Cheap little Sony Drivers

Smokehouse Bob · 28th January 2007, 12:15 AM

Anyone seen or tried these? Small magnet, rated at 8 ohm, 2W. Accordian surround.

Geoff H · 28th January 2007, 04:49 AM

That tweeter looks very similar to a Panasonic 5PH34SB. 52mm o/d.
Quite nice up top, and efficient.

Geoff.

Smokehouse Bob · 29th January 2007, 02:26 AM

Yeah, they damn near match the ones taken from the "Tunnel Reflex" boxes that formerly held the FE103A's.

planet10 · 29th January 2007, 05:48 AM

what is the number on those?

I've run thru quite a few similar alnico, but i don't have anything turning up with ceramic magnets.

dave

Geoff H · 29th January 2007, 11:24 AM

Hi Dave, I have seen your reports on the little drivers. A handy reference. The 6" Panos are EAS-16P24EM. 8 ohm 20 w peak, ex speaker model SB-185. The cabinet makes a nice shelf. Recycle the black grill cloth.

I have measured Fo at 70 Hz, Zo of 22 ohm, Res 7.6 ohm. Deep curvilinear cone. Sound quite nice and airy with the back of the 19 litre or so cab off.

Those Sony's look like they are from a mid 70s portable cassette player. Perhaps the original ghetto blaster.

Regards,
Geoff

Smokehouse Bob · 29th January 2007, 12:54 PM

Quote:

Originally posted by Geoff H
Those Sony's look like they are from a mid 70s portable cassette player. Perhaps the original ghetto blaster.

Regards,
Geoff

Close, Geoff. They were 2 small boxes from a Sony "all in one" system. Two little bookshelfish sized speaker boxes, no more/no less. Had the obligatory matrix of holes and black mesh on the back board. That's what caught my eye initially. The boxes made their way to the dumpster, but they yielded about 4 feet of fine quality wool felt for dampening the FE103a's. The puzzle trick might work these into something worthy of nice boxes. As you indicated, the little paper tweets sound fairly efficient. I passed on another pair of RS Minimus, I could see "full range" through the holes in the back board. The ceramic was microscopic and I didn't think them good candidates for a ride home.

Geoff H · 29th January 2007, 10:59 PM

Dear Dr Bob.
You must be learning. You are getting fussy on what to take home.
I take my chances on anything. If they're no good, I save the magnets for an experimental ribbon idea.

I am guessing the Sony's have an AlNiCo magnet with a U piece about 1 3/4" wide. How about a pic from behind?

Geoff.

planet10 · 30th January 2007, 12:05 AM

Quote:

Originally posted by Smokehouse Bob
the little paper tweets sound fairly efficient.

Pop the dust cap off the tweeter and a trimmed (shortened) foam ear plug does a good job as a phase plug. A 2-3.3 uF cap and away you go....

dave

Smokehouse Bob · 30th January 2007, 12:29 AM

Sadly, no alnico Geoff. Here's a bit o' piccage. Thanks for the earplug tip Dave.

planet10 · 30th January 2007, 02:18 AM

yours are 366s, i only have 4 412s... very similar looking thou. I'd guess National (Panasonic/Technics/Matsushita) OEM.

dave

29th January 2007, 05:48 AM	#4
planet10 diyAudio Moderator Join Date: Oct 2001 Location: Victoria, BC, NA, Sol III Blog Entries: 4	what is the number on those? I've run thru quite a few similar alnico, but i don't have anything turning up with ceramic magnets. dave __________________ community sites t-linespeakers.org, frugal-horn.com ........ commercial site planet10-HiFi p10-hifi forum here at diyA

30th January 2007, 02:18 AM	#10
planet10 diyAudio Moderator Join Date: Oct 2001 Location: Victoria, BC, NA, Sol III Blog Entries: 4	yours are 366s, i only have 4 412s... very similar looking thou. I'd guess National (Panasonic/Technics/Matsushita) OEM. dave __________________ community sites t-linespeakers.org, frugal-horn.com ........ commercial site planet10-HiFi p10-hifi forum here at diyA

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29th January 2007, 02:26 AM	#3
Smokehouse Bob diyAudio Member Join Date: Nov 2004 Location: Woodstock, GA	Yeah, they damn near match the ones taken from the "Tunnel Reflex" boxes that formerly held the FE103A's.

29th January 2007, 11:24 AM	#5
Geoff H diyAudio Member Join Date: Oct 2006	Hi Dave, I have seen your reports on the little drivers. A handy reference. The 6" Panos are EAS-16P24EM. 8 ohm 20 w peak, ex speaker model SB-185. The cabinet makes a nice shelf. Recycle the black grill cloth. I have measured Fo at 70 Hz, Zo of 22 ohm, Res 7.6 ohm. Deep curvilinear cone. Sound quite nice and airy with the back of the 19 litre or so cab off. Those Sony's look like they are from a mid 70s portable cassette player. Perhaps the original ghetto blaster. Regards, Geoff

29th January 2007, 10:59 PM	#7
Geoff H diyAudio Member Join Date: Oct 2006	Dear Dr Bob. You must be learning. You are getting fussy on what to take home. I take my chances on anything. If they're no good, I save the magnets for an experimental ribbon idea. I am guessing the Sony's have an AlNiCo magnet with a U piece about 1 3/4" wide. How about a pic from behind? Geoff.

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