I have acquired a pair of very large JBL speakers that I'm hoping to use
as playback monitors in my tracking room. They have a folded horn type
of design with a 15" woofer and a bullet tweeter. There is no model
number to be found anywhere. The finish is walnut veneer.

One speaker works fine, but the other has a problem in the crossover and
no signal is reaching the tweeter. I pulled the tweeter and checked it
by bypassing the crossover and it works fine. There is a box on the rear
with a crossover in it and a rotary pot for tweeter level adjustment.
Inside are two capacitors that I want to try replacing to see if that's
where the problem lies.

They are marked:
Chicago Condenser Corp. 10296 135766

There are two wire leads coming out of one end. There are no polarity
markings.

Anyone have an idea of the values of these?
--
--
John Noll
Retromedia Sound Studios
Red Bank, NJ 07701

Phone: 732-842-3853 Fax: 732-842-5631

http://www.retromedia.net

John Noll wrote:
One speaker works fine, but the other has a problem in the crossover and
no signal is reaching the tweeter. I pulled the tweeter and checked it
by bypassing the crossover and it works fine. There is a box on the rear
with a crossover in it and a rotary pot for tweeter level adjustment.
Inside are two capacitors that I want to try replacing to see if that's
where the problem lies.

Get the speaker that works fine and try measuring the caps. Knowing the
capacitor values will let you guess what the crossover frequency is, which
might help Harvey to identify the speakers. Just use the capacitance
setting on a cheap multimeter and see what they currently are at.
--scott


--
"C'est un Nagra. C'est suisse, et tres, tres precis."

John Noll wrote:
One speaker works fine, but the other has a problem in the crossover and
no signal is reaching the tweeter. I pulled the tweeter and checked it
by bypassing the crossover and it works fine. There is a box on the rear
with a crossover in it and a rotary pot for tweeter level adjustment.
Inside are two capacitors that I want to try replacing to see if that's
where the problem lies.

Get the speaker that works fine and try measuring the caps. Knowing the
capacitor values will let you guess what the crossover frequency is, which
might help Harvey to identify the speakers. Just use the capacitance
setting on a cheap multimeter and see what they currently are at.
--scott


--
"C'est un Nagra. C'est suisse, et tres, tres precis."

(Scott Dorsey) wrote:

John Noll wrote:
One speaker works fine, but the other has a problem in the crossover and
no signal is reaching the tweeter. I pulled the tweeter and checked it
by bypassing the crossover and it works fine. There is a box on the rear
with a crossover in it and a rotary pot for tweeter level adjustment.
Inside are two capacitors that I want to try replacing to see if that's
where the problem lies.

Get the speaker that works fine and try measuring the caps. Knowing the
capacitor values will let you guess what the crossover frequency is, which
might help Harvey to identify the speakers. Just use the capacitance
setting on a cheap multimeter and see what they currently are at.
--scott

The system is an 003 which consists of a D130, 075, and an N2400 crossover. The
crossover is a 2,400 Hz 12 db per octave crossover. I think it's at 16 ohms, but
it's been a while. If it's an upright cabinet (designed to fit in a corner),
it's a C34 (with a system installed, it becomes a D34003 - the 003 system are
the components listed above). If it's a low boy, it's a C40 with an 003 system
- a D40003).

Harvey Gerst
Indian Trail Recording Studio
http://www.ITRstudio.com/

(Scott Dorsey) wrote:

John Noll wrote:
One speaker works fine, but the other has a problem in the crossover and
no signal is reaching the tweeter. I pulled the tweeter and checked it
by bypassing the crossover and it works fine. There is a box on the rear
with a crossover in it and a rotary pot for tweeter level adjustment.
Inside are two capacitors that I want to try replacing to see if that's
where the problem lies.

Get the speaker that works fine and try measuring the caps. Knowing the
capacitor values will let you guess what the crossover frequency is, which
might help Harvey to identify the speakers. Just use the capacitance
setting on a cheap multimeter and see what they currently are at.
--scott

The system is an 003 which consists of a D130, 075, and an N2400 crossover. The
crossover is a 2,400 Hz 12 db per octave crossover. I think it's at 16 ohms, but
it's been a while. If it's an upright cabinet (designed to fit in a corner),
it's a C34 (with a system installed, it becomes a D34003 - the 003 system are
the components listed above). If it's a low boy, it's a C40 with an 003 system
- a D40003).

Harvey Gerst
Indian Trail Recording Studio
http://www.ITRstudio.com/

Harvey Gerst wrote:
(Scott Dorsey) wrote:


John Noll wrote:

One speaker works fine, but the other has a problem in the crossover and
no signal is reaching the tweeter. I pulled the tweeter and checked it
by bypassing the crossover and it works fine. There is a box on the rear
with a crossover in it and a rotary pot for tweeter level adjustment.
Inside are two capacitors that I want to try replacing to see if that's
where the problem lies.

Get the speaker that works fine and try measuring the caps. Knowing the
capacitor values will let you guess what the crossover frequency is, which
might help Harvey to identify the speakers. Just use the capacitance
setting on a cheap multimeter and see what they currently are at.
--scott


The system is an 003 which consists of a D130, 075, and an N2400 crossover. The
crossover is a 2,400 Hz 12 db per octave crossover. I think it's at 16 ohms, but
it's been a while. If it's an upright cabinet (designed to fit in a corner),
it's a C34 (with a system installed, it becomes a D34003 - the 003 system are
the components listed above). If it's a low boy, it's a C40 with an 003 system
- a D40003).

Harvey Gerst
Indian Trail Recording Studio
http://www.ITRstudio.com/

Thank you gentlemen. Sounds like it's a low-boy D40003.

--
--
John Noll
Retromedia Sound Studios
Red Bank, NJ 07701

Phone: 732-842-3853 Fax: 732-842-5631

http://www.retromedia.net

Harvey Gerst wrote:
(Scott Dorsey) wrote:


John Noll wrote:

One speaker works fine, but the other has a problem in the crossover and
no signal is reaching the tweeter. I pulled the tweeter and checked it
by bypassing the crossover and it works fine. There is a box on the rear
with a crossover in it and a rotary pot for tweeter level adjustment.
Inside are two capacitors that I want to try replacing to see if that's
where the problem lies.

Get the speaker that works fine and try measuring the caps. Knowing the
capacitor values will let you guess what the crossover frequency is, which
might help Harvey to identify the speakers. Just use the capacitance
setting on a cheap multimeter and see what they currently are at.
--scott


The system is an 003 which consists of a D130, 075, and an N2400 crossover. The
crossover is a 2,400 Hz 12 db per octave crossover. I think it's at 16 ohms, but
it's been a while. If it's an upright cabinet (designed to fit in a corner),
it's a C34 (with a system installed, it becomes a D34003 - the 003 system are
the components listed above). If it's a low boy, it's a C40 with an 003 system
- a D40003).

Harvey Gerst
Indian Trail Recording Studio
http://www.ITRstudio.com/

Thank you gentlemen. Sounds like it's a low-boy D40003.

--
--
John Noll
Retromedia Sound Studios
Red Bank, NJ 07701

Phone: 732-842-3853 Fax: 732-842-5631

http://www.retromedia.net