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Enclosure designing...please help me!!
Enclosure designing...please help me!!
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Old 22nd January 2019, 10:45 AM   #41
nirupambhowmick is offline nirupambhowmick  India
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Quote:
Originally Posted by GM View Post
Actually, there is ; 100 WT woofer [scroll down]: Sweton -Transducers Since 1982 ::Woofer Series - Pro Loudspeakers || Home Loudspeakers

Note that when using Sd, Re, Mmd, BL to calculate specs, they're quite a bit different according to Hornresp, though in power sims are identical when tuned to the lower Fs:

Fs = 45.82 Hz
Qes =0.54
Qms = 5.10
Qts = 0.49
Vas = 53.97 L

If true, with a 0.7 mH @ 1 kHz, this implies an above average quality.

Assuming a reasonable 5 mm Xmax, peak power is limited to its 200 W peak music power when tuned to Fs, so not much low bass, but plenty of mid-bass for 'slam'/'punch' [the original 'low bass' on vinyl, etc..].

GM
Hi ! i have made the cabinet(vented), but it sounds horrible...very low bass, blurred & not satisfactory.
Inner dimensions are 18inch high- 11.75inch width- 10.5inch depth(1.2cuft approx). it has 22inch long 2inch dia port.
Very disappointing result.
i am going to seal it.....
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Old 22nd January 2019, 10:48 AM   #42
nirupambhowmick is offline nirupambhowmick  India
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Originally Posted by xrk971 View Post
My mistake - you have over 1cu ft and as you say, about 1 cu ft after deduction of bracing and driver etc. just go with 3in vent then, but okay around with 5ohm to 6.8ohm resistor an d see what sounds best to your ears. 1mH choke with 20ga copper is not expensive.

You can split into 2 smaller vents - match cross sections area. If not you can adjust length. Play with it and see what sounds good.

Plot just shows whatever name I save file as but not what I actually ran, as it is modified on the fly.

Even ferrite core can work. This one is 0.5ohm DCR and passes 3amps.

5pcs/18mm 6826D 1MH 0.5 Line 3A Iron core Magnetic ring inductors Annular Winding inductors-in Inductors from Home Improvement on Aliexpress.com | Alibaba Group

Here is air core:
Jantzen 1056 1.0mH 20 AWG Air Core Inductor 696554349636 | eBay
Hi ! i have made the cabinet(vented), but it sounds horrible...very low bass, blurred & not satisfactory.
Inner dimensions are 18inch high- 11.75inch width- 10.5inch depth(1.2cuft approx). it has 22inch long 2inch dia port.
Very disappointing result
i am going to seal it.....
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Old 22nd January 2019, 10:53 AM   #43
nirupambhowmick is offline nirupambhowmick  India
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Join Date: Mar 2017
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Originally Posted by perceval View Post
f

Why the 1 cubic foot limitation?
Actually it has 1.2cft inner volume.
with vented enclosure the result is very disappointing
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Old 28th January 2019, 08:41 PM   #44
nirupambhowmick is offline nirupambhowmick  India
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Hi everyone! i have made the box sealed. the result is very good & i mean it (at least to me & i am not a truly audiophile guy). Clean sound reproduction with punchy bass! :-) Thousand times better than with vent. Thanks to XRK audio & others.
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Old 29th January 2019, 12:17 AM   #45
GM is offline GM  United States
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Quote:
Originally Posted by nirupambhowmick View Post
Hi ! i have made the cabinet(vented), but it sounds horrible...very low bass, blurred & not satisfactory.
Inner dimensions are 18inch high- 11.75inch width- 10.5inch depth(1.2cuft approx). it has 22inch long 2inch dia port.
Very disappointing result.
i am going to seal it.....
I can imagine! You tuned it ~a half octave higher than I recommended, to the point where it was almost a 'one note' boom box, though even with mine, some folks would have added some extra stuffing in the cab to tone it down a bit more.

Regardless, sealed is almost always going to be the best choice overall when the box is acoustically too small for the driver.

GM
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Old 29th January 2019, 12:35 AM   #46
GM is offline GM  United States
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Originally Posted by nirupambhowmick View Post
Clean sound reproduction with punchy bass! :-) Thousand times better than with vent. Thanks to XRK audio & others.
Actually, 'punchy' mid bass as the bass is steeply rolled off whereas your vented [shadow trace] had a ~ +6 dB peaking [AKA 'one note'] in the mid bass, then dropping at a much faster rate than sealed.

GM
Attached Images
File Type: png Sweton 100 WT sealed Vs vented in ~1 ft^3.PNG (53.7 KB, 98 views)
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Old 1st February 2019, 07:34 AM   #47
nirupambhowmick is offline nirupambhowmick  India
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Originally Posted by GM View Post
Actually, 'punchy' mid bass as the bass is steeply rolled off whereas your vented [shadow trace] had a ~ +6 dB peaking [AKA 'one note'] in the mid bass, then dropping at a much faster rate than sealed.

GM
Hi...actually i can make amplifiers but had zero
knowledge about speaker enclosure!
this forum is very helpful.
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Old 1st February 2019, 09:36 PM   #48
GM is offline GM  United States
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I assumed as much, hence the response, though there have been folks that know 'stuff' yet will play dumb to see how much 'we' know and/or hope some 'new' useful tidbit will get posted.

GM
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Old 5th February 2019, 06:30 PM   #49
nirupambhowmick is offline nirupambhowmick  India
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Originally Posted by GM View Post
I assumed as much, hence the response, though there have been folks that know 'stuff' yet will play dumb to see how much 'we' know and/or hope some 'new' useful tidbit will get posted.

GM
No...i am not. it's nice to meet you. bye friend.
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Old 6th February 2019, 07:25 PM   #50
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Same here, have a better one......
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