PE 269-570 bookshelf speaker

GM · 26th November 2007, 01:14 AM

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

fred76 · 26th November 2007, 08:02 AM

Hi GM,

A cute mltl

. Thank you.

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

regards,
fred

Scottmoose · 26th November 2007, 08:34 AM

Neat.

GM · 26th November 2007, 02:25 PM

Thanks! If you build, please post stuffing, vent size, etc. used, performance opinions.

jondavis · 14th October 2008, 08:50 AM

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.

GM · 16th October 2008, 03:16 AM

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

jondavis · 18th October 2008, 01:39 AM

thanks for your reply. though this thread is kinda old.
i'll do it.

GM · 18th October 2008, 02:31 AM

You're welcome! Please let us know how it performs and any changes and/or fine tuning you do.

GM

26th November 2007, 02:25 PM	#4
GM diyAudio Member Join Date: Jun 2003 Location: Chamblee, Ga.	Thanks! If you build, please post stuffing, vent size, etc. used, performance opinions. __________________ Loud is Beautiful if it's Clean! As always though, the usual disclaimers apply to this post's contents.

16th October 2008, 03:16 AM	#6
GM diyAudio Member Join Date: Jun 2003 Location: Chamblee, Ga.	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 __________________ Loud is Beautiful if it's Clean! As always though, the usual disclaimers apply to this post's contents.

18th October 2008, 02:31 AM	#8
GM diyAudio Member Join Date: Jun 2003 Location: Chamblee, Ga.	You're welcome! Please let us know how it performs and any changes and/or fine tuning you do. GM __________________ Loud is Beautiful if it's Clean! As always though, the usual disclaimers apply to this post's contents.

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26th November 2007, 08:02 AM	#2
fred76 diyAudio Member Join Date: Jan 2005 Location: Manila	Hi GM, A cute mltl . Thank you. p.s. - I might finish an iBIBk build before Christmas... regards, fred

26th November 2007, 08:34 AM	#3
Scottmoose diyAudio Member Join Date: Mar 2005 Location: UK	Neat.

18th October 2008, 01:39 AM	#7
jondavis diyAudio Member Join Date: Nov 2004 Location: Manila	thanks for your reply. though this thread is kinda old. i'll do it.

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