I've been thinking about Darren's comments on the DSP x-overs... I'm not sure of the block diagram of the Meridian DSP speakers, but with any multi-way speaker the driver sensitivities are usally different by a small number of dB. One of the benefits of (any form of) active crossover is that this can be taken care of - and response flattened - in the x-over at line level.
Given that the DSP's have digital x-overs... and that a digital x-over (unlike an analogue one) cannot boost (>0dB!)... IF the drivers need to be adjusted for relative sensitivity (which is almost certain) then there are 2 ways Meridian could do this: 1) by altering the relative ANALOGUE gain of the power amps, post x-over 2) reducing the level of all of them DIGITALLY by different amounts... If they used method 2... then regardless of what you put in, you won't get 96dB of SNR/Dynamic Range out on redbook material. Hypothetical example - let's say the bass and tweeter have sensitivities of 90dB but the midrange has one of 87dB. The Bass and Tweeter will need 3dB of attenuation. This is ignoring any additonal DSP (ie attenuation!) required to flatten the in-band frequency response of the individual drivers themselves. They could be using a hybrid approach with make-up gain in the analogue power amps as well as DSP attenuation. Therefore the problem/issue that mswlogo is describing may well be confined to / exacerbated by the Meridian implementation. This is all speculation - but it would explain the differences in opinion/findings in this thread! -- Phil Leigh You want to see the signal path BEFORE it gets onto a CD/vinyl...it ain't what you'd call minimal... Touch(wired/XP) - TACT 2.2X (Linear PSU) + Good Vibrations S/W - MF Triplethreat(Audiocom full mods) - Linn 5103 - Aktiv 5.1 system (6x LK140's, ESPEK/TRIKAN/KATAN/SEIZMIK 10.5), Townsend Supertweeters, Blue Jeans Digital,Kimber Speaker & Chord Interconnect cables Kitchen Boom, Outdoors: SB Radio ------------------------------------------------------------------------ Phil Leigh's Profile: http://forums.slimdevices.com/member.php?userid=85 View this thread: http://forums.slimdevices.com/showthread.php?t=77725 _______________________________________________ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/audiophiles
