Radiant Acoustics Clarity 66

[Puddingbuks]

Just released, 7.998 euro a pair:

“Clarity 66 is the ultimate expression of the Clarity design philosophy. A full-range floor-standing speaker designed for extreme precision, immense power, deep linear bass, and distortion below the threshold of audibility. Capable of reaching breathtaking low frequencies with authority and composure, it does so without sacrificing linearity or control. Every element is mathematically optimized and engineered as part of one coherent acoustic system, achieving unmatched performance and refinement.”

From the website:

THE PINNACLE OF CLARITY

Clarity 66 is the full‑range floor‑standing realization of everything we set out to achieve with the Clarity series: extreme precision, effortless dynamics, and distortion pushed below the threshold of audibility. It’s designed to play deep, clean, and controlled without changing character when the music gets demanding.

Clarity 66 is built as a true 2-way design focused on coherence, timing, and a crystal-clear midrange. The two woofers run in parallel, sharing the load for higher headroom, deeper linear bass and dramatically lower distortion. As the two woofers are identical and always play the exact same frequencies, every last drop of punch and dynamics is maintained. Additionally, with just one crossover region, phase is easier to manage, and the vocal band stays intact. Images snap into place, voices feel immediate, and the soundstage holds steady across a wide listening area.

Usually, designing a floor-standing speaker with this amount of bass extension as a pure 2-way speaker would require too many compromises in the midrange, as the two woofers would struggle to play the deepest bass without modulating or distorting the midrange. However, due to the performance parameters of the PURIFI USHINDI woofers, this problem has been solved.

As such, the design of the Clarity 66 is simple, but executed at the highest level, so you hear the full extent of the recording and none of the system. Effectively, what you end up with is all the advantages from a classic 2-way system, combined with the heft and low-end extension from the best 3-way systems.

 

[Puddingbuks]

Curious, would like to hear them. Wonder if the claimed reduction of distortion could also be obtained by high passing (80hz) a Clarity 6.2?


Measurements

The Clarity speakers were measured at a height of 3.7 m above the floor in a large hall using PURIFI’s proprietary measurement setup. A calibrated GRAS 46AC microphone was used.

SPL AND IMPEDANCE
The free field measurement at 2.5 m distance and near-field as well as mic-in-the-box measurements were post processed to a synthesized anechoic SPL response with high resolution down to below 20Hz.

HORIZONTAL POLAR RESPONSE
The horizontal polar response at the tweeter height was recorded in 10-degree steps. The plot shows the response normalized to the Listening Window (i.e. average over 0-30 deg).

 

[3125b]

Great job on the design, this makes the surrounds not look so ... diseased.
FR isn't particularly flat though, the tweeter kinda got away from them.

 

[Paul7777x]

I do wonder if there’s anything to be gained from using these as opposed to the 6.2s and a pair of Subwoofers properly DSP’d together.

In my case using Lyngdorfs RP.

I’d quite like to see a comparison, unlikely as that might be.

 

[Paul7777x]

Great job on the design, this makes the surrounds not look so ... diseased.
FR isn't particularly flat though, the tweeter kinda got away from them.

No accounting, as they say, for personal taste.

Those grooves ruin an otherwise sharp looking speaker to my eyes.

Might be interesting to see what the response looks like when/if Lyngdorf programme a ‘pre’ profile for their amps.

 

[3125b]

Those grooves ruin an otherwise sharp looking speaker to my eyes.

Fair enough, that's a matter of taste.

What I mean is that they did something different, interesting. They didn't just screw the drivers into wooden boxes with exposed screws which is what a lot of companies do. But that always looks so lazy.
It's fine for DIY because it's difficult to make a proper panel (or some smaller covers) to cover and shape the baffle, but for a company manufacturing these things in series, I would expect that.

 

[Paul7777x]

I agree. Hiding the screws/bolts is a good move.

Should be compulsory.

On the 4.2, 6.2 and now the new speaker, it’s what helps make them so clean looking.

Which is why I don’t understand the grooves part.

Again, it’s personal taste; but it looks like a tall stand mount on a crap stand.

 

[LTig]

Any reason (regarding SQ) to prefer those over a pair of KH420 (a bit more expensive but no power amp required)?

 

[Paul7777x]

We need another picture.

