Some info From DIY AUDIO :
Alpair 10 Gen. 2 introduction - diyAudio
I hope our builder has GEN 2
1 - Cones. All-new Multiform construction (as per other Gen. 2 Alpairs). The new profile is shallow. The overall depth has been reduced by 20% while 2 additional radii are added to its profile making this cone the most complex we've produced to date.
2 - Suspensions. Lui Yi Ping has "tweaked" the front suspension to reduce load resistance over the first 4-mm of travel. The new Nomex rear suspension is a new light grade synthetic material currently only being used on this driver. Note just how thin it is by looking at the parts pic.
3 - The new coil is a Japan made rectangle wire, tight-wound onto a light alu body. The complete coil assembly weighs under 4g being produced for us by a Japanese maker.
4 - Frame and connectors are all re-designed. The frame includes a new injection moulded seal. This increases the damping factor and makes installation easier. The connectors are new and include extensions for simple cable connection.
Outcomes:
The Alp10 Gen. 2 driver is a large step forward from the old model. It pushes more air, 28 litres compared to 19.5 while total Q is up to 0.35 (old model 0.33). The Resonance frequency on the new model is 36Hz (40Hz on the old model) while SPL remains at 87dB. From the technical standpoint, this driver is delivering allot more for your bucks.