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In Reply to: RE: understood. NT posted by tedtag on May 18, 2016 at 01:26:06
Ask John to provide you with a proper free-field measurement that shows nominal 90db sensitivity over the full range of the speaker.Dave.
Edits: 05/18/16Follow Ups:
I don't know that he gets the full 90 db sensitivity but his XO is not spaced by an octave like the original so can produce more midrange energy, and the bracing bumps up the bass output - particularly reduces bass compression.
I measured 2-3 db difference going from the passive TIV XO to passive line level 1st order symmetrical measured at 100hz or so.
I explained the technical aspects of his claim years back on this forum.
Switching from a passive speaker-level crossover to a line-level crossover is a completely different topic.
Dave.
IIRC I think the PG XO lets the bass panel operate significantly higher up - by an octave or so and at 1st order Which is why I think he gets higher output at the same power in the midrange.
It doesn't help that Magnepan specifies the baseline sensitivity of their speakers with a 2 watt input at a single frequency. (Much confusion and incorrect relative comparisons result.)
I explained all of this and the Magnestand crossover "re-alignment" configuration years ago.
You do remember, yes? :)
Dave.
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