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Multi-Way Conventional loudspeakers with crossovers

Small active 3-way floor stander with a punch
Small active 3-way floor stander with a punch
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Old 18th September 2018, 10:58 AM   #11
bushmeister is offline bushmeister
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Join Date: Sep 2012
If depth is an issue when mounting two on the sides why not two Dayton LS10-44s ?

Dayton Audio LS10-44 10" Low Profile Subwoofer Dual 4 Ohm

They will work nicely in 12 litres or so sealed per driver and only have a 3.3" depth.
Cross them at 80hz, and job done!
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Old 18th September 2018, 02:52 PM   #12
DannerD3H is offline DannerD3H  Denmark
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Join Date: Jun 2013
Location: Denmark
Hello bushmeister,

I have briefly been looking at that driver as well, but my simulations in winisd yielded 14L pr driver(Unibox says 10 can do with heavy stuffing).
Do you have any experience with this driver yourself? Or Dayton in general?
I haven't looked further at it because I thought it wasn't a "HiFi" subwoofer. Are those flat subwoofers capable of delivering decent sound quality and not just boom?
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Old 18th September 2018, 03:27 PM   #13
bushmeister is offline bushmeister
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I haven't used them but here are some decent measurements to peruse!

Test Bench: Dayton Audio LS10-44 and LS12-44 Shallow-Mount Subwoofers | audioXpress

I wouldn't use them above 90hz.
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Old 19th September 2018, 12:39 PM   #14
DannerD3H is offline DannerD3H  Denmark
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Thank you for the link!

There is either something wrong with their specs or i am unable to do simulations.. He is writing that 12,7L gives a Qtc of 0,7 wheras my sim say 19L. But if it is true that they only need 12,7L then it may be a good solution.
I am planning on cutting them at 80 Hz.
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Old 21st September 2018, 07:41 AM   #15
DannerD3H is offline DannerD3H  Denmark
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Okay so i have been looking on subwoofer drivers again. Considering your advice on back to back woofers I think i ditched the Vifa and is back with flat drivers. However, I have compared the Dayton to my original SB choice and I think I will be going with the SB driver:
"SW26DBAC76-3-DV"

I somehow trust it more, and the simulations are better. Two of these SB'drivers will fit in 20L with Qtc of 0,685 whereas two daytons would have a Qtc of 0,852 in 20L.
I laso talked to Hypex on how much power the amps can deliver at different ohm loads as this was important for mi choice of the Dual Voice coil version of the SB woofer. Two SB woofers should deliver 97dB @ 30Hz and the two Daytons will deliver 93dB @ 30Hz.

I will start out by buying two of the SB drivers, one for each speaker and the possibility to test the benefit of having two drivers in one cabinet. If I can hear it is worth it then I will buy two more. The cabinets will be designed for two drivers mounted back to back.
Also the cabinet design will change again.. I will just make it as one combined unit, this will allow me to move the Amp down to the bottom of the speaker, simpler design and more volume for the Sub's.
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Old 22nd September 2018, 12:07 PM   #16
DannerD3H is offline DannerD3H  Denmark
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Here are some updated design images!

Click the image to open in full size.
Click the image to open in full size.

Click the image to open in full size.Click the image to open in full size.
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Old 22nd September 2018, 01:14 PM   #17
bushmeister is offline bushmeister
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It would be best to physically join the backs of the subs - with a brace or something- this is what allows the force cancelling to work.

In my subs the enclosure is a cylinder so the frame of each driver is directly connected to the other by the cylinder, but I also had threaded tensioning rods too. This results in a solid driver-driver coupling and complete force cancellation as a result.
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Old 22nd September 2018, 03:26 PM   #18
DannerD3H is offline DannerD3H  Denmark
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Hmm.. I reconsiddered my bracing and I just changed the design of the bracing structure slightly. Now i think my cabinet and barcing will act almost like your cylinder cabinet.
Since my woofers are sliightly off angle i cannot use threaded rods through them, but i am convinced that this design will give a pretty solid woofer to woofer connection.

The red lines on the first image show how the woofers are connected top and bottom. The second image shows where the connections are - also the front and rea plate connect the woofers.

This is a square "cylinder" with holes.. Of-course not as strong as a full cylinder, but i am sure it is strong enough!
Attached Images
File Type: png Woofer cross section.PNG (288.7 KB, 222 views)
File Type: png Woofer cross section - side.PNG (361.2 KB, 39 views)
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Old 22nd September 2018, 04:18 PM   #19
nipper1 is offline nipper1  United States
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Quote:
Originally Posted by bushmeister View Post
Hi Danner, for music a single 10" woofer/sub should be fine as long as it has reasonable x max. Also as long as your cabinets are solidly constructed and heavy, dual opposed is not essential - but it sure is nice!

My subs are overkill for most stuff, but with some music and most movies they really shine!
I just yesterday started playing with my "sub". I am using a single "9 inch" SB model SB23MFCL45-4 4 Ohm subwoofer driver with a Hypex DS 2.0 plate amplifier. Currently, I am trying this in a closed box about 0.85 ft.^3 (24 L). I have some more work to do yet but I think this small, closed box will be plenty good enough for my smallish listening room. NOTE: My amplifier sub-out jack is at a fairly low level; the Hypex wasn't getting loud enough (175 Watts into 4 Ohms is plenty of power!) so I had to add an in-expensive (15 dB gain max with a variable/level control) pre-amp between the sub-out jack and the Hypex low level inputs. MUCH better; now I am getting full output! I listened to some pipe organ music and also used some free test tones; I have plenty of SPL down as low as 16 Hz! The nice thing about this Hypex is that it has an infra-sonic filter FIXED at 12 Hz. If you have a small to medium small room, this is a good combination, not too expensive or large. The SB sounds great; realistic, not like those cheap big box store HT subs that are just glorified boom boxes! Cheers! (PS, my Hypex model is now apparently discontinued!)
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Old 10th October 2018, 02:41 PM   #20
DannerD3H is offline DannerD3H  Denmark
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Default It is TIME!!

Hello nipper, Thanks for the input! Glad to hear more good things about SB!

It is time! I will start building on saturday!

I have one small question (more will probably follow xD). How do you guys seal the holes for internal wiring?
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