AsciLab F6B Bookshelf Speaker Review

[AsciLab]

That sounds very interesting, so you mechanically modify/adjust the tweeters? Hope you can write a bit more about it without being in conflict with your company know how secrets.

Post in thread 'AsciLab speakers are about to launch'
https://audiosciencereview.com/foru...eakers-are-about-to-launch.54794/post-2083957

Here is more explain.

 

[thewas]

Post in thread 'AsciLab speakers are about to launch'
https://audiosciencereview.com/foru...eakers-are-about-to-launch.54794/post-2083957

Here is more explain.

Thank you very much again, although now I am curious have you correct the voice coil rest position.

 

[AsciLab]

Thank you very much again, although now I am curious have you correct the voice coil rest position.

It is varied by sample. The tweeter voice coil length is too short to keep exact position in the mass production. For most of using it won’t be a problem. Just we have serious tolerance standard

 

[thewas]

It is varied by sample. The tweeter voice coil length is too short to keep exact position in the mass production. For most of using it won’t be a problem. Just we have serious tolerance standard

But do you modify the ones which are not optimal to become so or what do you do with such, resell them to Revel?

 

[AsciLab]

But do you modify the ones which are not optimal to become so or what do you do with such, resell them to Revel?

Lol. To Revel, you can buy our speaker to use that tweeter!

Yes. We have our standard for the tweeter.
We check it, adjust it and pass it or not.

 

[Postlan]

It is varied by sample. The tweeter voice coil length is too short to keep exact position in the mass production. For most of using it won’t be a problem. Just we have serious tolerance standard

High rejection rate?

 

[AsciLab]

High rejection rate?

No, After adjusting most of them is passed. One of dozens sometimes is rejected.

 

[dfuller]

I would love to see a 3-way design/implementation from AsciLab with a midrange driver covering the range 350~3500 (ATC ).

To be clear, there are very few midrange drivers of any variety that are usable across that entire frequency band. Even Bliesma's absolutely excellent mid domes aren't really comfortable crossing below 500hz with an LR4 - and those are goofy expensive drivers.

It is varied by sample. The tweeter voice coil length is too short to keep exact position in the mass production. For most of using it won’t be a problem. Just we have serious tolerance standard

This, I think, is part of why most people don't cross tweeters that low. You start to reach their excursion limits. It must be a very robust tweeter to handle Fc of 1100hz too, the only speakers I know of other than Ascilabs that cross tweeters near there are D&D 8Cs, which use a DSP limiter.

Do these have a passive limiter like some Amphions do? I know Amphion have an Fc of around 1600hz and had real problems with tweeters popping until they added the limiters.

 

[Short38]

So the big boys could improve their margins by integrating these and then use their probably adequate bottoms. Voila actual sota

 

[Chr1]

Wow...
Seems I have decided that I do actually need more speakers.

WTAF?

 

[AsciLab]

To be clear, there are very few midrange drivers of any variety that are usable across that entire frequency band. Even Bliesma's absolutely excellent mid domes aren't really comfortable crossing below 500hz with an LR4 - and those are goofy expensive drivers.


This, I think, is part of why most people don't cross tweeters that low. You start to reach their excursion limits. It must be a very robust tweeter to handle Fc of 1100hz too, the only speakers I know of other than Ascilabs that cross tweeters near there are D&D 8Cs, which use a DSP limiter.

Do these have a passive limiter like some Amphions do? I know Amphion have an Fc of around 1600hz and had real problems with tweeters popping until they added the limiters.

AFAIK, Amphion crossover is not 1.6kHz. Spec sheet says that, but it’s not. It is rather around 1kHz like us. You can see sound and recording One18 review.

Amphion One18: Passiver 2-Wege-Monitor mit externer Endstufe im Test

Amphion aus Finnland entwickelt und fertigt Lautsprecher für den professionellen Studio-Einsatz und für den gehobenen Consumer-Markt. Auf der Amphion-Homepage wird zwischen Consumer-Produkten und Studiomonitoren unterschieden. Bei den Studiomonitoren finden sich fünf passive 2-Wege-Monitore der...

www.soundandrecording.de

The vertical null point is below 1kHz. Additionally Amphion also uses phase mismatch between woofer and tweeter. Also you can see Napilopez’s review.

