpler, and I don't have to worry about port noise or getting the tuning a little off from one sub to the next.
4 subs is a bit of a stretch as far as floor space for me, so I'd like to keep the footprint small. Don't want them stupid tall either.
The thing that worries me about going sealed is that I might not have enough spl for a large room of 25x15x8. How much spl do I stand to gain if I simply increase the size of the enclosure? How does enclosure size relate to frequency response in a sealed setup?
Does a ported sub tend to give a natural house curve down to the tuning freq? I like to have about a 4 db rise from 80hz to 20hz and I notice most graphs of ported vs sealed show ported has that low freq bass boost I want.
Second -My plan as of now
4 sealed Sonotube subs 14 inch diameter 3ft tall
4 Dayton audio SA230 amps 230 wpc to 4 ohms, variable phase
4 Dayton Reference RSS265HF-4 10 inch drivers
I want variable phase control for each unit so I can dial them in and maximize output. Is there another choice for a sub amp with variable phase? Are these drivers suitable for a sealed setup?
Thanks in advance, everyone