8" or 10" TH, but what driver? - diyAudio
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Old 12th July 2011, 03:06 PM   #1
oLjud is offline oLjud  Sweden
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Join Date: Apr 2010
Location: Örnsköldsvik
Question 8" or 10" TH, but what driver?

Hi all,

Since I completed the THAM15 (with B&C 15TBX100, tuned to ™~35Hz) for my younger brother I wanted to build me a pair TH for myself, but more apartment-friendly in it's impact-force. Thereby the choice of woofer-size ended up on 8-10", which should give a great power sound without being to brutal for apartments.

I'm looked on some drivers but aren't really sure what to look for. What I seen is that "PA" woofers tends to have a high Fs for 8-10" woofers, and "hifi" woofers tends to have to low Fs instead.

My goal is to build an TH with f3 at approximately 35-40Hz, same as THAM15.

Would be grateful for any suggestions of drivers to take a closer look at.

Best regards
Mikael
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DIY-project: 2x BC 8BG51/speaker with Beyma CD10Fe+TD194. THAM15. Open baffle with 2x alpha15/side
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Old 12th July 2011, 03:24 PM   #2
jbell is offline jbell  United States
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can you get eminence drivers where you are?

eminator 2512 in a 17x20x22 cabinet is 'house friendly size' although has the ability to hit some serious spl (130db in a corner) and is f3@40hz, high pass at 35hz.

Google for it, you'll see it has 'pa driver' parameters, but it is marketed as car audio.
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Old 12th July 2011, 03:26 PM   #3
oLjud is offline oLjud  Sweden
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Eminence drivers are no problem to get, have 4 (alpha 15a) already
Will look into it later this evening!

Thanks!
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Old 12th July 2011, 04:43 PM   #4
oLjud is offline oLjud  Sweden
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Hmm Eminence 2512 is a 12", not an 10". 12" is to big for me...

What about "Beyma 10MWNd" or "Seas CA22RNY 8"?


PS, I don't have windows installed yet, just bought an iMac... so i can't simulate anything in Hornresp at the moment
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DIY-project: 2x BC 8BG51/speaker with Beyma CD10Fe+TD194. THAM15. Open baffle with 2x alpha15/side

Last edited by oLjud; 12th July 2011 at 05:01 PM. Reason: instead of a third post
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Old 12th July 2011, 05:02 PM   #5
jbell is offline jbell  United States
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Yea it is... it's just one I've actually built and tested recently. Eminence Eminator

What overall dimensions are you looking to hit? This is pretty small at 17x20x22, and so I thought of it. I did do some messing around with the titanic 10 in a pretty low tuned TH, but it would be lower than your stated goal of 35-40hz.
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Old 12th July 2011, 06:41 PM   #6
jbell is offline jbell  United States
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Looks like the beyma is about a drop in for the eminence in the cabinet I referenced above. you're good up through 200watts (40v)
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File Type: jpg beyma.JPG (50.0 KB, 209 views)
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Old 12th July 2011, 07:10 PM   #7
oLjud is offline oLjud  Sweden
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not to bad, i guess that 130dB in an apartment is enough haha

Haven't decided what max size the enclosure can have, but the smaller the better..
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Old 12th July 2011, 07:49 PM   #8
jbell is offline jbell  United States
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Well, loud, low, small -- pick any two. Your original question was for 35-40hz (pa style) response in non PA environment (apartment) So, it wasn't a typical request, that's why I chose the small PA horn that I've used in dance studios. I was assuming you wanted loud and would be willing to annoy your neighbors.

If you don't need loud (apartment) why not go for low and small?

I can highly recommend lilmike's 25hz tapped horn. Reed Exodus Anarchy 25hz Tapped Horn - AVS Forum

While you may not be able to get the exodus, you can find other 6.5's or 8's that will model well in this cabinet. (you can get tang band?) Widening the cabinet to 8.25" panels instead of 7.25" panels allows an 8 to fit nicely. And since you will need to remodel in hornresp for whatever driver you settle on -- no big deal.
is small and low like this an option?

Edit:

I checked, the tang band w8-740p works in the above lilmike cabinet with your 35hz requirment with 2 modifications.
1. Eliminate the last fold. Where you see the driver access panel -- that's your opening, the end of the horn, eliminate the entire last fold.
2. make interior panels 8.25" wide.

mike -- hope you don't mind the modifications.... I kinda hacked up your drawing a bit for clarification....
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File Type: jpg lilmike-modified.JPG (73.6 KB, 192 views)

Last edited by jbell; 12th July 2011 at 08:19 PM.
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Old 13th July 2011, 08:44 PM   #9
oLjud is offline oLjud  Sweden
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Join Date: Apr 2010
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I don't wanna go lower since I whould not be required for my kind of music, and it would annoy my neighbors to much with lower response.
Tang-Band is possible to get. That drawing are more like I was looking for.

I will install Hornresp this weekend and do some simulations on some woofers.
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DIY-project: 2x BC 8BG51/speaker with Beyma CD10Fe+TD194. THAM15. Open baffle with 2x alpha15/side
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Old 13th July 2011, 08:56 PM   #10
jbell is offline jbell  United States
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I did a bit of cleanup on that drawing from lilmike in case you were interested, and did a couple quick hornresp with the TB and a cheap dayton audio driver.

I think either would probably be enough to 'entertain' your neighbors. Keep in mind these are 0.5pi (corner loaded) simulations.
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