I was invited to listen to a pair of
Aries Cerat Aurora speakers today.
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What they are:
Tweeters: a ribbon speaker, open back (dipole) with some kind of waveguide in front of it.
Midrange: a conventional driver buried in a hyperspherical horn (meaning the horn folds back on itself after reaching maximum flare). The idea is to reduce diffraction anomalies. The rear of the driver is open, so it's a semi-dipole!
Bass: four giant woofers mounted to fire outwards omnidirectionally. As you can see, the rear is open.
In addition, there is a fancy crossover network (giant box behind the speaker). I didn't take a photo of it, but:
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You can control the crossover via Bluetooth. It's not a DSP box - it consists of passive components connected by relays that switch depending on what you select on your app. So it is a
configurable fully analog passive crossover. I have never seen anything like this. It's certainly a good idea to have some kind of tuning ability, but DSP would be cheaper and much more precise. But then you don't get a massive box of components and the boasting rights that there is no digital in the signal chain.
Sound: from about 200Hz up (my estimate) it was incredible. It wasn't exactly what I would call neutral, it seems to have a lifted treble response. But it could go REALLY LOUD and do so without any stress whatsoever. Very impressive. Below 200Hz, it all falls apart. There is some kind of nasty bass bump, and very little low bass. I heard it immediately when I played full range orchestra, it was audible as a single note droning sound. My guess is about 150Hz or so. I walked up and down the room and I could still hear it no matter what distance I was at, so it was a speaker problem and not a room problem.
I asked the dealer "do you hear that???" and he said "perhaps I have the wrong settings on my configurator, I have been trying to dial them in over the last week and i'm not done yet". I told him I could dial them in an hour if I had my microphone with me. He's a really nice and friendly guy. The last time he invited me to visit, he said he would love to have me around to measure his listening room. But he has only ever invited me over for listening. I told him I might be able to make these speakers irresistible, they are SO CLOSE to sounding awesome.
Would I pick them over my all-time favourite, the Alsyvox? Definitely not. The Alsyvox has a certain kind of fine articulation that these speakers don't have.
All these are obviously my subjective impressions. IF I ever get my microphone into that room, i'll be able to tell you guys a lot more.