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View Full Version : Help to identify JBL 2" driver



hugemc
02-11-2012, 10:26 AM
Hi Folks,

I picked up a pair of drivers this morning thinking they were JBL. However upon further inspection I'm not so sure. Unfortunately the backplates were missing and what you see in the pictures is what I got.

Any help to identify what they are would be much appreciated.

John

edgewound
02-11-2012, 02:58 PM
375....Looks like it, anyway.

Maron Horonzakz
02-12-2012, 08:45 AM
LOOKS LIKE THE FRONT HALF OF A 375 SHOWING THE PHASE PLUG,,,,minus the voicecoil and diaphram and back casing..

hugemc
02-12-2012, 09:32 AM
Many thanks Maron and Edgewound. I also thought they looked like 375s when I was purchasing them

Having spent the last 4 or so hours scanning the internet I think I may have figured out what they are. The look distinctly like Gauss 4000 or 4061 depending on who you listen to.

The following picture is from Speakerplan forum, actually posted by "jbl_man" and here's a link with some information.

http://forum.speakerplans.com/pair-gauss-hf4000-2-exit-for-sale_topic9088.html

Cheers

John

Mike F
02-13-2012, 07:35 PM
The Gauss HF 4000 had 4.125" voicecoils FWIW

grumpy
02-14-2012, 10:23 AM
This looks more like what I remember re 375 drivers (not having one in my hand to look at):

http://www.audioheritage.org/vbulletin/showthread.php?346-375-questions

hugemc
02-14-2012, 11:36 AM
Mike,

Thanks for that! From what I've come across so far the 4000 and 4061 have different dias, so next step is to determine precisely what I have. Then I will get some dias, which I believe are hard to come across nowadays. Plus I need to source some backplates as well

Grumpy,

I knew they were not 375 when I compared them to 2440 and 2441 I have in the front room.

Thankfully the drivers were pretty cheap and included in the deal were 2 x 2310s in reasonable salvageable condition.

John

grumpy
02-14-2012, 03:13 PM
Sure, I was just adding that for completeness sake, should someone else run across this thread years from now.

edgewound
02-15-2012, 08:47 AM
Many thanks Maron and Edgewound. I also thought they looked like 375s when I was purchasing them

Having spent the last 4 or so hours scanning the internet I think I may have figured out what they are. The look distinctly like Gauss 4000 or 4061 depending on who you listen to.

The following picture is from Speakerplan forum, actually posted by "jbl_man" and here's a link with some information.

http://forum.speakerplans.com/pair-gauss-hf4000-2-exit-for-sale_topic9088.html

Cheers

John

Good detective work. I should've recognized that beast. I haven't seen one in my shop for close to twenty years. I've got one NOS diaphragm on hand...not sure if it's 8 or 16 ohms.

tomt
02-15-2012, 12:46 PM
bottom of the first chart -


http://www.greatplainsaudio.com/parts.html (http://www.greatplainsaudio.com/parts.html)