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speaker enclosure for dayton audio ps180 driver
speaker enclosure for dayton audio ps180 driver
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Old 13th November 2019, 10:21 AM   #1
woodo is offline woodo  Australia
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Join Date: Jun 2018
Default speaker enclosure for dayton audio ps180 driver

hi,
i bought a pair of these speakers and seek opinions on a practical enclosure to build. I have an average size room and will be paired with a 300b amp of about 6 watts. after previously having Chris Rogers Pro9TL s I realise I am compromising on the low frequencies but I can live with that. I have had a play with unibox and LDC7 and trying to grapple with @schmeet TL program. if the driver is suitable i wouldn’t mind putting together a TL like a scaled up Lance. speaker specs https://www.parts-express.com/pedocs...on%20Sheet.pdf
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Old 14th November 2019, 12:31 PM   #2
woodo is offline woodo  Australia
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I had a go at using Hornresp for a reasonable size enclosure for the PS180. Seems very intuitive program. I need to learn more of course including especially internal filling with wadding etc. So far have left it empty. I followed the quickstart instructions from A better TL alignment by Peter. For my Fs of 58.5 hz my line length is about 1.8m? - for 3 tapered sections of 600mm which I subsequently reduced to 500mm. The PS180 specs mention useful low frequency of 48hz, so I wonder if I should use this value instead.

I tried a 3:1 and 5:1 taper (shown here). Seeking advice on any other things I should consider. regards.
Attached Images
File Type: jpg dayton ps180 tapered TL1.JPG (83.7 KB, 339 views)
File Type: png dayton ps180 tapered TL2.JPG.png (53.9 KB, 333 views)

Last edited by woodo; 14th November 2019 at 12:39 PM. Reason: errors
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Old 15th November 2019, 08:32 AM   #3
waxx is online now waxx  Belgium
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48Hz is very optimistic with this driver. When i model it in winisd for a ported box, 70Hz is more realistic, at least in a ported enclosure. A TL coud go a bit lower, but not that much. When i do an 48Hz tuned enclosure, the frequency response goes down faster and the F3 is already at 95Hz, and then it stays flat untill 48Hz at -3.5dB...
Attached Images
File Type: png P180-48hz.PNG (53.3 KB, 326 views)
File Type: png P180-70hz.PNG (52.5 KB, 314 views)
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Old 15th November 2019, 10:41 AM   #4
woodo is offline woodo  Australia
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Thanks Waxx. These results are probably more realistic.
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Old 17th November 2019, 03:23 AM   #5
mayhem13 is offline mayhem13  United States
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Unless your using these for nearfield listening, I couldn’t say that I would use these little drivers for anything below 100hz.....there’s just way to much distortion down low and the excursion is going make the whole system very non linear........but a pair of these on a 7x10 inch open baffle paired with a sub?.......now that’s a system I could listen to all day.
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Old 17th November 2019, 09:45 PM   #6
jjasniew is offline jjasniew  United States
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I have a pair of these which I currently have tossed into a pair of KEF Q30 cabinets. Havent even had the chance to measure them, but they sound just fine with my sub set to 50 Hz. The cabs have two isolated chambers, the bottom one I filled with sand, so each speaker weighs 35 lbs - gives the driver something solid (downstairs) to push against. Had to widen the baffle cutouts slightly with the jig saw.

As the Q30 is, apparently, the least valued speaker ever made by KEF, I sold the drivers on ebay to recoup my original investment. The cabs look nice, though all my attention is now on my Lii audio 15" FRs that I'm planning to OB mount.
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Old 18th November 2019, 12:41 PM   #7
woodo is offline woodo  Australia
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Thanks mayhem13 and Joe. i hope i can settle on a box design soon and get onto the build. i’ll probably procrastinate a bit more while i learn about speakers and modelling the results. I like the look of those q30s. reminds me of my old tannoy 611 midrange and concentric tweeters i had some time back.
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Old 25th November 2019, 10:03 AM   #8
woodo is offline woodo  Australia
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Join Date: Jun 2018
I have experimented with the line area, length and filling density and come up with the following plot. There's a largish dip about 400-500 hz the significance of which I am uncertain and in some simulations it does not present. I am seeking any comments on optimising the response as best I can for a smallish box. I am aiming to fit in in a slightly upsized version of the Lance if that is a reasonable thing to attempt.
Attached Images
File Type: png Annotation 2019-11-24 091141.png (124.0 KB, 213 views)
File Type: png Annotation 2019-11-24 091043.png (53.1 KB, 28 views)
File Type: png Annotation 2019-11-25 200637.png (41.7 KB, 27 views)
File Type: png Annotation 2019-11-25 200836.png (80.2 KB, 18 views)

Last edited by woodo; 25th November 2019 at 10:10 AM.
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Old 5th December 2019, 11:02 AM   #9
woodo is offline woodo  Australia
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Join Date: Jun 2018
further sims using Paul Schmeet's software and added stuffing. I've tried to reduce size as much as I can and hope I have not gone too far. Ive drawn a simple box design which the Baby Labs post was the inspiration. Any comments on anything else I could try before I go ahead and build?
Attached Images
File Type: png Annotation 2019-12-05 204335.png (11.5 KB, 23 views)
File Type: png Annotation 2019-12-05 204116.png (103.8 KB, 24 views)
File Type: png Annotation 2019-12-05 204536.png (64.6 KB, 25 views)
File Type: png Annotation 2019-12-05 204643.png (69.1 KB, 18 views)
File Type: png Annotation 2019-12-05 204931.png (69.6 KB, 15 views)
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Old 5th December 2019, 11:19 AM   #10
woodo is offline woodo  Australia
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Join Date: Jun 2018
Default Rough box plan

Box plan
Attached Images
File Type: png ps180-8-small-enclosure-lab.png (70.5 KB, 42 views)
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