darrenyeats wrote: > It's more than just distortion measurements. Some types of crossover are > only possible done actively e.g. time delay, all-pass phase correction > etc. Also it is about driver transient control which might not be > obvious from steady state distortion measurements. And also dynamic > range is better too since the whole system becomes 6db more efficient > (that's a 4x power equivalence). > > Also you get less amplifier-borne IM distortion because each driver has > its own power amp channel. > > All assuming similar quality components otherwise ... as stated. > Darren > > Sent from my Nexus 10 using Tapatalk HD
As I understand re transient controll if you loose the series impedance of the filter components and bolt the amp,directly to the drivers all that damping factor the amp provides can do its thing much better , an analogy would be like towing something with a rubberband ( passive filter ). The back emf from the driver just "shorts out" via the almost zero impedance of the amp and the driver stops when the signal stops , less transient ringin . Unless we have a bass reflex speaker then some of that is unavoidable even in an active design . If you put a single transient pulse to a driver it usually don't just do that pulse it wobbles about a while after . An active design can also choose a different bass reflex alignment that requires filter assistance below the port frequency ,this is also unpractical in passive speakers . This well behaved transient controll can be behind the reputation active designs have for sounding dry no bloom or boom and as most people never had heard anything else and are used to more colourfull speakers they get a surprise and may think it is something wrong ? ------------------------------------------------------------------------ Mnyb's Profile: http://forums.slimdevices.com/member.php?userid=4143 View this thread: http://forums.slimdevices.com/showthread.php?t=98249 _______________________________________________ audiophiles mailing list [email protected] http://lists.slimdevices.com/mailman/listinfo/audiophiles
