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Speaker Asylum General speaker questions for audio and home theater. |
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Speaker Asylum General speaker questions for audio and home theater. |
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In Reply to: RE: The web blurb doesn't say they are time aligned... posted by jupiterboy on July 18, 2014 at 11:33:02:
They claim they have a time-coherent (transient perfect) loudspeaker with a cap and coil for an MTM design with no baffle or driver offset. "Cap and coil" is a 1st order electric crossover. To get a first order acoustic response with a 1st order electrical crossover using just driver matching is, in my mind, quite a feat.But, according to theory you can't have a *true* transient accurate crossover unless you have a transient accurate acoustic response *and* drivers have their acoustic centers lined up. There are also other types of crossovers which can yield a transient accurate response, such as the B&O filler driver approach, or subtractive delays designs, or with group-delay correction in the DSP realm. In the DSP realm, anything is possible...
It's a simple matter of seeing this speaker's step response.
I'm skeptical, but if this speaker does have a transient accurate step response, I'd love to figure out how the heck they pulled it off. They may be guilty of taking a liberty with word usage "time coherent". A phase coherent speaker does not necessarily have constant group delay. The LR4 acoustic response is phase coherent but not time coherent, for example.
These terms sometimes mean different things to different people, depending on who you ask - and what you ask...
Cheers,
Presto
Edits: 07/18/14
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Follow Ups
- RE: The web blurb doesn't say they are time aligned... - Presto 12:23:07 07/18/14 (1)
- RE: The web blurb doesn't say they are time aligned... - jupiterboy 12:54:41 07/18/14 (0)
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