Originally Posted by CamR
Impressive! Is that a SEOS-12 or SEOS-15 there? Is the Tempest essentially a separate enclosure? What XO do use? Do you have build page or plans available?
You could use either a SEOS-12 or a SEOS-15, I went with the 12 cause it was cheaper and I was building 7 of them so cost was a factor.
Each UM-15 It's in their own sealed 2.1cuft chamber inside the speaker.
The top is a standard DIYSoundGroup XO that I built externally, so that it would be optional for active or passive amplification, cause i'm anal like that.
I could have used the analog XO's in the XSP-1 but I chose to use a digital DCX instead, as it clashed with my TRUE XX.4 design; not for SQ reasons. The DCX is much more flexible but has the extra ADA step.
You don't need a DCX or miniDSP unless you want stereo bass out of each speakersub, like my system has.
LFE from your AVR will be mono-summed or a dedicated movie track (i.e. also mono).
My speaker build link in my sig has more details of the build.
My system is a true x.4, so I have (more than) stereo bass.
So when I play a song like this, it plays in the correctly intended phase.
So if mono LFE AVR users tried to play this song here, they would just get nothing coming out of their subs.
Where as my system, play it correctly: