Most beautiful speakers in the world ?

[somebodyelse]

I'd be interested to know how that array is wired.

 

[Salt]

You need a mix of parallel and serial topology.

 

[Arindal]

This is why, for example, the Grundig Monolith and the Heco Lab series were wired differently in the tweeter array.
I once had the circuit diagrams for this - I'll have to look for them.

To avoid lobing and phaseyness, basically the central tweeter dome has to operate alone from a surprisingly low frequency upwards. Like in the region of 3K, if the distance is less than 6cm between a tweeter and the neighboring one (applying Joe D´Apollito´s rule of thumb which was aiming at midranges). It is not only impractical but also working against the idea of increasing vertical directivity with the help of a tweeter array, as you get at least one octave of low directivity. I don't this was possible in the old days.

Erik of Perlisten has explained this, don't remember if it was at a trade fair or on YT. If I recall it correctly, his solution was to bring 3 domes closer to each other, with the central tweeter slightly recessed, and letting the latter work alone from 4K on, achieving directivity solely with the help of a waveguide, while below that crossover point it acts like a very small line source.

The Trick is to get the drivers close enough together and stack the bottom and top of the wave guides as close together as you can. It mitigates most of the lobing.

50 years ago such domes with minimum-diameter magnets which would allow them to come closer to each other, did not exist AFAIK.

With ribbons or slim planar tweeters, on the other hand, this might work, if the distance between the diaphragms is really minimal or the whole array is curved.

They lob worse than any speaker I've ever listened to, and they were still a lot of fun.

I don´t dispute the fun part, and some of these line concepts put out enormously tight bass, admittingly. But my experience is telling me that with the right classical material, some brass plus bright strings, you end up with pretty nasty phaseyness and cancellation effects, or some strangely dull upper treble. Having heard quite a number of line array speakers and hybrid concepts, I tend to prefer the ones with a single tweeter unit. If I recall it correctly, one of my most noteworthy personal disappointments was ADAM´s Olympic Sound system OSS, with curved AMT tweeter array.

 

[berjine]

Funny vintage HiFi furniture

 

[Pearljam5000]

 

[Pearljam5000]

 

[Pearljam5000]

 

[Axo1989]

Italian homage to Japanese jazz kissaten, speakers apparently custom.

 

[TulseLuper]

Perry Marshall Bitches Brew dipoles in solid walnut.

 

[Audionaut]

Beautiful with cat.
B&C PA coax as satellite from approx. 80 Hz
DIY (not the cat)

 

[Audionaut]

Bitches Brew dipoles

Spatial Europe MC5

 

[somebodyelse]

You need a mix of parallel and serial topology.

Obviously, but exactly what mix? Is it using shading similar to the CBTs for example? It doesn't look like a bessel array. Do they use a crossover so only the centre one plays the top end and the rings come in progressively lower? Or do they just look pretty but have terrible directivity problems?

 

[Audionaut]

Mich würde interessieren, wie dieses Array verdrahtet ist.

 

[Audionaut]

Inklang Ceterra 70R

 

[Arindal]

View attachment 480235

Looks like all tweeters are getting the same signal via a 3rd order highpass filter and that is it. Depending on tweeter geometry and distance from one to another, this bears the highest risk of lobing and phasey effects between the tweeters. It can work, though, it these are ribbon-shaped tweeters with very little spacing between neighboring ones.

 

[Pearljam5000]

 

[Reddoc]

View attachment 480458

I was wrong...

 

[Audionaut]

Es kann jedoch funktionieren, wenn es sich um bandförmige Hochtöner mit sehr geringem Abstand zwischen benachbarten Hochtönern handelt.

Dies ist die Frequenzweiche und Schaltung des Monacor Lightning, der Bändchenhochtöner verwendet.

Der Grundig Monolith 190 war ein Aktivlautsprecher und anders verdrahtet. Wenn ich mich recht erinnere, war es ein Bessel Array

A Paul Kemble web page - speaker bessel arrays.

Sound and sound systems - an informal look. Bessel arrays (speaker and microphone).

www.angelfire.com

PS

 

[Arindal]

This is the crossover and circuitry of the Monacor Lighthning, which uses ribbon tweeters.

Thanks. If I got the right spec sheet, every tweeter unit is 9.5cm tall, with an active diaphragm height of approx. 5cm. That leaves 4.5cm of distance between the active areas. Hard to predict the outcome, but I would expect some lobing or phase issues, which might also result from the line of midrange domes being positioned horizontally from the tweeters.

f I remember correctly, it was a Bessel Array

Which is in my understanding an attempt to limit excessive vertical narrowing of the radiation pattern solely by different levels and polarity of signals fed to the tweeters. Never really tried such, but I would expect similar results regarding interference and lobing (directivity pattern and listening window might be different, though).

 

[Audionaut]

Never really tried such, but I would expect similar results regarding interference and lobing (directivity pattern and listening window might be different, though).

Yes, I interpret it similarly.
It's been a very long time since I heard them - and they absolutely flashed me.

In hindsight, however, I assume that this insanely spacious sound panorama they created was a completely original interpretation of what is called a stage and had little to do with the recording engineer's intentions.