These are the measurements of a used/vintage Phase Tech PC 3.1 center speaker. I believe it originally cost US $600. I was kindly sent to me by a member:
As you can see, the sample is a crusty one!
I must say, I had not seen foam over woofers before. You can rotate the midrange/tweeter assembly as to use the speaker vertically.
Owner told me that this was one of the companies paying attention to directivity as being an important thing. Seeing how it has a mid-range, gives me hope that it delivers on that.
These write-up is rather brief because I am not sure if I have a working sample. I cannot find any measurements of this unit. There is some for the version 2 which looks better.
Phase Tech PC 3.1 Speaker Measurements
Our anechoic frequency response shows clear problem where the mid-range is supposed to be delivering:
From memory, the midrange is crossed from 700 Hz. That would in theory fill that hole but maybe they wanted this kind of V shaped response. Besides that, we have a few wide resonances. Directivity is not great causing early window and predicted in-room responses leaving something to be desired:
As noted, the mid-range should be solving the beaming issue with dual drivers but it clearly is not:
Vertically of course doesn't have that problem:
I was surprised and dismayed that I could clearly hear distortion at 94 dBSPL:
This is topped by very low impedance:
Finally, waterfall shows resonances as we would expect:
Conclusions
It should be obvious that this is either a broken speaker or broken by design. I can't be sure which is which. Could have discarded the measurements but after all the work that went into it (including confirming that the midrange was working), I thought I post it anyway.
------------
As always, questions, comments, recommendations, etc. are welcome.
Any donations are much appreciated using: https://www.audiosciencereview.com/forum/index.php?threads/how-to-support-audio-science-review.8150/
As you can see, the sample is a crusty one!
Owner told me that this was one of the companies paying attention to directivity as being an important thing. Seeing how it has a mid-range, gives me hope that it delivers on that.
These write-up is rather brief because I am not sure if I have a working sample. I cannot find any measurements of this unit. There is some for the version 2 which looks better.
Phase Tech PC 3.1 Speaker Measurements
Our anechoic frequency response shows clear problem where the mid-range is supposed to be delivering:
From memory, the midrange is crossed from 700 Hz. That would in theory fill that hole but maybe they wanted this kind of V shaped response. Besides that, we have a few wide resonances. Directivity is not great causing early window and predicted in-room responses leaving something to be desired:
As noted, the mid-range should be solving the beaming issue with dual drivers but it clearly is not:
Vertically of course doesn't have that problem:
I was surprised and dismayed that I could clearly hear distortion at 94 dBSPL:
This is topped by very low impedance:
Finally, waterfall shows resonances as we would expect:
Conclusions
It should be obvious that this is either a broken speaker or broken by design. I can't be sure which is which. Could have discarded the measurements but after all the work that went into it (including confirming that the midrange was working), I thought I post it anyway.
------------
As always, questions, comments, recommendations, etc. are welcome.
Any donations are much appreciated using: https://www.audiosciencereview.com/forum/index.php?threads/how-to-support-audio-science-review.8150/