Hello,
I'm searching for the smallest Mms available for a 15' on the market.
Is there anything better than Jensen (53Gr) ?
I'm searching for the smallest Mms available for a 15' on the market.
Is there anything better than Jensen (53Gr) ?
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Using a driver with the lowest available Mms is not a good idea for a 15" subwoofer driver...
I will let you guess why that is. Hint: what must happen to make Mms smaller and smaller and smaller?
I will let you guess why that is. Hint: what must happen to make Mms smaller and smaller and smaller?
Yes you are right, but for my application (OB and a very restricted range) a light cone or a stiff mechanical damping is required.
Peavey 1508-8 HE BWX in ferrite and neodymium have ~53g mms
overhang only ~2mm - I would expect effective xmax to be better
the neodymium version (like mine) seems like it was discontinued a few years ago.
subjectively run wide open, it seemed a bit more mellow than say an EV15B
what is your goal with the low mms ?
Thiele-Small Parameters
Resonant Frequency (Fs)51.2 Hz
DC Resistance (Re)5.32 ohms
Voice Coil Inductance (Le)0.34 mH
Mechanical Q (Qms)10.6
Electromagnetic Q (Qes)0.35
Total Q (Qts)0.34
Compliance Equivalent Volume (Vas)6.44 ft.³
Mechanical Compliance of Suspension (Cms)0.18 mm/N
BL Product (BL)16.04 Tm
Diaphragm Mass Inc. Airload (Mms)52.9g
Maximum Linear Excursion (Xmax)1.9 mm
overhang only ~2mm - I would expect effective xmax to be better
the neodymium version (like mine) seems like it was discontinued a few years ago.
subjectively run wide open, it seemed a bit more mellow than say an EV15B
what is your goal with the low mms ?
Thiele-Small Parameters
Resonant Frequency (Fs)51.2 Hz
DC Resistance (Re)5.32 ohms
Voice Coil Inductance (Le)0.34 mH
Mechanical Q (Qms)10.6
Electromagnetic Q (Qes)0.35
Total Q (Qts)0.34
Compliance Equivalent Volume (Vas)6.44 ft.³
Mechanical Compliance of Suspension (Cms)0.18 mm/N
BL Product (BL)16.04 Tm
Diaphragm Mass Inc. Airload (Mms)52.9g
Maximum Linear Excursion (Xmax)1.9 mm
Great (but discontinued), i've performed some tests with a guitar loudspeaker array (i don't matter about the fact "that it is not in the hifi marketing range" since the room resonances are by far the worst thing to face).
It works well but i want to replace the array by only one loudspeaker.
Yes, you are right, but i'm chasing a low FR with a QTS<0.75 and a light membrane in order to reduce the radiation energy pattern at the maximum on a very specific room mode.
Because that i've found (in an equalization session) that a multi sub configuration that exploiting each room mode is better, i use closed boxes and dipolar loudspeakers.
There is a multi sub configuration in my room that can partially contourn the room resonances problem and obtain a great CSD graph without any treatement or equalization.
Low Mms is useful but better still is low Mms + High BL. If you've got a stronger motor you can move a slightly higher Mms as if it were just as light. Recently I've been dividing Mms by Bl, but I don't know if that's a reasonable thing to do.
So the Peavey would be 52.9/16.04 = 3.298
And this Faital would be 56/17.5 = 3.257
FaitalPRO | LF Loudspeakers | 12FH500
In any case it's at least comparable. (Edit: Er.. if it wasn't for the fact it's a 12", oops)
In any case if you were willing to entertain the idea of a 12" your options would open up considerably.
This Beyma 12" has a very low Qts (0.15) and 25.3 BL. Mms is 67g but if there's any validity whatsoever to my rule of thumb calculation that comes to 2.648.
LOW & MID FREQUENCY 12P80Nd/V2 | Beyma
So the Peavey would be 52.9/16.04 = 3.298
And this Faital would be 56/17.5 = 3.257
FaitalPRO | LF Loudspeakers | 12FH500
In any case it's at least comparable. (Edit: Er.. if it wasn't for the fact it's a 12", oops)
In any case if you were willing to entertain the idea of a 12" your options would open up considerably.
This Beyma 12" has a very low Qts (0.15) and 25.3 BL. Mms is 67g but if there's any validity whatsoever to my rule of thumb calculation that comes to 2.648.
LOW & MID FREQUENCY 12P80Nd/V2 | Beyma
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My cab is already dilled for a 18' and i have an adaptor for a 15', i've already tested a 12' and my (very) high Mms 18' sound cleaner.
I'm confident into reliable manufacturers expertise and i don't know what are the mecanical requirements for a cone to sound right.
As Freddi's said the cones seems to go flabby under a 60Gr of Mms (for a 15) and in the 55-80Hz range, i'm afraid of the signal tracking.
There are no loudspeakers able to track a complex LF audio signal and a high Mms can't be controlled only by its mecanical suspension, too stiff there is a lack of dynamics and too loose there is no control.
There are a lot of reliable manufactuers that produce good cheap 15' woofers with a Mms of 60-80Gr... it seems to be the range for a good signal tracking in the "high lows" IMHO
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vintage EV18B had farily low moving mass. At this point finding them in nice shape might be a problem. I remember seeing one bottom out in a bass reflex about 40 years ago. It seems pretty well controlled in my little Karlson-type
18 inch two way Karlson speaker playing soprano voice and harp - YouTube
Eminence has made 18s with mms ~103g and qts ~0.25
there was a discussion a few years back on low mass 18 inch speakers
Lowest mass 18"s in production -?
18 inch two way Karlson speaker playing soprano voice and harp - YouTube
Eminence has made 18s with mms ~103g and qts ~0.25
there was a discussion a few years back on low mass 18 inch speakers
Lowest mass 18"s in production -?
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These transducers have a very low Xmax, i need a low priced (50-80) light cone with a good Xmax and a relatively low Q 😀
In Europe there is only Eminence, Celestion, Fane and Tymphany.
In Europe there is only Eminence, Celestion, Fane and Tymphany.
An externally hosted image should be here but it was not working when we last tested it.
These usually have a total mass of 45g.
That's for the whole bag though, not each.
A steep notch filter in the bass region, kills the bass (my experience). Multiple woofers or OB is better imo.
Not bad at all, but expensive (270€).
Both are fabricated in the USA and the Eminence loudspeakers drivers with equivalent parameters are half of the JBL price.
I don't eat them anymore since they are full nanoparticles (titanium dioxide)
... in order to have bright colors.
Theses things has been created to cheer american soldiers during the Second World War, now it kill the children.
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But the nanoparticles are the best bit!
I wonder what the LD50 is for M&Ms in children.
I wonder what the LD50 is for M&Ms in children.
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I've performed a long measurements session, when you trigger a room mode (location and radiation) it rings whatever you do
The OB solution better than BR and closed but only on some registers not all.
I don't know if the accumulation of nanoparticles in our organs is dangerous... i prefer to see the effect on the others before making a statement.
Perhaps the brown ones are nanoparticles free ?
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