414-8a alnico 8 ohm T/S ?

vega65 · 19th November 2011, 01:30 PM

Have searched without success. Need the specs for calculation of a small onken enclosure.

Inductor · 05:46 PM

Altec 414A/416A/515B/406B Loudspeaker Spec Sheet
http://www.greatplainsaudio.com/vint...F_Speakers.pdf

Thiele/Small Parameters For Most Altec Speakers
http://www.greatplainsaudio.com/altec_thiele_small.html

Onken Calculator
Onken Calculator

vega65 · 19th November 2011, 05:45 PM

Thanks
I know these, in the T/S list 414 a is missing

Inductor · 19th November 2011, 06:09 PM

Quote:

Originally Posted by vega65

Thanks
I know these, in the T/S list 414 a is missing

You can measure.

GM · 19th November 2011, 11:44 PM

Quote:

Originally Posted by vega65

Have searched without success. Need the specs for calculation of a small onken enclosure.

Originally, ~30 Hz Fs/0.3 Qts/14 ft^3 Vas, but I've seen re-cones with much different specs, so you really need to measure yours if planning to build such an elaborate, fixed port cab.

GM

vega65 · 20th November 2011, 08:34 AM

Thanks GM.
resulting in an enclosure of ca 200 liter , before rising Qts due to higher zout from amp.

vega65 · 09:11 AM

Sorry ....
Asuming alignment5,7 above.looking for a driver to fit in a smaller enclosure.ca 100l or less should be fine.
By the way GPA makes 414-8a alnico , specs promised pr Mail. The above indicates the 414 is candidate for future project.

GM · 20th November 2011, 02:19 PM

You're welcome!

Based on some others GPA 15" re-cones, it wouldn't surprise me if they only use the later 'B'/'Z' series which has a much lower Vas [~125-160 L of mine and others OEM units] to fit two in the 9844 studio monitors, so no problem fitting them in 100 L tuned to around/at Fs.

Anyway, please post GPA's specs.

GM

Inductor · 03:07 PM

You can find nice pics on the theme in some Portuguese forums (no translation) here
Sistema ONKEN (Escuta)
and some Onken made in Portugal by a russian friend named Oleg Lesnikov (12" and 15").
AudioShow 2008
hi-fi.pt
Lesnikov Acoustics
Lesnikov Acoustics pic

pieter t · 20th November 2011, 03:06 PM

Publishing T/S parameters is common practice.
It would be clever when GPA would do it also; seems to me a requirement in order to be taken 100% serious by the loudspeaker community.

19th November 2011, 01:30 PM	#1
vega65 diyAudio Member Join Date: Nov 2007	414-8a alnico 8 ohm T/S ? Have searched without success. Need the specs for calculation of a small onken enclosure.

19th November 2011, 05:39 PM	#2
Inductor diyAudio Member Join Date: Feb 2006 Location: Cascais	Altec 414A/416A/515B/406B Loudspeaker Spec Sheet http://www.greatplainsaudio.com/vint...F_Speakers.pdf Thiele/Small Parameters For Most Altec Speakers http://www.greatplainsaudio.com/altec_thiele_small.html Onken Calculator Onken Calculator __________________ What the Hell is this crap?! It's not crap, it's muzak. Last edited by Inductor; 19th November 2011 at 05:46 PM. Reason: Onken Calculator

20th November 2011, 08:49 AM	#7
vega65 diyAudio Member Join Date: Nov 2007	Sorry .... Asuming alignment5,7 above.looking for a driver to fit in a smaller enclosure.ca 100l or less should be fine. By the way GPA makes 414-8a alnico , specs promised pr Mail. The above indicates the 414 is candidate for future project. Last edited by vega65; 20th November 2011 at 09:11 AM.

20th November 2011, 02:19 PM	#8
GM diyAudio Member Join Date: Jun 2003 Location: Chamblee, Ga.	You're welcome! Based on some others GPA 15" re-cones, it wouldn't surprise me if they only use the later 'B'/'Z' series which has a much lower Vas [~125-160 L of mine and others OEM units] to fit two in the 9844 studio monitors, so no problem fitting them in 100 L tuned to around/at Fs. Anyway, please post GPA's specs. GM __________________ Loud is Beautiful if it's Clean! As always though, the usual disclaimers apply to this post's contents.

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19th November 2011, 05:45 PM	#3
vega65 diyAudio Member Join Date: Nov 2007	Thanks I know these, in the T/S list 414 a is missing

20th November 2011, 08:34 AM	#6
vega65 diyAudio Member Join Date: Nov 2007	Thanks GM. resulting in an enclosure of ca 200 liter , before rising Qts due to higher zout from amp.

20th November 2011, 03:06 PM	#10
pieter t diyAudio Member Join Date: Apr 2009	Publishing T/S parameters is common practice. It would be clever when GPA would do it also; seems to me a requirement in order to be taken 100% serious by the loudspeaker community.

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