Jordan EIKONA drive unit
The new Jordan EIKONA wideband drive unit is now being produced in limited quantities.
This is the long-awaited replacement for the JX92S. Building on the strengths of that classic drive unit, the EIKONA sounds very clear and detailed. It will go lower in the bass than the JX92S and sounds smoother and more natural at high frequencies. Major technical parameters are close to the original JX92S, enabling them to be used with the same or very similar cabinet alignments.
In a suitable enclosure, the EIKONA is capable of covering the full musical spectrum, from 35Hz to 20kHz. Due to its inherent flexibility, it will also work well in enclosures as small as 3 litres. A straightforward, sealed enclosure of 6 litres would give a very high-quality satellite system for stereo or multi-channel use.
We have updated the Jordan VTL design to accommodate theEIKONA. This enclosure enables the drive unit to reach 30Hz. See right to download the revised PDF.
Technical specifications are shown below.
Please note that these specifications are from production units and are a combination of direct measurement and computer measurement (For more details of our reservations about computer measurement, please refer to our article The Parameter Game and the Jordan Manual Chapter 6 both of which can be found on the ARTICLES page.
The chassis size of the new drive unit is given below:
| A | diameter across diagonals | 150 mm |
| B | baffle cut out diameter | 122 mm |
| C | PCD fixing holes | 138 mm |
| D | width & radius of curved sides | 132 mm |
| overall depth of unit | 67 mm |
Thiele-Small parameters
Chapter 6| Dia | 100 | mm effective diameter |
| Qts | 0.355 | total Q |
| Qes | 0.597 | electrical Q |
| Qms | 0.876 | mechanical Q |
| Fs | 39.1 | Hz, free air resonance |
| Res | 7.0 | Ohms, DC resistance |
| Ls | 141.0 | µH, series inductance |
| Lp | 193.1 | µH, lossy series inductance |
| Rp | 2.379 | Ohms, loss across Lp |
| % shift | 47.7 | % resonance with box |
| Vas | 16.94 | litres, air volume equivalent |
| mms | 8.471 | grams, effective mass |
| cms | 1.956 | m/N, compliance |
| bl | 4.941 | T*m, motor strength |
| n0 | 163.1 | %, max efficiency |
| Spl sens | 84.12 | dB SPL max at 1w absorbed |
| xmax (lin) | +/- 5mm | linear |
| xmax (max) | +/- 10 mm | maximum |
| power | 50 watts | continuous |
| 100 watts | peak |
Frequency response:
- orange
band shows +/- 3 dB limits
- yellow band shows +/- 6 dB limits, both centred on 84 dB
Frequency response and distortion
Cumulative spectral decay
