Perlisten's mid/tweeter array

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MIJK

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Joined 2019
#1
Hi!

Does anybody have more info on the driver array Perlisten uses?
How does it work? What type of crossover and frequencies do they use?

I think the drivers might be Seas custom units, some of the components look like Seas made, but I am not shure.

If one would like to try it out DIY style, how would one go about? What drivers to use?

In my simple mind the use of such small drivers and membranes for the mid register could possibly be a superior sounding solution.

Would like to know what there is to know about this configuration, especially when it comes to crossovers used.
 
#2
To make sure everyone knows what we are talking about...

https://www.perlistenaudio.com/
Notice the tweeter waveguide... it is very interesting. It almost looks like the upper and lower tweeters are partially injecting into the waveguide ? But I know little about waveguide design, so just guessing.

Presentation1.png
 
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#4
Yep, hence my question here. Would be interesting to know more. Have anyone tried this with success? Preferably with wg. I guess the only thing I've seen come close is unityhorns, but those use fullrangers as additional drivers, with larger membrane.
 
#11
The Sony's are completely different. The perlistens use the extra side tweeters over a very narrow bandwidth at the bottom of the middle tweeters pass-band. The point of this is to narrow and control the directivity of the tweeter array in the vertical off axis. From measurements I've seen it appears to work very well. This is similar to the beam steering that B&O use in their whacky DSP Beolab.
 
#14
I was at the Sound Society HiFi show here in CPH DK last weekend and had the fortune to listen to both the r5t and the r7t.
What stood out to me, besides overall very very good sound, was the stereo perspective. It was unusually wide and precise. It was similar for the 2 set of speakers and I would therefor assume it is down to the concept of the tweeter/mid array. (it was probably down to the room/setup/where I was sitting but I actually liked the sound from the much cheaper r5t over the super expensive r7t Limited Edition 😉 )

Yes looking at the datasheet but also measurements done on eg. the r7t, it is obvious they know what they are doing and the directivity control is excellent. Good dir control you also find with horns like used by JBL, but the sound of the Perlisten was much more relaxed, but still as clear. (Had a good listen to a set of 4309 also at the show).

I asked about the XOver used and got the same story as can be read on Stereophile https://www.stereophile.com/content/perlisten-s7t-loudspeaker that all 3 domes are crossed over at ca 1.1 kHz and that the outer ones are rolled off over 4-5 kHz.

It is obvious that the waveguide for the mid tweeter controls the horizontal directivity for the higher frequencies and the top and bottom tweeter gives control of vertical dispersion, and I think as important the extra excursion to XOver at just over 1.1 kHz.

The XOvers seems very well built and quite complex

I can say that they played very loud in a large room, without really sounding to stressed, so good dbl capability.


There is no pseudo science about Perlisten :up: :up: :up:
 
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#16
But I'm also wondering if it is like "crossing the river to get water" ..... using a round waveguide with the same overall diameter as the DRC array, and a tweeter with enough Xmax would do the same job .... of course I do not know the Xmax of the tweeters used, and you could for sure develop some with higher Xmax paying with less sensivity, which would be ok for this use ... but using a SB26ADC with a Xmax pp of 1.2 mm can work quite deep. Dont really know of any high Xmax domes with small external size like used in Perlisten (need Neo and a small back chamber)
 
#18
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