"Eiron"

Some Kike Idiot posted.

http://www.definitivetech.com/specs/...ml#poweredsubs


Thanks for the example. First one I've seen.


** Chinese sub-woofer " plate amplifiers " are nearly all made like this.

A total scam.



That one does feed the speakers via a first order HP crossover,
or in other words, through a capacitor.


** A very cheap and nasty bi-polar electro of about 250 uF.


The turnover frequency varies
according to your speakers, their impedance and Q of any bass resonances
and the tolerance of the capacitor.


** The x-over frequency is basically non existent with most bookshelf
speakers - whether tuned reflex or sealed.

All bass resonance damping is * completely lost * and little if any of the
desired reduction in cone excursion at sub bass frequencies is supplied by
such a series cap.

A total scam.


A bit of a lottery really.


** Might be OK with a pair of Quad ESL57s.

Nothing else.




....... Phil