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Old 8th January 2013, 01:18 AM   #11
GM is offline GM  United States
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Quote:
Originally Posted by Richard Ellis View Post
I'd guess what 'GM' is trying to tell you is that..........These car specific subwoofers perform rather poorly.....
Well…….yes and no, the high inductance severely limits it for sealed and typical vented alignments, hence a ‘one note wonder’, but I did note it’s suitable for a TL, which by association includes the MLTL and tapped TL/horn.

Anyway, ‘ran the numbers' for an offset driver MLTL tuned to Fs, which shows plenty of gain, but the driver is so deep I don’t believe it will perform as predicted, so will try some different alignments as time permits.

GM
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Old 8th January 2013, 06:11 AM   #12
pulinsh is offline pulinsh  Latvia
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Originally Posted by Inductor View Post
If you don't plan using a 2500W power amp, yes. A 6" or 8" can do what you're looking for...
Edit: if for a car the low gain/curve it's different.
Look for what I have just said here.
10" cabinet transformation?
well I will use both pioneer d2000 to get as high performance as I can around 2500w. Just I have never made spl box and have no experience with that.
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Old 9th January 2013, 12:09 AM   #13
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pulinsh,
Hi again, and I have to admit I don't know what a "spl box" is. It's that somewhat related to car Audio? I'm only used to very simple home sets.
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Old 9th January 2013, 06:06 AM   #14
pulinsh is offline pulinsh  Latvia
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Originally Posted by Inductor View Post
pulinsh,
Hi again, and I have to admit I don't know what a "spl box" is. It's that somewhat related to car Audio? I'm only used to very simple home sets.
Hi, yes - that is funny ... laugh at new guy ...

ok I will say it simple - help me build box that can give me more than 145 db ... I know about car salon compression measuring and electricity requierments ... but I need help with that box...
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Old 9th January 2013, 02:45 PM   #15
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Hmm, You led us to believe you wanted a sub suitable for music, HT, but you don't need 145 dB except for a 'one note' competition SPL box.

Regardless, you'll either need a lot of speakers and/or a huge horn to hit 145 dB/m if you want it to cover a wider BW than ~one frequency, so of course even more with increasing distance to the listening position. If the room is a vehicle, I suggest you seek out a forum that specializes in this type of speaker system design.

GM
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Old 9th January 2013, 03:50 PM   #16
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I don't know what you need (I'm not used to car stereos) but as a suggestion (noise vs audio) I would go read about sub literature and testing like the π subwoofers. Notice what Wayne Parham says
Quote:
However, the output of a hornsub is significantly higher than a direct radiator, so for larger venues or outdoors, the 12Pi hornsub is ideal. It is large, but the coasters make it easy to load in and out trucks with ramps.
Wayne's 12Pi sub
Pi Speaker Kits Subwoofer Kits
ProSpeakers Forum - ? Speakers 12? v1 - Wayne Parham, October 21, 2007 at 14:56:15
Pi Speakers - Push/Pull Basshorn Subs
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Old 9th January 2013, 07:24 PM   #17
pulinsh is offline pulinsh  Latvia
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well I've buils quite good speaker system, now just need to upgrade that sub - I was thinking about spl, to have some fun, because standart box I had - and it wasn't bad, but I want to try smth else... so I have to try spl... I don't know any other forum that can help me with this thing - as I read some discussions and looked at some pictures first idea was that these guys can build anything ... and sorry for my english - this language isn't my first.
Just looking for some information to start building correctly
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Old 10th January 2013, 02:13 AM   #18
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OK, I increased the size of the one fold cab I simmed earlier to allow for this driver’s depth and the simmed response actually looks a bit better overall, but it’s pretty big at ~48” high x ~14.25” wide x ~33.75” deep assuming ¾” [19 mm] thick panels.

Ignoring any room boundary gain, at a glance it looks like it can handle ~1500 W before exceeding Xmax, so should be able to ‘rock your world’ a little.

Anyway, internal dimensions [unfolded] and approximate:

93” high
12.75” wide
15.75” deep
[2] 6” diameter vents x 5” long
driver down from top 29.5”
vents up from bottom 18.5”

The sim has very little damping, so can be smoothed out considerably more if it sounds too ‘loose’ in room. You may also want to experiment with different length vents.

GM
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File Type: gif Pioneer TS-W5102SPL 29.33 Hz MLTL - large.gif (6.8 KB, 19 views)
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Old 10th January 2013, 07:47 AM   #19
pulinsh is offline pulinsh  Latvia
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Originally Posted by GM View Post
OK, I increased the size of the one fold cab I simmed earlier to allow for this driver’s depth and the simmed response actually looks a bit better overall, but it’s pretty big at ~48” high x ~14.25” wide x ~33.75” deep assuming ¾” [19 mm] thick panels.

Ignoring any room boundary gain, at a glance it looks like it can handle ~1500 W before exceeding Xmax, so should be able to ‘rock your world’ a little.

Anyway, internal dimensions [unfolded] and approximate:

93” high
12.75” wide
15.75” deep
[2] 6” diameter vents x 5” long
driver down from top 29.5”
vents up from bottom 18.5”

The sim has very little damping, so can be smoothed out considerably more if it sounds too ‘loose’ in room. You may also want to experiment with different length vents.

GM
thanks you very much - but that is too big ... I can't fit that in my car
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Old 10th January 2013, 03:30 PM   #20
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Hmm, nowhere do I see where you said, or even implied, it was for a vehicle.

GM
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