• Welcome to ASR. There are many reviews of audio hardware and expert members to help answer your questions. Click here to have your audio equipment measured for free!

Floor Speakers M10 BF Nautilus Like Tear Down

daniboun

Major Contributor
Forum Donor
Joined
May 2, 2020
Messages
2,697
Likes
4,108
Location
France (Lyon)
Hi Amigos,

I was lucky enough to get my hands on a pair M10 BF Nautilus, It looks very much like the Nautilus BW: not to say it's a copy. That being said, I just wanted to share this experience for purely communicative purposes. For those who know me, I love testing and taking apart everything I can get my hands on ))))
First and foremost, what's impressive here is the quality of the cabinets; they're enormous and made of high-density 30mm MDF with a double internal reinforcement (bracing). The speakers weigh over 120 kg for a pair, with dimensions of 410 x 550 x 1050 mm. Let's be honest, they are imposing in a medium-sized living room...
They are available in 3 colors: Walnut, Cherry, and matte white. In my living room, I naturally opted for white ones, given my decor at the time.
I wouldn't talk about measurements because I haven't had time to do any, but I did perform an update of the Crossover without any particular expectations, but rather, let's say, to give them a little more dignity.

These are 3-way speakers composed of a silk dome tweeter, a 6.5" Kevlar midrange driver, and two 10" carbon fiber cone woofers. They also feature a dual down-firing port with a counter base. They are also available with an aluminum tweeter. The counter base is 5 cm thick plinth made of solid MDF, makes the speakers very stable and free from resonances with the floor.
At the time I was driving them with a Topping LA90 with a Gustard X16 DAC. I have fond memories of listening to them; they sounded quite good with fairly controlled bass, and I think I can say they go pretty low with those dual woofer.

The mid-woofer reproduces the most important range of the sound message, the one that goes from 200 Hz to 3 kHz. The global frequency range starts @32 hz to 22 kHz, : up to 200 Hz for the two 10” woofers, 200 – 3 kHz for the 6.5” mid-woofer and 3Khz – 22 kHz for the tweeter. They are wired in bi-amp mode with a very good quality speaker terminal (banana type), by the way!
I've completely redesigned the crossover, but without changing the core values. From what I understand, there's an old and a new version of the crossover; this is the improved version, and therefore the latest version.


GLOBAL SPEC :

Frequency range 32Hz– 22 kHz
Impedance : 4 Ohm (min. 3,5)
Sensitivity : 91 dB
Size: 410 x 550 x 1050 mm
Weight : 120KG / Pair
Max RMS Power : 300W


1772794973433.png

1772795062000.png

1772795087030.png

1772795162311.png

1772795123214.png

1772795556758.png

1772795277004.png

1772795212349.png

1772795332716.png

1772795369387.png

1772795403268.png

1772795433601.png


1772795473614.png
 

Attachments

  • 1772795003458.png
    1772795003458.png
    1.6 MB · Views: 53
Only the finest hand-carved circuit boards. It's cheaper to order them online, so I guess just appreciate the commitment?
 
I am curious as to how much these cost, and what they have in common with the aforementioned B&Ws?
I would imagine shipping costs would be very high and therefore possibly prohibitive, if you are outside China.
Thanks.
 
I am curious as to how much these cost, and what they have in common with the aforementioned B&Ws?
I would imagine shipping costs would be very high and therefore possibly prohibitive, if you are outside China.
Thanks.

Personally, I know a European importer who only charges €100 for shipping a 120kg pair... not really prohibitive.
 
Only the finest hand-carved circuit boards. It's cheaper to order them online, so I guess just appreciate the commitment?

I think the Chinese are excellent when it comes to speaker cabinetmaking. Here you can see they've focused their efforts on this aspect. If we were to reproduce these cabinets here in Europe, we'd have to spend close to €2,000 just for the basic woodwork...
 
looks very much like the Nautilus BW
You are always very critical of many other posts and reports. It would be good if you applied your own standards to your own posts as well.

There are no measurements, no really helpful information about the product, no sources of supply, no prices—actually, no interesting information at all, except that you have speakers in your living room that look similar to Bowers & Wilkins speakers.
 
Hi Amigos,

I was lucky enough to get my hands on a pair M10 BF Nautilus, It looks very much like the Nautilus BW: not to say it's a copy. That being said, I just wanted to share this experience for purely communicative purposes. For those who know me, I love testing and taking apart everything I can get my hands on ))))
First and foremost, what's impressive here is the quality of the cabinets; they're enormous and made of high-density 30mm MDF with a double internal reinforcement (bracing). The speakers weigh over 120 kg for a pair, with dimensions of 410 x 550 x 1050 mm. Let's be honest, they are imposing in a medium-sized living room...
They are available in 3 colors: Walnut, Cherry, and matte white. In my living room, I naturally opted for white ones, given my decor at the time.
I wouldn't talk about measurements because I haven't had time to do any, but I did perform an update of the Crossover without any particular expectations, but rather, let's say, to give them a little more dignity.

