Phase as an issue in audio.

I know Jerry, but there's NOTHING on the Tellurium website other than a suggestion of pre-programming (create a "problem" to market a fix for) and subjective comments. I'm sure these wires are very good, but for "Plush" to suggest that £285 or so is a "modestly priced cable" is madness in the extreme :lol:

Anyway, if you like them in comparison to the usual Mark Grant and cheaper recommendations on here, then that's fine, 'cos at least you've compared :)

Back to bass absolute phase, I hear quite a difference here, but of course, I'm not switching "just" the drive units over, since the crossovers aren't symmetrical (my bridged power amps are specified as balanced on their outputs when used this way though so supposedly shouldn't react)..

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Originally Posted by f1eng

There is probably a significant difference between the 2 discussions here, absolute phase and phase shifts with frequency.
There are very, very few phase coherent speaker designs, so it is quite likely nobody on the forum has ever listened to phase coherent reproduction.

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I have heard phase coherent speakers many times, in anechoic, domestic and studio locations and they always have a greater realism than speakers that are not phase coherent. Time and phase are, in my opinion, paramount in reproduction of audio.

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Originally Posted by PaulStewart

I have heard phase coherent speakers many times, in anechoic, domestic and studio locations and they always have a greater realism than speakers that are not phase coherent. Time and phase are, in my opinion, paramount in reproduction of audio.

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Hi Guys

Would you consider the VMPS (Veritone Minimum Phase Speakers) range of speakers as Phase Coherent?
Sometimes manfacturer terminology can be confusing.

Andy - SDDW

How about full range single driver speakers?

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Originally Posted by Ali Tait

How about full range single driver speakers?

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Unlikely. Single driver speakers are working in cone breakup "NXT" mode at medium and high frequencies.
As soon as you get cone breakup you lose phase coherence. Phase coherence is lost in pretty well all crossovers too.

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Originally Posted by PaulStewart

I have heard phase coherent speakers many times, in anechoic, domestic and studio locations and they always have a greater realism than speakers that are not phase coherent. Time and phase are, in my opinion, paramount in reproduction of audio.

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Very interesting indeed. Which speakers are these please? Do you know how the designer and manufacturer managed to achieve phase coherence? If you heard them in anechoic conditions you -are- perhaps the designer??

As an engineer who started off life in noise and vibration research transducers have always fascinated me, and with this hobby I find microphones, pickup cartridges (and all the vibrating paraphernalia they are bolted to) and speakers particularly interesting.

Quote:

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Originally Posted by f1eng

Unlikely. Single driver speakers are working in cone breakup "NXT" mode at medium and high frequencies.
As soon as you get cone breakup you lose phase coherence. Phase coherence is lost in pretty well all crossovers too.

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So what about electrostatics then?

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Originally Posted by Ali Tait

So what about electrostatics then?

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In terms of phase accuracy (assuming you have a phase accurate recording, i.e. not mixed multi-track) planar drivers should be the most accurate, depending on design, and whether they have a crossover. So ribbons and electrostatics should be OK.
Most have other problems though :)

Yep, agreed. However in my experience statics have the most transparent sound of any speaker type. Wonder how much of this is due to phase coherence?

I recall adverts for a 4-way loudspeaker from a company called Orchid which claimed to be phase-coherent. Anyone remember that? It was mega money, about £20K.