AsciLab F6B Bookshelf Speaker Review

[jEDGEc0m]

Is there anyone here that have mine combo f6B and fosi Audio V3 mono?

-And tried another combo than V3, and it was better?

I have AsciLab F6B and pair of Fosi V3 Mono amps.

Not exactly a big difference in amp, and it was just before I got the AsciLab speakers - but I played one of the stereo pair speakers powered with a V3 mono, and the other from one channel of a Fosi V3 stereo amp (which doesn't have a more load independent PFFB).

In short, once volume matched, no audible difference to me.
and also took some kind of measurement with UMIK1.

Some more about that here if interested.

Fosi v3 Mono - User Impressions | Owner's Thread

Fair enough. I always expect amps to get toasty. It’s what they do. On a cold night a guitar amp can cheer things up quite a bit.

www.audiosciencereview.com

Now with the F6B and Fosi V3 mono, I'm very comfortable that I am nowhere near running the amps close to their power limits. and that changing amps, as long as they aren't coloured or effectively flawed is not going to make an audible difference.

I play the F6B speakers mostly with subs - so the speakers don't have to work that hard - but I also have a setup I sometimes use that is just the F6B speakers+V3 Mono, with eq to make the speakers have a pleasantly bassy sound without subs. (and I have boosted some bass frequencies to help with room response) Depending on the bass levels of the source music and playback volume, I have perceived that it's possible to push the F6B woofer beyond comfort zone, into audible distortion. But I would say this is still waaaay before the Fosi V3 mono is putting out all of its clean power.

 

[Langestijn]

Hi all, for my living room I'm thinking of buying these speakers, still missing amps and pre-amp for the vinyl player (Rega planar 2) thats coming though.
I'm thinking of getting a Yamaha A-S501 (since it also has pre-amp). The 501 would be able to drive these speakers, right?

 

[Power Pop 23]

Hi all, for my living room I'm thinking of buying these speakers, still missing amps and pre-amp for the vinyl player (Rega planar 2) thats coming though.
I'm thinking of getting a Yamaha A-S501 (since it also has pre-amp). The 501 would be able to drive these speakers, right?

Yes, assuming typical sound pressure levels at a listening distance of 20 feet or less.

 

[Langestijn]

Perfect, thanks for the quick answer. Because I presumed the Yamaha A-S301 would be too weak right?

 

[Power Pop 23]

Perfect, thanks for the quick answer. Because I presumed the Yamaha A-S301 would be too weak right?

Not necessarily,

It depends on your listening distance and how loud a sound pressure level you desire.

I conservatively estimate a Yamaha A-S301 will work with the F6B within a listening distance of 12 feet.

 

[Langestijn]

Hmm we sit about 3 meters away when watching tv (which i would like to connect somehow if it is possible for movies and such) but it's also to fill the room with music when doing house stuff. the room is about 5 x 9 meters and the speakers will be in a "corner" of the room. So I think better safe than sorry and take the 501

 

[Everett T]

Hmm we sit about 3 meters away when watching tv (which i would like to connect somehow if it is possible for movies and such) but it's also to fill the room with music when doing house stuff. the room is about 5 x 9 meters and the speakers will be in a "corner" of the room. So I think better safe than sorry and take the 501

I hope you have a sub, because filling your room without one will be challenging at above average listening levels. (75db to 85db) Otherwise I believe your MLP is just fine.

 

[Langestijn]

Nah, don't have a sub, because I don't want to annoy the neighbours haha. Mayyyyybe in the future.

 

[Everett T]

Nah, don't have a sub, because I don't want to annoy the neighbours haha. Mayyyyybe in the future.

Then it sounds like you'll be fine as you're considerate of your neighbors. You may want one even at lower volumes when playing for the whole area, it will help with keep the volume down, actually.

 

[Langestijn]

Meh, I'm doubting to go for the c6b since there is a more clear window when they will be released on audiophonics, and they are a bit better of course... buuuut, it's about 50% more expensive, so it's quite a bumb in price (900 euros vs 1350 euros).

