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Re: M100 max spl
AAAA #427408 12/11/17 09:10 AM
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Yeah. The level of foolproof design in Ians stuff is pretty valuable if they dont audibly quit at high output. Kudos!

Re: M100 max spl
Mojo #427410 12/11/17 02:17 PM
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Ian Offline
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Hi Mojo,

Did you mean "under" the white dust cap? smile


Ian Colquhoun
President & Chief Engineer
Re: M100 max spl
AAAA #427411 12/11/17 02:57 PM
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No, "in". The black dust cap was acting as a black body and hence absorbed all radiation falling on it causing the driver to exceed thermal limits. Now it's a white body reflecting all incident radiation and hence it's cooler.

Sorry to be giving away all your design secrets.:)


House of the Rising Sone
Out in the mid or far field
Dedicated mid-woofers are over-rated
Re: M100 max spl
AAAA #427422 12/11/17 09:49 PM
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Like water with ir?

You geek! I like it.

Re: M100 max spl
AAAA #427423 12/11/17 10:04 PM
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+2

Re: M100 max spl
AAAA #427433 12/11/17 11:15 PM
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Black Caps Matter!

Re: M100 max spl
AAAA #427435 12/12/17 12:03 AM
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smile


House of the Rising Sone
Out in the mid or far field
Dedicated mid-woofers are over-rated
Re: M100 max spl
AAAA #427436 12/12/17 01:51 AM
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Originally Posted By Serenity_Now
Like water with ir?

You geek! I like it.


Geez! Water is like a notch filter.

https://upload.wikimedia.org/wikipedia/c...iquid_water.png


House of the Rising Sone
Out in the mid or far field
Dedicated mid-woofers are over-rated
Re: M100 max spl
AAAA #427456 12/12/17 09:58 AM
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Band pass filter. Doesn't like Visible as much as UV and IR. Loves to gobble up invisible wavelengths. Yum!!

Neato eh?! Like fire conducting electricity (DC rectifier.) Nature is weird.

Re: M100 max spl
craigsub #427535 12/14/17 12:12 AM
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Originally Posted By craigsub
The max SPL of a speaker is a tough question to answer. Let's discuss this free space at one meter.

At 200 Hz and up, a single M100 will deliver 120 dB. As you go below 200 Hz, delivering high SPL becomes more difficult. But the triple 6.5's in an M100 should still do in excess of 110 dB at the 80 Hz crossover level.

What most don't understand is 110 dB will drive you from the room, and 120 dB will cause hearing damage fairly quickly.

Then add into the mix the room gain, and a pair of speakers, and I cannot imagine a scenario in a home in which a pair of M100's would not be able to generate 115 dB at the listening position from 80 Hz and up.

Back to "driving you from the room" ... in our blind tests here, I have run a 90 dB sine wave (measured from the listening position) and asked people to guess the SPL. It was so loud the lowest guess was 100 dB. The average guess was 107-108 dB.

Does this help answer the question?


What I don't understand then Craig, is why there are talks of developing the T-Rex speaker that, anecdotally, is being conceived to deliver 130 dB anechoicaly. This sounds like insanity!


House of the Rising Sone
Out in the mid or far field
Dedicated mid-woofers are over-rated
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