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duaneage
08-30-2006, 10:27 PM
I tested a pair of 119HS-1 drivers used in the Control 10 system and here are the results

Driver 1
FS 36 Hz
Qes .5564
Qms 8.0575
Qts .52
Re 5.05 Ohms
Le 1.09mH
Vas 4.36Cu Ft
Reff 92.12 db 1w/1m
Bl 11.07
Cm 310 mm/N (mechanical compliance)
Mm 61.42 grams (mass of cone)
Sd .0532m2 (area of cone in square meters)


Driver 2

Driver 1
FS 38.7 Hz
Qes .60
Qms 9.001
Qts .56
Re 4.95 Ohms
Le .99 mH
Vas 4.48Cu Ft
Reff 92.32 db 1w/1m
Bl 10.5
Cm 290 mm/N (mechanical compliance)
Mm 58.0 grams (mass of cone)
Sd .0532m2 (area of cone in square meters)

I averaged the two sets of numbers together for importing into WinISD. I also looked up the Control 10 and determined that JBL went with approximately 2.5 Cuft tuned to about 40 Hz. This yields a peak of 3 db at 77 hz and a -6db cutoff at 35 Hz. We tested the driver in a 2.5 cu ft box and tuned the cabinet to around 42 hz (only tubes I had were 3 inches long, I needed 3.5") and found the peak at 79 Hz to be pronounced but not overbearing. Frequency response charts (http://www.jblpro.com/pub/obsolete/Control_10.pdf#search=%22control%2010%22) matched the predicted design and simple testing confirmed what was expected.

This is a quality driver that uses an accordian surround and a stiff spider. The magnet is not vented and smaller than other 12 inch drivers but is magnetically shielded, a plus for HT. Rather than use a huge magnet structure to dampen the driver, JBL chose mechanical means to control the cone. The Control 10 is rated at 300 watts "program material" which translates to a reliable 100 watts continuously. The driver is designed for rear mounting, there is no gasket on the rear of the basket flange.

Simulations ran with WinISD.
2.8 cu ft tuned to 35 Hz shown. 2.5 cu ft tuned to 40Hz was similar with better rolloff.

Zilch
08-30-2006, 11:42 PM
Cms = 0.3 mm/N, Sd = 0.0542 sq.m, BB6P calcs Bl = 11.01

JBL's not getting -6dB at 35 Hz, rather more like 60 Hz.

Close the port(s) (orchid) and see how it sounds with 2 Pi room response; good to 100 W:

glen
08-30-2006, 11:45 PM
Nice!
Thanks Duaneage!

duaneage
08-31-2006, 08:36 AM
Yeah, it's really a sealed box driver but in the tradition of the L100 they ported it and gave a boost to the bass. I am surprised how the frequency response curves match the L100.

The Control 10s are used in Disco/ nightclub environments so that design works.

Zilch
08-31-2006, 10:39 AM
Yeah, it's really a sealed box driver but in the tradition of the L100 they ported it and gave a boost to the bass. I am surprised how the frequency response curves match the L100.Those that build with them have an easy choice of bass voicing options, then.

Plumbers' test plugs in the ports or not will swap between the available "sounds" of those in 2.5 cuft boxes.... :thmbsup:

duaneage
08-31-2006, 11:09 AM
I think your avatar will soon be changed to a hand plugging ports on a vented box!