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post #1 of 282 Old 04-17-2019, 04:39 PM - Thread Starter
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Jk’s htm-8, mbm-12 towers

A very good friend came over the other day and very nicely asked me to sell him my entire 893 setup I just built with subs. So I sold the setup. That leaves me a hole to fill in the living room. Hence this new build. Towers with htm-8’s on top of 12” mbm’s. This will be all one box, separate section sealed between the woofer and the htm. I got the idea when seeing all the builds lately where the baffles are being chopped up and used as needed. So I’ll be cutting off the roundovers and using the baffles I now have. Upper section will be ported as designed, and the lower will be ported via slot port 2” tall, 13” wide, and 24” long. Netting a 28hz tune. Should be fantastic for 2 channel music. Much more to come.
Overall dimensions are 16x15x42
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post #2 of 282 Old 04-17-2019, 04:59 PM - Thread Starter
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Jk’s htm-8, mbm-12 towers

HTM-8, MBM-12 TOWERS

Total size, 16’’ wide, 15” deep, 42.75” tall
Port is 13X2X24’’. Box tune of 28Hz with cf deducted as follows
1cf for HTM-8 area, .5cf for port
Starting at 4.67cf takes it down to 3.17cf net.

Baffle panel for the HTM-8 will be cut to fit the cabinet with ports remaining front firing. Bottom will be separate chamber for the woofer, as well as amped separate. HTM-8 crossover will stay as is. As long as the port velocity and spl and 1st port resonance is good, ill start ordering up this cabinet cut to size asap. There’s a pile of diysg boxes on my front porch as we speak, so naturally I’m getting excited for another project.


TOTAL SIZE 16 wide 15 deep 42 3/4 tall

[email protected] 15X42 3/4’’ sides
[email protected] 14.5X42 Backs
[email protected] 14.5X15 Bottoms
[email protected] 14.5X22.5 Fronts
[email protected] 14.5X14.25 Tops
[email protected] 2X14.25 Bottom rails
[email protected] 2X13.75 Back rails
[email protected] 14.5X12.25 Port bottom
[email protected] 14.5X13 Port backs
[email protected] 14.5X10.75 Bottom braces
[email protected] 14.5X13.5 Upper braces
[email protected] 14.5X16 Upper chamber back
[email protected] 3/8X16 Baffle flanks

Baffle will be 16” tall, 11 3/4 wide after modifying

Last edited by Jk7.2; 04-17-2019 at 05:33 PM.
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post #3 of 282 Old 04-17-2019, 05:27 PM
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What DSP you gonna use to ensure they blend well?


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post #4 of 282 Old 04-17-2019, 05:29 PM - Thread Starter
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Jk’s htm-8, mbm-12 towers

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Originally Posted by EndersShadow View Post
What DSP you gonna use to ensure they blend well?


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The htm8’s will be on the stock crossover, and the mbm12’s will be on an inuke. So it will be just like tuning mains to subs. Only difference is it will be all on one box. Obviously Bi-amp with two terminals per cab. Or one 4 pole speakon. Yeah, speakon is the way to go here.
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post #5 of 282 Old 04-17-2019, 06:01 PM
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Quote:
Originally Posted by Jk7.2 View Post
The htm8’s will be on the stock crossover, and the mbm12’s will be on an inuke. So it will be just like tuning mains to subs. Only difference is it will be all on one box. Obviously Bi-amp with two terminals per cab. Or one 4 pole speakon. Yeah, speakon is the way to go here.


Makes sense to me! Should be fun!

I need to get some MBMs for my garage at some point to pair with a EP4000 (30hz crossover engaged) and some older Mission 700 bookies.....


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post #6 of 282 Old 04-17-2019, 06:32 PM
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You unloaded the 893s and the subs??

Looking forward to this...
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post #7 of 282 Old 04-17-2019, 06:47 PM - Thread Starter
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Originally Posted by smcmillan2 View Post
You unloaded the 893s and the subs??



Looking forward to this...


Yeah. But I bought 4 more of the closeout 15” woofers from Erich for future projects. I loved them that much.
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post #8 of 282 Old 04-17-2019, 06:48 PM
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This should be quite interesting!


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post #9 of 282 Old 04-17-2019, 06:52 PM
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After hearing so many kits you chose the HTM 8. That says a lot about that model.

Considering the mbm woofer will be so close to the htm8 you might be able to seal the HTM and run the mbm up to 150-200hz. That could save a little cab space. The mbm12 should do 150hz better than the htm8. And you will have full control over the 12. Just a thought. If that was built as a true 3 way the 12 would be run up plenty high enough to seal the mid.
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post #10 of 282 Old 04-17-2019, 06:57 PM - Thread Starter
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Originally Posted by Samps View Post
After hearing so many kits you chose the HTM 8. That says a lot about that model.



Considering the mbm woofer will be so close to the htm8 you might be able to seal the HTM and run the mbm up to 150-200hz. That could save a little cab space. The mbm12 should do 150hz better than the htm8. And you will have full control over the 12. Just a thought. If that was built as a true 3 way the 12 would be run up plenty high enough to seal the mid.