Amphion Argon1 Quasi-Anechoic Spinorama and Measurements (Updated)

I recently got the Ampion Argon1s in for review. Though I haven't had time to run the full suite of measurements (hard to find the time to run 70 sweeps without annoying my SO) I did run some horizontal measurements today. I'll probably redo them as they were a little more rushed than I'd...

www.audiosciencereview.com

Phase mismatch at crossover point may look to make wider vertical dispersion, but it can make uneven radiation for 2 driver 2-way speaker(it is more helpful for MTM type speaker) and requires higher produce level due to cancelling each other.

We don’t have limiter in speaker. Thanks to deep waveguide loading, the stimulus for tweeter is similar like 1.8kHz crossover.

 

[nawfal07]

@AsciLab I’m interested to replace my current speakers but that will mean eventually completely move to your line. My stereo setup also doubles as a home theater, so when that happens I’m also going to need a center speaker. Do you have that in the works?

 

[dfuller]

We don’t have limiter in speaker. Thanks to deep waveguide loading, the stimulus for tweeter is similar like 1.8kHz crossover.

Ah, I see - so because the waveguide is acting more like a horn at those frequencies, you're able to have the electrical filter slope higher than the acoustic one. Makes sense!

 

[EJ3]

This is a review, listening tests and detailed measurements of the AsciLab F6B stand mount speaker. It was sent to me by the company and costs US $835 for a pair (shipping included).
View attachment 455756

AsciLab F6B Speaker Listening Tests
Just like the F6Bs, the immediate impression was warm and ultra clean detail. Here, the F6B went lower, producing a full range response. It actually played my sub-bass track at low to almost medium level. Above that, distortion in bass sets in and gets out of control.

I felt no need to change anything with EQ. Every track in my reference library was produced with excellent fidelity, making me want to just sit there and listen. Alas, I had to stop and come and share the results with news with you!

Conclusions
The level of refinement oozes from every aspect of the F6B from external design to objective measurements. It is nearly perfect given its physical size. Compared to F6Bs, it brings good level of bass response but with a loudness limit. You could dial in a high-pass filter and get more loudness out of the bass region especially if you have a sub.

When you include the price in the equation, I am at a loss to recommend alternatives to the F6B. It is that good!

I am happy to recommend the AsciLab F6B speaker.
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I hope that they will make a floor stander that will get down to 27 HZ.
(The lowest note on a grand piano has a frequency of 27.5 Hz.)

 

[AsciLab]

I hope that they will make a floor stander that will get down to 27 HZ.
(The lowest note on a grand piano has a frequency of 27.5 Hz.)

Once the basic design is complete, the sample production and NFS (Near Field Scanner) measurement process can be finished within a day or two. By repeating this process quickly, we can achieve excellent results while significantly shortening the development timeline.

In the case of the tower speaker, we expect to have the final sample and measurement results ready for release within a month or two. Of course, an additional two months will likely be required before the product is officially launched.

We had initially postponed the tower speaker release until a dealer network was in place, but since the network is expected to be established sooner than anticipated, we have already begun development.

 

[AsciLab]

Center Channel for surround 5.1 planed?

Yes, development is nearly complete, but since the production and shipping of the C6B and F6B take priority, the first sample is expected to be ready around July.

 

[perceptionist]

Let us know when you make your 3-way available, center, bookshelf, floorstansing or not.

 

[capslock]

Thanks for the review. Next, can we please have a review of the C6B?

(I am still at odds with the price jump from the F6B, the SB CAC drivers are not that much more expensive than their fiber siblings.)

 

[Todd68]

These seem like a bargain, I don’t like the low sensitivity though. Would they be good for near field listening?

 

[amirm]

Would they be good for near field listening?

Of course.