Apropå val av element och (motor)dist hos Seas(w18EX001) , Peerless (850439), SS m fl: Kolla in
http://www.linkwitzlab.com/mid_dist.htm
Jag citerar hans sammanfattning:
"A most remarkable driver is the SEAS W18EX001 because of its excellent linearity, though its burst performance degrades somewhat at 1200 Hz and above, even with no cone breakup below 3 kHz. It is well built with an open cast basket, fully vented spider, and no pole vent.
The Peerless HDS 850439 is the definite leader in the performance versus price category for this group. It is well designed and built.
While the Vifa P21WO-20 has low non-linear distortion it suffers from excessive energy storage. I think that is the reason why it did not exhibit the transparency of the 21W/8554 when I have used it.
The popular 18W/8545, while excellent on bursts, gave a somewhat disappointing impression on non-linear distortion, though it has the same SD-1 motor as the 18W/8546. The different, stiffer suspension might be the cause of this.
The Accuton C92/6 gives no indication of cone breakup below 4 kHz, but its moving elements store some amount of energy, as does the Seas W18EX001 with its rigid metal cone. The non-linear performance of the C92/6 was below the average in its group."