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SP12 [message #42430]

Thu, 11 September 2003 14:31

mism
Messages: 3
Registered: May 2009

Esquire

Would anyone have experience using a SP12 in a Pi enclosure, if so
what tweeter was used?
Regards
mism

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Re: SP12 [message #42432 is a reply to message #42430]

Thu, 11 September 2003 16:18

Wayne Parham
Messages: 18677
Registered: January 2001

Illuminati (33rd Degree)

Sorry, but I'm not familiar with the SP12. Could you post a link or give some information?

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Re: SP12 [message #42435 is a reply to message #42432]

Fri, 12 September 2003 04:26

mism
Messages: 3
Registered: May 2009

Esquire

Wayne thanks for your interest, this link is about all that I have for specs, http://www.geocities.com/michael_gesualdo/SP12_datasheet.html

http://www.geocities.com/michael_gesualdo/SP12_datasheet.html

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Re: SP12 [message #42444 is a reply to message #42435]

Fri, 12 September 2003 14:44

Wayne Parham
Messages: 18677
Registered: January 2001

Illuminati (33rd Degree)

We need the electro-mechanical parameters for the drivers to design a good loudspeaker with them. So you'll need to find a way to have them measured.

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Re: SP12 speaker data [message #42454 is a reply to message #42430]

Sat, 13 September 2003 05:14

mism
Messages: 3
Registered: May 2009

Esquire

I found this information, perhaps others would appreciate as well.
Many pages of speaker data on many speakers.
http://audionova.nu/docs/spkrdata.htm
regards
mism

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PiAlign'ed Electro-Voice SP12 [message #42455 is a reply to message #42454]

Sat, 13 September 2003 05:59

Wayne Parham
Messages: 18677
Registered: January 2001

Illuminati (33rd Degree)

I entered the values into PiAlign, using data from the table at your link.

Vad = Vas = 167.1L = 5.9ft3
Frd = Fs = 45Hz
Qd = 1/Qts = 1/0.67 = 1.5

PiAlign recommends a 4ft3 cabinet tuned to 25Hz using a 2" diameter port that's 1.5" long. Response is nice, with a gentle 2dB lift from 70hz to 200Hz and -3dB point of 50Hz. Usable response down to 35Hz, at -10dB.

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