Ultimate cheapskate OB midrange??

Moondog55 · 30th November 2011, 02:26 AM

Another Op-Shop find
I know they are not "Good" but they work and they were cheap.
Was $5- too much?
Add the small sealed box I paid $1- for an 8inch woofer and a couple of second hand components and these may do for small gatherings.
Realistic #2011Aa
I have seen small tweeters with bigger magnets, 8 inch paper cone pleated paper surround and complete with "L-pad"

Pano · 30th November 2011, 03:28 AM

Don't know that driver, got more info?

Moondog55 · 30th November 2011, 03:41 AM

have been able to find out nothing, except that thousands were sold; perhaps 10's of thousands even. Found a google link to some selling in the Phillipines for $USD 55- a pair but that is way too much.
Last month I found a pair of "Broken" speakers on the footpath, hashed up old repair job and blown tweeters of course.
BUT
8inch Dai-1chi woofer ( SP8-30 ) which has reasonable "Doof-Doof" capability, 30 litre box and the same width as the midrange enclosure
SO
Budget project is now in the pipeline , I have a couple of ferrite cored 5.8mH coils in the spares box. First on the woofer and second LR ( electrical of course ) on the little one??
Somewhere around 400 should offer reasonable protection for the mid where to put the first order XO on the woofer??

Moondog55 · 04:53 AM

8" WOOFER 30W
At least I have the basic parameters for the woofer
Paper Cone.
Foam Surround.
Z 8 (7.0dc)
Freq. 406KHz (±6dB)
Fo 44Hz
Sens’ 90dB ( this of course includes the huge peak at the top end )
Magnet 8 Oz
Voice 25mm
Power 30W nom.
Qms 2.20
Qes 0.80
Qts 0.59
Vas 61.23L
Zo 26.6
Sd 0.022M²
SP8-30

Moondog55 · 30th November 2011, 05:09 AM

OK so sealed I'll get an Fc of around 70hz, I'll let every-one know how they sound in a week

30th November 2011, 02:26 AM	#1
Moondog55 diyAudio Member Join Date: Jun 2007 Location: Norlane; Geelong: Victoria: Australia	Ultimate cheapskate OB midrange?? Another Op-Shop find I know they are not "Good" but they work and they were cheap. Was $5- too much? Add the small sealed box I paid $1- for an 8inch woofer and a couple of second hand components and these may do for small gatherings. Realistic #2011Aa I have seen small tweeters with bigger magnets, 8 inch paper cone pleated paper surround and complete with "L-pad" __________________ QUOTE" The more I know, the more I know, I know (insert maniacal laugh >here<) NOTHING"

30th November 2011, 03:41 AM	#3
Moondog55 diyAudio Member Join Date: Jun 2007 Location: Norlane; Geelong: Victoria: Australia	have been able to find out nothing, except that thousands were sold; perhaps 10's of thousands even. Found a google link to some selling in the Phillipines for $USD 55- a pair but that is way too much. Last month I found a pair of "Broken" speakers on the footpath, hashed up old repair job and blown tweeters of course. BUT 8inch Dai-1chi woofer ( SP8-30 ) which has reasonable "Doof-Doof" capability, 30 litre box and the same width as the midrange enclosure SO Budget project is now in the pipeline , I have a couple of ferrite cored 5.8mH coils in the spares box. First on the woofer and second LR ( electrical of course ) on the little one?? Somewhere around 400 should offer reasonable protection for the mid where to put the first order XO on the woofer?? __________________ QUOTE" The more I know, the more I know, I know (insert maniacal laugh >here<) NOTHING"

30th November 2011, 04:51 AM	#4
Moondog55 diyAudio Member Join Date: Jun 2007 Location: Norlane; Geelong: Victoria: Australia	8" WOOFER 30W At least I have the basic parameters for the woofer Paper Cone. Foam Surround. Z 8 (7.0dc) Freq. 406KHz (±6dB) Fo 44Hz Sens’ 90dB ( this of course includes the huge peak at the top end ) Magnet 8 Oz Voice 25mm Power 30W nom. Qms 2.20 Qes 0.80 Qts 0.59 Vas 61.23L Zo 26.6 Sd 0.022M² SP8-30 __________________ QUOTE" The more I know, the more I know, I know (insert maniacal laugh >here<) NOTHING" Last edited by Moondog55; 30th November 2011 at 04:53 AM. Reason: Add comment

30th November 2011, 05:09 AM	#5
Moondog55 diyAudio Member Join Date: Jun 2007 Location: Norlane; Geelong: Victoria: Australia	OK so sealed I'll get an Fc of around 70hz, I'll let every-one know how they sound in a week __________________ QUOTE" The more I know, the more I know, I know (insert maniacal laugh >here<) NOTHING"

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30th November 2011, 03:28 AM	#2
Pano diyAudio Moderator Join Date: Oct 2004 Location: North Carolina Blog Entries: 4	Don't know that driver, got more info?

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