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Tweeter questions [message #35776] Wed, 03 April 2002 12:05 Go to next message
JohnR is currently offline  JohnR
Messages: 4
Registered: May 2009
Esquire
Hi folks, I have downloaded Wayne's giant :-) crossover document and will attempt to digest it over the next couple weeks. In the meantime, I have a couple questions..

- Is it OK to just mount the tweeter on the top of the box instead of in the baffle? Will the crossover need to be adjusted because of this?

- Where is a good place to buy the HF drivers? I'm just trying to get an idea of pricing. Many Pi models use the PSD2002 and H290 horn? I see the PSD2002 at Adire for $89 but no H290.

Thanks!

JohnR

Re: Tweeter questions [message #35777 is a reply to message #35776] Wed, 03 April 2002 12:43 Go to previous messageGo to next message
Sam P. is currently offline  Sam P.
Messages: 307
Registered: May 2009
Grand Master
PE had the PSD2002's for $61.01 last Feb. Check their web site, they give you the price via email almost in real time usually.
Try to minimize the separation between the drivers by mounting the woofer high on the front baffle. Sam
Externally mounted horn tweeters [message #35778 is a reply to message #35776] Wed, 03 April 2002 14:43 Go to previous messageGo to next message
Wayne Parham is currently offline  Wayne Parham
Messages: 18683
Registered: January 2001
Illuminati (33rd Degree)

Check out the Duemm/Martinelli implementation of the four π Speaker design. It was very popular in Lima.


Premium Stage Series four π with external wood horn

The crossover used was the standard two-way π crossover 1K6a012dB shown in the schematic, with no modifications.

Thanks Wayne, another quick question or two... :-) [message #35789 is a reply to message #35778] Wed, 03 April 2002 17:48 Go to previous messageGo to next message
JohnR is currently offline  JohnR
Messages: 4
Registered: May 2009
Esquire
Is the difference in the sensitivity due to the H290 horn? Also, is it possible to compute the mechanical reactance circuit values of a woofer from the T/S specs?

Thanks also to Sam P, PSD2002 and H290 are 61.01 and 29.11 from PE :-)

JohnR

Re: Thanks Wayne, another quick question or two... :-) [message #35790 is a reply to message #35789] Wed, 03 April 2002 18:19 Go to previous messageGo to next message
dbeardsl is currently offline  dbeardsl
Messages: 127
Registered: May 2009
Master

Wayne answered that same question a bit ago, check out the message.

Also, Call Image Communications at 1-800-552-1639. PSD2002 and H290 are 47.31 and 23.50

Danny

Re: Thanks Wayne, another quick question or two... :-) [message #35793 is a reply to message #35789] Wed, 03 April 2002 20:33 Go to previous messageGo to next message
Wayne Parham is currently offline  Wayne Parham
Messages: 18683
Registered: January 2001
Illuminati (33rd Degree)

Yes, the tweeter is more efficienct because it's horn loaded. As for determination of virtual circuit values for the mechanical resonance, you'll have to back-solve for those. Measure the impedance curve and determine the LRC values that would create that reactance.

Re: Thanks Wayne, another quick question or two... :-) [message #35818 is a reply to message #35789] Fri, 05 April 2002 09:23 Go to previous message
Adam is currently offline  Adam
Messages: 419
Registered: May 2009
Illuminati (1st Degree)
The PSD2002/H290 is 10-12 db louder than the Delta 15.

Adam

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