AudioRoundTable.com: Pi Speakers

Home » Sponsored » Pi Speakers » Piezo Curves

Show: Today's Messages :: Navigator :: Polls
E-mail to friend

Piezo Curves [message #33514]

Fri, 06 July 2001 21:13

Andy G
Messages: 68
Registered: May 2009

Viscount

The link below gives some scans of the piezo curves published in the Jaycar cattle dog.

Hope they are useful!

Piezo curves

Report message to a moderator

Re: Piezo Curves [message #33515 is a reply to message #33514]

Sat, 07 July 2001 00:18

Wayne Parham
Messages: 18787
Registered: January 2001

Illuminati (33rd Degree)

Thanks for posting those response curves! I think I can speak for everyone when I say that we appreciate the time you spent scanning the images and putting them online. Paul C. loves those large format piezo compression drivers.

Report message to a moderator

Might be a good idea to save them to your computers. !! [message #33516 is a reply to message #33515]

Sat, 07 July 2001 03:41

Andy G
Messages: 68
Registered: May 2009

Viscount

Glad they are useful. :-))

Report message to a moderator

Thanks,Andy! [message #33517 is a reply to message #33516]

Sat, 07 July 2001 16:11

Paul C.
Messages: 218
Registered: May 2009

Master

Thanks, Andy! Looks like Wayne was right, with the 1188 the woofer should be rolled off at 600 hz rather than 800 hz.

The KSN1188a looks very good, in fact, better than many more expensive units. This jives with what my ears tell me.

Report message to a moderator

Wayne, what's the scale on KSN1038? [message #33523 is a reply to message #33517]

Mon, 09 July 2001 15:27

AudioLapDance
Messages: 40
Registered: May 2009

Baron

Hey Wayne,

I'm trying to compare these piezos to the KSN1038 but I'm going blind trying to read the scale on the freq response graph--I swear that's why I'm going blind, it's not because of the "other thing" ;-)

There seems to be 5 minor divisions per major division.
In between 4k and 5k Hz, the response rises one minor div, is that ~3db?
There's a trough after 10k to about 15k Hz, is that ~3dB?

Thanks,
Jeff

Report message to a moderator

Re: Wayne, what's the scale on KSN1038? [message #33525 is a reply to message #33523]

Tue, 10 July 2001 01:44

Wayne Parham
Messages: 18787
Registered: January 2001

Illuminati (33rd Degree)

The frequency response chart for the KSN-1038 is broken into a grid showing 5dB increments with bold lines, and 1dB increments with fine lines, in between. It shows output averaging 105dB with 4v RMS input, measured at a distance of 18". To translate this to 2.83v/M, subtract 9dB. The ripple shown is only about 3dB.

http://www.pispeakers.com/KSN1041_hires_graph.gif

Report message to a moderator

Request of Andy G? [message #33533 is a reply to message #33525]

Wed, 11 July 2001 01:09

AudioLapDance
Messages: 40
Registered: May 2009

Baron

Hey Andy, thanks again for those response graphs!

Would you be able to post the responses for the KSN1038/1041 and the KSN1005?

It would be great to compare them to Wayne's old spec sheet.
Your efforts are appreciated muchly!

Best regards,
Jeff

Report message to a moderator

Re: Request of Andy G? [message #33534 is a reply to message #33533]

Wed, 11 July 2001 02:27

Andy G
Messages: 68
Registered: May 2009

Viscount

G'day Jeff, sorry for the delay. Jaycar doesn't sell the 1038 (so I can't help you there), but I'll scan the 1005A curves and add to the page asap.

I'll also link the scans from my main pages.

Report message to a moderator

Done! nt [message #33535 is a reply to message #33534]

Wed, 11 July 2001 02:40

Andy G
Messages: 68
Registered: May 2009

Viscount

Report message to a moderator

Hey Andy, are there any others that look flat? [message #33539 is a reply to message #33535]

Wed, 11 July 2001 19:57

AudioLapDance
Messages: 40
Registered: May 2009

Baron

... and I don't mean the young ladies at the beach! :-0

If you wouldn't mind letting your fingers take a walk through the catalog; do any of the other piezos look flat?
I was wondering about the KSN1177 or KSN1167?
And if you have the time: KSN1133, KSN1148, KSN1130, any others ...

Thanks a bunch,
Jeff

Report message to a moderator