 

[LEA-Ebenisterie]

They said it's a 2 way and not 2.5 Way so I posted a message on their video roughly asking :

I read on their website that crossover point is at 2.4kHz

Really curious as λ (wavelength in m) = c (wavelength speed propagation in the air at 20°C and 1013HPa of atmospherical pressure in m/s) / f (Frequency in Hz) = 343/2400 = 0.1429m => As 6.5" drivers measure 0.1651m, means the wavelength at crossoverpoint is roughly the same size as the driver, so between the top and the bottom of the driver, that Frequency should nearly cancel, but let's admit that's fairly ok (which is already not much honestly), the thing is that now there are two drivers doing the same, now it certainly gets worse I assume (Especially between 1 and 2.4kHz as at 1Kkz it still can cancel between the top of the top driver and the bottom of the bottom driver), that's why most of manufacturers make a 2.5 Way with the 2nd driver crossing at a different Frequency, preventing that problem.

So, I truely wonder how they deal with that, and I'm quite curious to see Klippel vertical off Axis measurements, which would most certainly pinpoint that issue and look quite bad.

 

[Paul7777x]

Hard to see Erin or Amirm getting a pair as there’s no US importer to borrow one from alas.

 

[Paul7777x]

Whilst I’m being a bit daft here, I’d also like to se a comparison between these and the Kef Blade 2 Meta.

It’s reasonable to say the Kef is amongst the top of the class in passive hifi speakers.

And therefore a comparison between the best and the ‘newest’ driver tech might prove illuminating.

Certainly very interesting to those of us who enjoy such things. And I’m assuming a majority here do.

 

[Paul7777x]

They said it's a 2 way and not 2.5 Way so I posted a message on their video roughly asking :

I read on their website that crossover point is at 2.4kHz

Really curious as λ = c / f = 343/2400 = 0.1429m => As 6.5" drivers measure 0.1651m, means the wavelength at crossoverpoint is roughly the same size as the driver, so between the top and the bottom of the driver, that Frequency should nearly cancel, but let's admit that's fairly ok (which is already not much honestly), the thing is that now there are two drivers doing the same, now it certainly gets worse I assume (Especially between 1 and 2.4kHz as at 1Kkz it still can cancel between the top of the top driver and the bottom of the bottom driver), that's why most of manufacturers make a 2.5 Way with the 2nd driver crossing at a different Frequency, preventing that problem.

So, I truely wonder how they deal with that, and I'm quite curious to see Klippel vertical off Axis measurements, which would most certainly pinpoint that issue and look quite bad.

I did not know any of that.

Now I need to know.

It seems the horizontal is near textbook perfect.

 

[LEA-Ebenisterie]

I did not know any of that.

Now I need to know.

It seems the horizontal is near textbook perfect.

That's basic acoustics.

And that's why I'm kinda disappointed to see a presumed error (not much presumed, honestly, as they provided Horizontal but not vertical measurments, surprisingly) like this at this price-point.

I love PuriFi drivers, I think they bring lots of new technologies/Ideas and pushed it all the way, along with Kartesian in the industry, but if it's truely like this, it's a total joke, imho.

 

[Rick63]

Yeah, I can't get past those woofer surrounds...

 

[Woofersnoofer]

They did the hand wavy thing without explaining how they got the bottom woofer to integrate with the tweeter. Because they are super low distortion? So are they saying this gives them wiggle room where the errors are not so noticeable in the vertical plot? I don't see how honestly, nor did i see a vertical plot lol.

Anyway handsome looking speaker.

 

[LEA-Ebenisterie]

They did the hand wavy thing without explaining how they got the bottom woofer to integrate with the tweeter. Because they are super low distortion? So are they saying this gives them wiggle room where the errors are not so noticeable in the vertical plot? I don't see how honestly, nor did i see a vertical plot lol.

Anyway handsome looking speaker.

Low distortion won't solve phase issues, indeed haha, but yeah, may be they wanted people to watch somewhere else, which didn't work for me.

And low distortion is already a thing with only one of whatever woofer you take from PuriFi in the Ushindi range, so including this exaplanation for the 2 Woofer/2 Way design is kinda meh for me.

 

[Paul7777x]

I do wonder if there’s anything to be gained from using these as opposed to the 6.2s and a pair of Subwoofers properly DSP’d together.

In my case using Lyngdorfs RP.

I’d quite like to see a comparison, unlikely as that might be.

Just a thought.

But, a pair of 6.2s and a Lyngdorf TDAi 2210 is the same price as the 66 pair.

Add another thousand pounds for a pair of subs and the 66’s look expensive.

Unless you already have a high power, high quality amp naturally.

 

[Matt_Holland]

Not a 2.5-way

 

[henz]

Hard to see Erin or Amirm getting a pair as there’s no US importer to borrow one from alas.

We'll make sure Erin gets a pair.