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JORDAN JX92S FULLRANGE SPEAKER

The Jordan JX92S is a 5" metal cone fullrange driver which is listed by the manufacturer as having an Xmax of 9 mm. The JX92S is constructed on an aluminum die-cast frame. The metallic cone is listed as a 92 mm Controflex metal foil cone and the dust cap is made of the same material. The pole piece is vented and the magnet is shielded. This is a very attractive driver that appears to be well built. The Jordan drivers are unique amongst most of the smaller fullrange and extended drivers in that they cover almost nine octaves. Unlike the lower cost and DIY friendly Fostex drivers, the JX92S does not come with a gasket or mounting screws.

Jordan JX92S Fullrange Speaker
Jordan JX92S Full Range Driver

Jordan JX92S T/S Measurements

I have measured the Thiele/Small Parameters of the Jordan JX92S drivers using the Dayton Audio Woofer Tester 3 (WT3). The parameters I measured do not match very closely with those published by the manufacturer. The table below shows a comparison of the measured results. The measurements below are the average of two drivers which were very closely matched.

Parameter Manufacturer WT31 Sound Easy2 WT33
Fs 45.0 Hz 51.8 Hz 53.1 Hz 51.1 Hz
Vas 15.28 L 11.38 L 11.01 L 11.81 L
Qts 0.40 0.56 0.58 0.58
Qes 0.58 0.77 0.78 0.80
Qms 1.35 2.12 2.19 2.11
Re 6.0 Ohms 5.2 Ohms 5.2 Ohms 5.2 Ohms
Le -- 0.17 mH -- 0.16 mH
SPL 88 dB 85.2 dB 83.8 dB 84.9 dB

T/S Parameters - Jordan JX92S Driver

Notes:
  1 - measurements by diyAudioProjects.com using Dayton Audio Woofer Tester 3
  2 - measurements by Zaph|Audio using SoundEasy
  3 - measurements by Zaph|Audio using Woofer Tester 3

It is our understanding that E.J. Jordan has been made aware of these new measurements. We have been promised an update soon. They have already indicated that there was a typo in their datasheet and have changed Re from 4.5 to 6 ohms.

Given measured Qts (~0.58), a relatively large vented enclosure will be required in order to get bass depth from this driver. At the expense of LF response, the enclosure size can be minimized by using an aperiodic speaker enclosure. A sealed enclosure should also work well.

Resources

DIY Jordan JX92S Projects Links