Using PA subs for a midbass modules?

There were many people using the Behrinher 1200D for midbass duty, I forgot which thread it was. Probably the tactile response thread.

MKtheater said:

There were many people using the Behrinher 1200D for midbass duty, I forgot which thread it was. Probably the tactile response thread.

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Oh cool. I was looking at passives ones so i dont need to run rca i have 4 unused lines and some dsp amps doing nothing. I just saw the diy titan modules those are pretty cheap in comparison...or i could just get better subs?

lemonslush said:

Oh cool. I was looking at passives ones so i dont need to run rca i have 4 unused lines and some dsp amps doing nothing. I just saw the diy titan modules those are pretty cheap in comparison...or i could just get better subs?

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Get a couple of the PA460's while PE has their Labor Day sale - prob $90 each, 4 cf. tuned to 30hz I think is what some have been doing for mid-bass with those. Or the buyout B-52s.

MKtheater said:

There were many people using the Behrinher 1200D for midbass duty, I forgot which thread it was.

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Here:
https://www.avsforum.com/forum/113-...-mbm-increased-mid-bass-tactile-response.html

I read through (a little) of that TR thread and it stated that there is more TR near port tune..... I’m looking at building pa cabinets also for a 60-150hz purpose which makes me question the 30hz tune. Wouldn’t you want to increase the port tune (if box size doesn’t matter) to a more respectable number like say 45hz for MAXIMUM TR? I know by doing this you create a higher peak in frequency response rather than a smoother flatter response but what are the exact trade offs? Especially if max TR between 60-200 is the goal.

Seeing as that type of response curve is easy to achieve with any sub I've ever had, I can only assume it's even more extreme...

The trick is having it nearfield so you can feel the tr.
And it's usually set up out of phase so that it doesn't affect the fr.

And/or go with some variation of the BOSS:
https://www.avsforum.com/forum/19-d...gn-construction/2991522-hideaway-theater.html

I agree... I just wanna see how un-flat their curves are. Most people strive for some sort of flatness... with maybe a house curve, sloping up to the left.

Or what about I just add 5 more 18s ? instead of the mid bass drivers
That HST-18 MKIII sale is rather tempting...Kinda pricy still 3k for 6 is money I Kinda rather spend that on a new 4k projector and AV

lknhomeaudio said:

I'm still waiting to see the weird looking in-room response curve in REW ]

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I think (as an amateur) TR and spl is NOT a direct comparsion. I think it is more of a conversation of utilizing the full potential of said driver to run inside its passband to achieve its full potiential.
Ever been to an outdoor concert where you can feel the kick drum from across the street? Giant concert venues use the best equipment to achieve the best results while staying within a flat response.
So, why would you use a ultimax to play midbass and why would you use a pa to play ulf? Answer: you wouldn’t.
To me this would be just utilizing the proper speakers to the best of their ability, NOT trying to boost the frequency to achieve a desired result.
Or am I wrong?

Red Five said:

If the determination is TR is from particle velocity this has a HH tuned around 30Hz and then the front horn is tuned around 70Hz or so which has a particle velocity.

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Okay, now we’re talking. Would this work with the pa460? And what size box are we talking about? Looks like this will play from 30 to 200? So, if I couple this with my dual f20’s at about 60hz this should probably blend in quite well (for a horn) and still be able to play up to my HTM12’s with plenty of overhead. I’d like to know more.... I do like TR and overhead in the same sentence.

Audiophile75 said:

Okay, now we’re talking. Would this work with the pa460? And what size box are we talking about? Looks like this will play from 30 to 200? So, if I couple this with my dual f20’s at about 60hz this should probably blend in quite well (for a horn) and still be able to play up to my HTM12’s with plenty of overhead. I’d like to know more.... I do like TR and overhead in the same sentence.

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Yes the cabinet would work with a PA 460. I forgot the exact dimensions, I think it is 43x21x30. Power handling on the 460 is less. I will dig up more info when I get a chance again. It should be easy to integrate using a MiniDSP or a DSP amp.

Audiophile75 said:

And what size box are we talking about?

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Here's two.
https://www.avsforum.com/forum/155-...-beast-mode-devastator-build-integration.html

Audiophile75 said:

21” is perfect. 30” doesn’t work (it’s the reason why I moved my f20’s) but I have up to 60 something inches to stretch this to so.... can we shrink the 30” to a more manageable size? I’m going to lay these down and put my htm’s on them for the RL. Let me know what you come up with, and if it’s a more manageable size for me I’m in.
View attachment 2609980

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What's your max depth and the max you can go up on the tune? I still have to fit the sub and make the vent hit a power target with air velocity not going to heck. It can get taller, it's just a less elegant box since the length of the front determines the peak of the upper response. It ends up being a box with a cubby over the front chamber if the resonator is shorter than the box dimensions dictate. The longer the resonator gets, the peak appears lower in the response. This is a 95cm resonator, Dev v1 is 110cm and BMD is 140cm ish. If the box gets wider the front resonator gets shallower, along with the box in general.