Interesting idea. I didn’t really want to alter the original design. And as it is now, the tune is low enough and box a reasonable size. Plus I can play with crossovers and such in the avr.
Thanks to @eng-399 again for running the sim for me. Everything checks out in winisd.
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post #11 of 282 Old 04-17-2019, 07:00 PM
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It’s kinda like a tweaked Maximus 12 speaker IIRC


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post #13 of 282 Old 04-18-2019, 03:56 AM
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Quote:
Originally Posted by Jk7.2 View Post
This will be all one box, separate section sealed between the woofer and the htm. I got the idea when seeing all the builds lately where the baffles are being chopped up and used as needed.
Placing your subs in the spot your speaker stands would have been rarely results in the best possible bass reproduction in a room. This is effectively what you're doing.
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post #14 of 282 Old 04-18-2019, 03:57 AM - Thread Starter
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Jk’s htm-8, mbm-12 towers

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Originally Posted by Stereodude View Post
Placing your subs in the spot your speaker stands would have been rarely results in the best possible bass reproduction in a room. This is effectively what you're doing.


Thanks bro. It worked great with subs exactly where these towers are going. As a 2 channel setup it will rock where the towers sit. I could also pop a sub in behind the couch if I really need to.
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Last edited by Jk7.2; 04-18-2019 at 04:09 AM.
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post #15 of 282 Old 04-18-2019, 04:34 AM
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Jared, Jared, Jared!! The crowd chant's loudly, dude your a DIY animal, subscribed.
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post #16 of 282 Old 04-18-2019, 04:38 AM - Thread Starter
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Jk’s htm-8, mbm-12 towers

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Originally Posted by mtbdudex View Post
Jared, Jared, Jared!! The crowd chant's loudly, dude your a DIY animal, subscribed.


Hahaha thanks Mike!
Whenever you guys get tired of my build threads, I’ll stop posting. Just let me know.

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post #17 of 282 Old 04-18-2019, 05:20 AM
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Thanks bro.

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post #18 of 282 Old 04-18-2019, 05:47 AM
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Originally Posted by Stereodude View Post
Placing your subs in the spot your speaker stands would have been rarely results in the best possible bass reproduction in a room. This is effectively what you're doing.


Theoretically yes, but in a living room setup you have limited options and this should be awesome for what Jared’s aiming for!
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Theoretically yes, but in a living room setup you have limited options and this should be awesome for what Jared’s aiming for!


Correct. If this was a dedicated HT setup, then I wholeheartedly agree. But for the living room, we still have to do the living part.
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post #20 of 282 Old 04-18-2019, 05:59 AM
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You are a freaking mad man! Jared is going for the "Most DIYSG Builds Ever" award. Can't wait to see how these turn out!
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post #21 of 282 Old 04-18-2019, 06:26 AM - Thread Starter
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You are a freaking mad man! Jared is going for the "Most DIYSG Builds Ever" award. Can't wait to see how these turn out!


Thanks man. Want to see my list?
3 Cinema 10’s
2 12” mbm’s
3 Titans
3 1099’s
2 1299 towers
4 volt 10’s
4 volt 6’s
2 htm-6’s
3 893’s
2 closeout 15” subs
Now 2 htm-8 towers with mbms
And 2 more closeout 15 subs gettin built.
I think that’s it.

And around 15 more sub builds that didn’t have to do with diysg.
I’m getting up there. Lol
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Yeah. But I bought 4 more of the closeout 15” woofers from Erich for future projects. I loved them that much.
sleeping and resting is overrated huh?

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Thanks man. Want to see my list?
3 Cinema 10’s
2 12” mbm’s
3 Titans
3 1099’s
2 1299 towers
4 volt 10’s
4 volt 6’s
2 htm-6’s
3 893’s
2 closeout 15” subs
Now 2 htm-8 towers with mbms
And 2 more closeout 15 subs gettin built.
I think that’s it.

And around 15 more sub builds that didn’t have to do with diysg.
I’m getting up there. Lol


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post #24 of 282 Old 04-18-2019, 03:43 PM
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what are you going to use for a crossover? AVR? iNuke?

Will these be veneer on all sides including the front?

These are going to be really cool

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post #25 of 282 Old 04-18-2019, 03:55 PM - Thread Starter
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Jk’s htm-8, mbm-12 towers

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Originally Posted by brian6751 View Post
what are you going to use for a crossover? AVR? iNuke?



Will these be veneer on all sides including the front?



These are going to be really cool


Yes I’m gonna veneer the baffles. Thanks Brian!
And yes on the crossovers. Avr for the top and inuke for the bottom.
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post #26 of 282 Old 04-18-2019, 04:09 PM
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A passive crossover option for some of the designs to the MBM's would be cool. HTM-8 definitely seems like a good match. Helix dome would be as well
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post #27 of 282 Old 04-18-2019, 04:11 PM
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Originally Posted by Jk7.2 View Post
Yes I’m gonna veneer the baffles. Thanks Brian!
And yes on the crossovers. Avr for the top and inuke for the bottom.
I wonder how the magnum-12 woofer would do with a passive radiator... ? hmmmmm

https://www.parts-express.com/dayton...iator--295-504

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post #28 of 282 Old 04-18-2019, 04:50 PM - Thread Starter
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I wonder how the magnum-12 woofer would do with a passive radiator... ? hmmmmm



https://www.parts-express.com/dayton...iator--295-504


Well I know it does awesome with a port! I think these are gonna be sweet. Especially with a possible sub in the back corner.... that would be cool.
I’m gonna veneer the fronts too because I’m piecing together the baffle and the port area will be mdf endgrain. Too hard to deal with. Veneer hides everything! as long as it sticks. That I have figured out by now.
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post #29 of 282 Old 04-18-2019, 04:59 PM
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Can’t wait to see the progress on the build!
Ditto!
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post #30 of 282 Old 04-18-2019, 05:01 PM
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Geez jk7.2, you have a very high liked to post ratio! Excellent work!
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