These are 3-way speakers composed of a silk dome tweeter, a 6.5" Kevlar midrange driver, and two 10" carbon fiber cone woofers. They also feature a dual down-firing port with a counter base. They are also available with an aluminum tweeter. The counter base is 5 cm thick plinth made of solid MDF, makes the speakers very stable and free from resonances with the floor.
At the time I was driving them with a Topping LA90 with a Gustard X16 DAC. I have fond memories of listening to them; they sounded quite good with fairly controlled bass, and I think I can say they go pretty low with those dual woofer.

The mid-woofer reproduces the most important range of the sound message, the one that goes from 200 Hz to 3 kHz. The global frequency range starts @32 hz to 22 kHz, : up to 200 Hz for the two 10” woofers, 200 – 3 kHz for the 6.5” mid-woofer and 3Khz – 22 kHz for the tweeter. They are wired in bi-amp mode with a very good quality speaker terminal (banana type), by the way!
I've completely redesigned the crossover, but without changing the core values. From what I understand, there's an old and a new version of the crossover; this is the improved version, and therefore the latest version.


GLOBAL SPEC :

Frequency range 32Hz– 22 kHz
Impedance : 4 Ohm (min. 3,5)
Sensitivity : 91 dB
Size: 410 x 550 x 1050 mm
Weight : 120KG / Pair
Max RMS Power : 300W


View attachment 515548
View attachment 515550
View attachment 515552
View attachment 515554
View attachment 515553
View attachment 515565
View attachment 515556
View attachment 515555
View attachment 515557
View attachment 515559
View attachment 515560
View attachment 515561

View attachment 515564
Thank you, @daniboun, nice XO (not 1st order.... although, for 1st order, a complete XO rebuild is required, probablely not so simple, especially as the T/S Driver parameters would be needed to do so, wouldn't they, possablely unobtainium or not accurate?), no measure, but to ask, what are your impressions, in your System/Setup, to other speakers that you have built/made? Do you still have and listen to them?
 
Last edited:
You are always very critical of many other posts and reports. It would be good if you applied your own standards to your own posts as well.

There are no measurements, no really helpful information about the product, no sources of supply, no prices—actually, no interesting information at all, except that you have speakers in your living room that look similar to Bowers & Wilkins speakers.

Thanks for your critical thinking. If you find my post uninteresting, why are you reading it? What have you produced for ASR members?
 
Thank you, @daniboun, nice XO (not 1st order.... although, for 1st order, a complete XO rebuild is required, probablely not so simple, especially as the T/S Driver parameters would be needed to do so, wouldn't they, possablely unobtainium or not accurate?), no measure, but to ask, what are your impressions, in your System/Setup, to other speakers that you have built/made? Do you still have and listen to them?

I don't know to what extent it would be possible to integrate a completely new first-order crossover... I didn't keep them long enough because they were really too bulky for my space... They had a fairly pronounced flatness to the sound but excellent imaging. What was quite remarkable was the midrange; the vocals came through very well. But I definitely still prefer 2.1 setups, especially regarding bass reproduction.
 
Unfortunately we can't really learn much from this thread up until now, other than that their appearance is similar to some B&Ws, weight, driver/crossover configuration. Plus your subjective take on the sound. It would be useful to know how much they cost, as this is obviously a significant factor in their value/quality.
However, your description of their sound and the fact that you sold them on doesn't really say much for their quality imo.
 
Last edited:
If you find my post uninteresting, why are you reading it?
The familiar problem: you have to read something first to know whether it is good or bad.
 
The familiar problem: you have to read something first to know whether it is good or bad.

I wasn't expecting anything from you, but I'm still disappointed.-)
 
Unfortunately we can't really learn much from this thread up until now, other than that their appearance is similar to some B&Ws, weight, driver/crossover configuration. Plus your subjective take on the sound. It would be useful to know how much they cost, as this is obviously a significant factor in their value/quality.
However, your description of their sound and the fact that you sold them on doesn't really say much for their quality imo.

