HT subwoofer cont.. (1 Viewer)

[Relic1Golf]

I love my DIY Eminence lab12 but like a drug I need more bass. this might be more for the DIY crowd but for music fidelity and LF effect would I be better off with a Dayton DVC 15 in 3.0ft3 sealed enclosure or the lab12 in a 3.4ft3 ported enclosure tuned to 24hz, either one would be powered by a 500w bash amp cut off at 100hz for bookshelf speakers. I put both in WinISD but that only gives you the freq range SPL and max excursion?

 

[Robert_J]

Post your response graphs.

I haven't dealt with the 15" DVC but I have used the 12" version in a few different builds. The DVC has more excursion than the Lab. Both are made by Eminence so quality is the same.

 

[John Garcia]

Build a second identical one to the current? Or dual driver build?

 

[Relic1Golf]

2 closed lab12 drivers still only have an f6 of 30hz but some pretty serious SPL for sealed 12s once you figure room gain about 115db peak.
I really want to reach down to 20hz, the ported lab12 and sealed DVC15 can both do so but in a different way. From an observation the DVC15 has a lower group delay but it might be harder to cross over with bookshelf speakers b/c the size of the drive. The lab12 has a high group delay but it isn’t extreme by any means. Eminence recommends a high pass filter but my current 500w bash amp doesn’t have one unless its internal.

 

[John Garcia]

Depends on how well the design does above about 100Hz and where you're crossing it, so the mains can matter too - if you can cross them lower, then that becomes less of an issue as you get into the range where the sub does better. My former Adire Tempest / vented Sonotube never had problems blending, and it was tuned to 17.5Hz. Current Empire is dual 15" sealed and blends really well and gets down to 16Hz but isn't nearly as convincing in the low 20s and below as my vented was. That's the tradeoff with sealed in most cases, less rumble for that clean sound and I prefer that clean sound.

 

[Robert_J]

Eminence recommends a high pass filter but my current 500w bash amp doesn’t have one unless its internal.

Where did you get your BASH amp? PE ones have it set at 20hz I think. O Audio had an adjustable one.

PE BASH boost and HPF tables - http://www.parts-express.com/pedocs/specs/300-752-bash-specifications-45313.pdf