View Full Version : Two 4313B's are singing again...

11-25-2008, 11:16 AM
Just wanted to say thanks to all the members who helped and contributed to this great forum.

I was able to replace the woofer surrounds on my newly acquired 4313Bís that was gifted to me from a friend by following bobputmanís informative thread:

http://audioheritage.csdco.com/vbulletin/showthread.php?s=&threadid=469&highlight=NEW+SURROUNDS (http://audioheritage.csdco.com/vbulletin/showthread.php?s=&threadid=469&highlight=NEW+SURROUNDS)

I replaced from EBay one LE5-9 midrange due to a tear in the cone. Interesting how EBay seems to have what youíre looking for when you need it.

Changed out the old crossover caps w/ Solens and added the .01uF bypass from techbots article and got the correct crossover schematic from fangio.

http://www.audioheritage.org/vbulletin/showthread.php?t=3555 (http://www.audioheritage.org/vbulletin/showthread.php?t=3555)

http://audioheritage.csdco.com/vbulletin/showpost.php?p=226135&postcount=2 (http://audioheritage.csdco.com/vbulletin/showpost.php?p=226135&postcount=2)

The grill cloth was hanging from the frame so I removed it, washed it gently and re-stretched it following saemanís excellent post using contact cement and an iron.

http://audioheritage.org/vbulletin/showpost.php?p=77044&postcount=1 (http://audioheritage.org/vbulletin/showpost.php?p=77044&postcount=1)

The brushed aluminum on all the speaker fronts were tarnished so some light sanding with emery and Flitz cleaner with a felt pad on a Dremel did the trick.

Sanded the cabinets and used natural clear Watco oil finish for the veneer.

Finally Iím going to make some stands following this diy link:

http://www.audiotweaks.com/diy2/robs_stands/page01.htm (http://www.audiotweaks.com/diy2/robs_stands/page01.htm)

The 4313Bís sound fantastic! I am extremely happy that I did this project, lately I have been playing some of my favorite CDís through a NAD 3140 amplifier. I am hearing nuances and information that I did not know existed, the attack of bass is especially noteworthy. A recurring thought keeps running through my mind as I smile/listen saying - this is how recorded music should be heard.

So once again to all who contributed, shared and posted Ė

Thank youÖ


11-25-2008, 11:20 AM
Great restoration!

Regards, Ron

Fred Sanford
11-25-2008, 11:42 AM
Excellent results - enjoy them.

Cute pooch, too.


11-26-2008, 08:05 AM
Agree! Great, meticulously careful job on a great cabinet! Great choice - worthy of all that work.

I imagine your surprise at their incredible sound. I personally think that 10-in woofer far superior to most all of JBL's 12-in offerings...

11-29-2008, 04:30 PM
Nice job. I just finished restoring a pair of 4313's. Amazing what a little thought and TLC can bring out.:)

Agreed on the 10" woofers from this age, a lot more control and less boom than other 12" woofers from this era.

I also owe a tip of the hat to all the members that have posted about these Monitors and restoration techniques, here, at LHF. Invaluable knowledge that I hope I can pass on to other JBL users.