Adi777
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What frequency response, extension, descent can such subwoofers - 4 pieces?
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15-18" Powered Subwoofer Pair Build
- Thread starter concorde1
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To spec subwoofer(s) for any application you need to decide how low, how loud and at what distance. For multiple listening positions multiple subwoofers can create lower mean spatial variation between positions when each can be individually controlled for level, delay and EQ.
In professional drivers there is really nothing better than BMS, but B&C, 18 Sound, Faital Pro, Beyma etc. all produce very well made drivers. There are Klippel results floating around for B&C and 18 Sound that show the motors are about as linear as can be made over quite high excursions and can take huge amplifier powers.
Most professional drivers are designed differently to hifi drivers in that they are all about getting as much motor force as possible. This gives then low Qts and a rising response. They are intended to be equalised and hit with all the power they can handle.
In professional drivers there is really nothing better than BMS, but B&C, 18 Sound, Faital Pro, Beyma etc. all produce very well made drivers. There are Klippel results floating around for B&C and 18 Sound that show the motors are about as linear as can be made over quite high excursions and can take huge amplifier powers.
Most professional drivers are designed differently to hifi drivers in that they are all about getting as much motor force as possible. This gives then low Qts and a rising response. They are intended to be equalised and hit with all the power they can handle.
Adi777
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I am thinking about the BMS 18N862. No housing size limit. I just need to find someone to make them for me.
What do you think about such woofers?
Home | Fi Car Audio
Fi Car Audio. Custom American Made Subwoofers. From 180+ dB SPL monsters to award winning SQ subs. All built in-house in Las Vegas, Nevada USA
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A quick simulation of the BMS vs Fi HT-3, on a 100L box, both reaching xmax at 5Hz:
- BMS - 19mm xmax : 800 W to reach xmax at 5Hz
- HT-3 - 34mm xmax : 2700 W to reach xmax at 5Hz
Also note that the HT-3 probably has much more inductance, thus to have an accurate simulation you would have to use Hornresp with the complex Le option.
In practice, the HT-3 won't be as linear as showed bellow (as WinISD doesn't use Le for calculating the simulation):
With the above caveat, a quick simulation using WinISD:
Given that you said you wanted to use 18" drivers for the mains, and this would primarily be a cinema setup, the HT-3 seems to be a better option, as it will be able to dig deeper than the BMS.
If you had smaller mains, the BMS would be a better option, as it would allow you to use a higher XO (i have 2 BMS on 125L boxes, and have use it up to 200Hz).
Also note that you will need a much beefier amplifier if using the HT-3, as you'll need around 2700W to take advantage of its long xmax.
- BMS - 19mm xmax : 800 W to reach xmax at 5Hz
- HT-3 - 34mm xmax : 2700 W to reach xmax at 5Hz
Also note that the HT-3 probably has much more inductance, thus to have an accurate simulation you would have to use Hornresp with the complex Le option.
In practice, the HT-3 won't be as linear as showed bellow (as WinISD doesn't use Le for calculating the simulation):
With the above caveat, a quick simulation using WinISD:
Given that you said you wanted to use 18" drivers for the mains, and this would primarily be a cinema setup, the HT-3 seems to be a better option, as it will be able to dig deeper than the BMS.
If you had smaller mains, the BMS would be a better option, as it would allow you to use a higher XO (i have 2 BMS on 125L boxes, and have use it up to 200Hz).
Also note that you will need a much beefier amplifier if using the HT-3, as you'll need around 2700W to take advantage of its long xmax.
Adi777
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Is this their best woofer?
azzy_mazzy
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i think they stopped making that woofer
Its the only long throw subwoofer (< 30mm xmax) available in Europe.
You could import from the USA, but it would be much more expensive due to weight, shipping and taxes.
And as i mentioned, it may be your best option, due to the fact that you are considering having the BMS 18N862 on your mains, i.e., you will have lots of midbass from then.
As such, your subs will only need to cover the sub-sonic frequencies, and in that regard, the HT-3 will have more extension (3-4db) bellow 30Hz than the BMS.
Adi777
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Actually, these 4 subwoofers that I want to have in a cinema room would be with different speakers. I am thinking of the JBL M2 as LCR but I don't know if I will get it. If not, it's probably 708p or SCL-2 as LCR.
They look great but with such large magnetic force I can’t see how they are suitable for sub frequencies. Try a simple simulation to see.I am thinking about the BMS 18N862. No housing size limit. I just need to find someone to make them for me.
What do you think about such woofers?
Home | Fi Car Audio
Fi Car Audio. Custom American Made Subwoofers. From 180+ dB SPL monsters to award winning SQ subs. All built in-house in Las Vegas, Nevada USA
azzy_mazzy
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all great speakers, the SCL-6 also measures well if you want to save some money
If you want to consider another custom / hand-made woofer fabricator on the eastern US, I suggest browsing to near Charlotte, NC "Stereo Integrity" -> https://stereointegrity.com/product-category/subwoofers/
With either SI or FI, you are stepping into "deadly serious" territory you are not likely to find outside of custom. Stay safe, stay COOL!
With either SI or FI, you are stepping into "deadly serious" territory you are not likely to find outside of custom. Stay safe, stay COOL!
2x SQL-12 in a 40 litre vented box will give you an f3 around 25Hz and they will generate almost 110Hz at 20Hz at Xmax.
Great combo
I have 4x Bms 18N862 in sealed 115L.
2x over LR and 2x in The back wall.
Also 2x B&c 21ds115 in large ported boxed 15hz tune
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I think the OP and Adi777 are from Europe, thus the interest in PRO drivers, and the Fi HT-3.
Importing from the USA would be cost prohibitive, due to weight, shipping and taxes.
A few years ago, it was also possible to get the Aura Sound NS18-992-4A 18" in Europe at Quint Audio, but they are no longer active.
So its either pro drivers, or the Fi HT-1/HT-3 from UK.
6.5m x 4.5m x 2.3m
L x W x H
My system is capable of big spl numbers, But it also sounds very very good
