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Old 26th November 2007, 01:14 AM   #1
GM is offline GM  United States
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Default PE 269-570 bookshelf speaker

http://fullrangedriver.com/forum/viewtopic.php?id=1959

Quote:
Hello,

I have a friend who bought some of these buyout drivers from PartsExpress (T/S parameters and datasheets in link):

http://www.partsexpress.com/pe/pshow...TOKEN=61379318

He needs bookshelf type monitors for his small bedroom system. 1 driver for each enclosure. Tweeters would be added to extend HF.

I was thinking Sealed or Aperiodic since the drivers are high Q... Any suggestions/dims are welcome. Thank you very much.


fred
Greets!

Since no shelf specs given and assuming it will be against a wall, I chose a low tuned MLTL to try and match up to its mids 'hump':

L = 21.71"
zdriver = 8.58"
zport = 18.2"
CSA = 38.767"^2
dport = 1.187"
Lport = 0.75"

All dims i.d. and approximate. Enlarge vent for more mid-bass/higher Fb. Stuff to suit, 0.3 lbs/ft^3 of polyfil shown:

GM
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Old 26th November 2007, 08:02 AM   #2
fred76 is offline fred76  Philippines
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Hi GM,

A cute mltl . Thank you.

p.s. - I might finish an iBIBk build before Christmas...

regards,
fred
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Old 26th November 2007, 08:34 AM   #3
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Neat.
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Old 26th November 2007, 02:25 PM   #4
GM is offline GM  United States
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Thanks! If you build, please post stuffing, vent size, etc. used, performance opinions.
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Old 14th October 2008, 08:50 AM   #5
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Quote:
L = 21.71" zdriver = 8.58" zport = 18.2" CSA = 38.767"^2 dport = 1.187" Lport = 0.75"
how would this look like? im new to speaker building.

how can i design a baffle that would definitely give bigger sound from this small driver without compromise.

thank you very much.
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Old 16th October 2008, 03:16 AM   #6
GM is offline GM  United States
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I don't do drawings, but it looks like this one except the dims are different: http://www.quarter-wave.com/Project0..._Enclosure.pdf

H = 21.71"
W = 7.38"
D = 5.25"
driver down 8.58"
vent cutout up 3.5"

The vent is a 1.1875" diameter hole in a 0.75" thick baffle.

Not sure what you mean about the baffle design, but the bigger it is the better it will perform down low, so you can make the baffle as big as you have room for.

GM
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Old 18th October 2008, 01:39 AM   #7
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thanks for your reply. though this thread is kinda old.
i'll do it.
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Old 18th October 2008, 02:31 AM   #8
GM is offline GM  United States
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You're welcome! Please let us know how it performs and any changes and/or fine tuning you do.

GM
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