I'm relatively familiar with HT and Mobile audio, I have recently dipped my toes into the DIY (though thusfar, DIY for me has been DIFM). Mainly due to tools, time, space, patience, hauling materials, patience and time.
My recent setup was Pioneer VSX-1015tx, eD 6t6 towers, eD MTM6 center, Dayton surrounds and a Klipsch RW-12.
Almost a year ago I had someone more involved with DIY build me a 28" BFM Tuba HT (Dayton DVC 385-88 loaded) and I have since added that to my system, i'm currently running that off a Crown Xti2002. LPF @ 18hz HPF @ 78hz.
I recently moved into a large loft so i've added all the audio equipment that i've had all of the years to fill the huge space I now have. I'm doing something I have heard is a no-no, but to my ears and cheapo dB meter, it's louder, so i'm running it for the time being. I split the subwoofer signal at the receiver, one running to the Klipsch, other running to a mixer (voltage output of the receiver is way low for the Crown to drive beyond low listening with every gain cranked) that runs to the Crown which is running my THT and a 2.2 cu^3 Adire Tempest @ 28hz. So I essentially have 3 low end sources at the moment, I have used that to my advantage by placing the THT and Tempest stacked in the front corner, and the Klipsch in the opposing corner which helped eliminate the most significant dead spot in the room. I'm also now running Infinity Beta 60's as my rears/5 channel stereo. I am also now using a Denon AVR-1909.
I'm looking to get past the, what I assume, is a bit of a cluster and unnecessary bottom end configuration. As well as upgrade my front stage in the same swing.
I'm in a pickle and trying to decide what to do here. My current idea is to add a pair of small sized horns focused more on the 40-150hz range, and a pair modest sized cinema speakers to stack and hoping that's feasible as a true full range speaker. (Something like an Autotuba and the DIY Karma-12) for some reason, I like the idea of having a small set of horns up front and still having the big guy in the corner
Or would I be better pressed to do something like a dual woofer version of the Karma's? (hope i'm not leaking info here, but I heard they had some designs of these in the works)
A few other minor questions I have are
...is there a true reason to it being "bad" to mix horns in conjunction with ported enclosures, or even sealed? Is there a non book length to this question?
I've picked up that there is ALWAYS a common answer to this question, but im going to ask anyway, SWAPPING THE SPEAKER IN THE THT... as loud as it is, I want more. As I understand, the crucial parameters in a horn is fs and qts. So I ask you, Dayton DVC vs. SI HT 15", viable option to switch them out for the extra extension that the SI offers?
I have included the driver in question, along with 2 of Bills current recommended drivers
T/s SI DVC Tempest
Re 3.7 2.8 3.5
Fs 18.5 19 18.8
Qes 0.37 0.38 0.4
Qms 6.3 8.66 6.7
Qts 0.35 0.36 0.39
Le 3.5 1.82 2.9
Sd 804.5 829.6 779
Vas 220 232.2 317
BL 18.9 16 14.2
MMS 309 297.1 195
CMS: 0.239 0.24
SPL 87.4 90 89.1
Xmax 22.5 15.1 16.4
Thanks in advance for all your responses