Just to make my choice a bit easier. Would the Yamaha AS-501 also be able to drive the C6B properly?

 

[MarkS]

Yes.

 

[JoshK]

So, I've had these for since July and I am again not quite happy with the sound and I am pretty sure I know why and it isn't per se Ascilab's fault.

They are quite boomy in my LP shelf near a back wall. All bookshelves I've owned, which isn't more than a handful were, regardless of the apartment/location they were in compare to my main floor-standers that are out in the room a bit. How much baffle step correction are baked in? Were the measurements done with the speakers on stands out in the room? Ostensibly I can correct this in my WIIM Ultra, because they aren't bad, just the tonal balance is way off

 

[LumiAudioNut]

For a number of weeks most (or all) of Ascilabs speakers seem to be sold out with the only option being to add a speaker to a “wish list”. Does anyone know if this is due to the tariff situation (I’m in the USA) or is this merely a production issue?

The A6B is particularly intriguing and a possible upgrade from my KEF R3 meta’s (a much less expensive than upgrading to the KEF Reference 1’s or LS60’s (not to keen to put all my eggs in one basket with this all in one).

Ascilab – Precision Redefined in Sound

Ascilab,C6B, F6B, A6B

ascilab.com

 

[Andrew767]

I bought Genelec 8351B rather than wait for ascilab cardiod. Besides, it's too tall.

 

[Andrew767]

Cardiod is only good if you have no capability to do DSP. People spend a lot on Dutch and Dutch, when they could just use Dirac to solve peaks

 

[Jiraya369]

Is there anyone here that have mine combo f6B and fosi Audio V3 mono?

-And tried another combo than V3, and it was better?

main issue with v3 mono is that it could get fried, in terms of sound you can get objectively better stuff but will you hear it? I highly doubt it. That combination you have is an utterly splendid one

Focus on getting a UMIK-1 and calibrating the low-end instead of other stuff

 

[amirm]

For a number of weeks most (or all) of Ascilabs speakers seem to be sold out with the only option being to add a speaker to a “wish list”. Does anyone know if this is due to the tariff situation (I’m in the USA) or is this merely a production issue?

Production issue. We placed our order in summer and just now getting C6B series. F6B series just finished production but will take another 4 to 6 weeks to get to us. We can't yet place a new order due to difficulty to produce these. Tariff is not a factor as we are paying that.

 

[amirm]

Were the measurements done with the speakers on stands out in the room?

My measurements and that of the company are anechoic so no room. You need to measure your room and use DSP to pull down the peaks. That will get rid of the boominess. Certainly placing them closer to the wall will aggravate this.

 

[RexrothPigeon]

Cardiod is only good if you have no capability to do DSP. People spend a lot on Dutch and Dutch, when they could just use Dirac to solve peaks

false, cardioid + dsp ftw

 

[MarkS]

Ascilab sent out this email last week. I posted it in the main Ascilab thread, but here it is again:

Dear customers,

We will inform you of the product restocking schedule.

Product Restock Schedule

C6B: Scheduled to restock on December 8, 2025

F6B: Scheduled to restock mid-January 2026

A6B: Scheduled to restock January 2026

Upcoming Product Releases – Q1 2026 (Pricing TBD)

S6B – January 2026
2-way bookshelf speaker
Featuring 6.5" Purifi woofer + 1.3” Purifi Aluminum Tweeter + 8" passive radiator(x2)

C8C – January 2026
3-way active cardioid bookshelf speaker
Featuring 8” Long Excursion Aluminum Subwoofer(x2) + 6" mid-woofer(x2) + 1“ Aluminum-Ceramic Tweeter

C8T – February 2026
3-way tower speaker
Featuring 8" paper woofer(x2) + 6" mid-woofer + 1“ Aluminum-Ceramic Tweeter

The AsciLab Facebook page has been updated. More information is available through our Facebook group.

Please find out more through the link below.

https://www.facebook.com/share/p/1G8gj82ZtU/

Thank you.