You can get the pair for about 1500€
Will share a link with details. I seem to remember seeing a thread on an audio forum where someone was posting measurements, but I can't find it anymore... I'll take a look tomorrow
 
I don't know to what extent it would be possible to integrate a completely new first-order crossover... I didn't keep them long enough because they were really too bulky for my space... They had a fairly pronounced flatness to the sound but excellent imaging. What was quite remarkable was the midrange; the vocals came through very well. But I definitely still prefer 2.1 setups, especially regarding bass reproduction.
Thank you, @daniboun, Ah Yes, found this FR graph for them which seems to be sufficiently accurate, especially for your Description/Impressions....
  • The Lower Bass roll off begins at 50Hz, doesn't it, which I was expecting to begin at 35-40Hz (especially with 2x 10"/25cm), with a little 3-4dB hump/bump at about 35-37Hz (my expectation but not so). This implys that 1 or 2 sub woofers might be necessary (as you have mentioned) to fill the very low Bass, doesn't it? I was also expecting the SPL to be about 90-91dB (my expectation but not so). Nominal 4R Impedance (min impedance >3.2 ohms), so at least a 100W/8ohms Amplifyer is required, isn't it?
  • Looking at the XO diagram suggests that the Woofers (2x 10"/25cm) are a weakness, doesn't it, only 88/89dB SPL and their Fs appears to be about 50/60Hz, combined with a low Qts of perhaps 0.20/0.25/0.30, and (an accordingly) low VAS?
1773253818567.png
 
Last edited:
Thank you, @daniboun, Ah Yes, found this FR graph for them which seems to be sufficiently accurate, especially for your Description/Impressions....
  • The Lower Bass roll off begins at 50Hz, doesn't it, which I was expecting to begin at 35-40Hz (especially with 2x 10"), with a little 3-4dB hump/bump at about 35-37Hz (my expectation but not so). This implys that 1 or 2 sub woofers might be necessary (as you have mentioned) to fill the very low Bass, doesn't it? I was also expecting the SPL to be about 90-91dB (my expectation but not so). Nominal 4R Impedance, so at least a 100W/8ohms Amplifyer is required, isn't it?
View attachment 516927

Indeed, they're not bass monsters, but they are very linear. Adding a subwoofer is highly recommended for reinforcement and better immersion. The problem is that they're already quite large, and if you have to clutter your space with a subwoofer... you'd better have a pretty big living room! I was driving them quite comfortably with a Topping LA90 and I also had a Topping PA5 Plus. Frankly, in my 30m² room at that time, it worked very well at 50% volume.
 
Thank you, @daniboun, Ah Yes, found this FR graph for them which seems to be sufficiently accurate, especially for your Description/Impressions....
  • The Lower Bass roll off begins at 50Hz, doesn't it, which I was expecting to begin at 35-40Hz (especially with 2x 10"/25cm), with a little 3-4dB hump/bump at about 35-37Hz (my expectation but not so). This implys that 1 or 2 sub woofers might be necessary (as you have mentioned) to fill the very low Bass, doesn't it? I was also expecting the SPL to be about 90-91dB (my expectation but not so). Nominal 4R Impedance (min impedance >3.2 ohms), so at least a 100W/8ohms Amplifyer is required, isn't it?
  • Looking at the XO diagram suggests that the Woofers (2x 10"/25cm) are a weakness, doesn't it, only 88/89dB SPL and their Fs appears to be about 50/60Hz, combined with a low Fts of perhaps 0.20/0.25/0.30, and (an accordingly) low VAS?
View attachment 516927

Seems that the 5th gen. have now a new crossover. I don t have the spec...
Also added Woofer / Mid / Tweeter parameter curves
 

Attachments

  • Capture+_2026-03-11-21-09-53.png
    Capture+_2026-03-11-21-09-53.png
    2 MB · Views: 62
  • Capture+_2026-03-11-21-19-24.png
    Capture+_2026-03-11-21-19-24.png
    351.4 KB · Views: 79
  • Capture+_2026-03-11-21-22-47.png
    Capture+_2026-03-11-21-22-47.png
    335.9 KB · Views: 65
  • Capture+_2026-03-11-21-19-59.png
    Capture+_2026-03-11-21-19-59.png
    305.6 KB · Views: 68
Last edited:
Thanks for your critical thinking. If you find my post uninteresting, why are you reading it? What have you produced for ASR members?
This seems like a weak defense to a legitimate criticism. We're on a forum to read and express our thoughts, and everyone has their own.
Personally, I don't see the point in this discussion either, as with other discussions about blatant copies of well-known models from elite brands, and I always find that advertising and giving visibility to these imitations is not good practice.
This is obviously my personal opinion; as long as it doesn't violate the rules, everyone is free to post whatever they want.
 
Back
Top Bottom