CGN Audio Labs
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Black_Jesus
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Black_Jesus
10+ year member
The Unexpected
- Thread Starter
- #2
here is how it all started:
him:I like the EVX-180B for midbass, but I really like the CGN Audio Labs drivers the best. Over 3" of excursion, the most linear long-throw woofer on the market, neodymium magnets for higher efficiency and absurdly low distortion. Real great in the 10-25Hz range.
me: dat sht aint bad at all...
hmm wonder what they would do in a car... see my posting signature to see what im talking about //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif lol
him:You do realize that a car interior is tiny and acts as a horn-loading system for speakers. That way even small speakers can achieve some incredible SPL figures. I think something like this in a car would be impractical. All the glass would blow out. These are not toys.
David Lee at BassMaxx informs me that the latest version of the CGN-1808 is producing 152dB in an anechoic test chamber, according to the lab that determines the Thiele-Small parameters.
Conventional 18" woofers produce about 122dB SPL under these conditions. Of course in a car, that would be about 150dB.
Car subwoofers are extraordinarily inefficient due to the large gap tolerances they must have to accept the abuse they get and achieve the high power ratings that marketing wants. It's a numbers game, and big numbers of watts sell, since kids think a 6,000W woofer is going to be louder than a 600 watt woofer. But when the 6,000W woofer is only 89dB/1W/1M and the 600W woofer is 97dB/1W/1M, the difference in power rating becomes moot.
It's all about moving air with the least distortion. The CGN drivers are unique in that they have the voice coil in the magnetic field for the entire travel of excursion. Most drivers have the field covering a 1/4" area of the pole piece. Outside of that the cone is coasting. It produces bass, but go beyond 1/4" and distortion rises dramatically. Some say it sounds louder because of the distortion, but that's not real bass. Now when you get 3" of excursion while IN the magnetic field, distortion is only 0.4% @ 30Hz and it is a totally different experience. You can't break windows with distortion, but when you have a pure tone at these frequencies, damage to buildings results. And it feels and sounds great!
me: do a google search on XBL^2 its made by adire audio, but resonant engineering's XXX (the woofer i use) uses this technology. some pretty cool shit. does pretty much what your talking about. very very low distortion.
and unless there is some flaws in the glass, 150, 160 wouldnt break it, you have to get above 170dB to be able to smash good glass every time //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif
him:I would estimate that a CGN driver would top 180dB (in the positive direction only, since 176dB in the negative direction is absolute vacuum) in an automobile interior, due to the horn loading effect of the small space. Car interiors add about 28dB to the SPL of drivers operating in halfspace.
If the frequency is low, the glass would simply pop out of the rubber seal on the first positive half cycle.
If a driver can do damage to concrete, you can pretty much bet an auto interior would be harmed.
me: world record is 179dB in SPL competitions...
so your telling me this "cgn driver" would be able to top 180dB?
compared to guys running over 150kW to 30-40 woofers?
him:Absolutely, because it can do 152dB in halfspace, so figuring that a car interior adds 28dB, the result is ~ 180dB, and that would be low distortion output, not heavily distorted "competition mode" noise.
I'm already getting more output from two of these than from 14 conventional 18" woofers. They seem as if their output is limitless. During testing, I was fearful that the ceiling would fall on me, not to mention the nausea it brought on.
him:I like the EVX-180B for midbass, but I really like the CGN Audio Labs drivers the best. Over 3" of excursion, the most linear long-throw woofer on the market, neodymium magnets for higher efficiency and absurdly low distortion. Real great in the 10-25Hz range.
me: dat sht aint bad at all...
hmm wonder what they would do in a car... see my posting signature to see what im talking about //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif lol
him:You do realize that a car interior is tiny and acts as a horn-loading system for speakers. That way even small speakers can achieve some incredible SPL figures. I think something like this in a car would be impractical. All the glass would blow out. These are not toys.
David Lee at BassMaxx informs me that the latest version of the CGN-1808 is producing 152dB in an anechoic test chamber, according to the lab that determines the Thiele-Small parameters.
Conventional 18" woofers produce about 122dB SPL under these conditions. Of course in a car, that would be about 150dB.
Car subwoofers are extraordinarily inefficient due to the large gap tolerances they must have to accept the abuse they get and achieve the high power ratings that marketing wants. It's a numbers game, and big numbers of watts sell, since kids think a 6,000W woofer is going to be louder than a 600 watt woofer. But when the 6,000W woofer is only 89dB/1W/1M and the 600W woofer is 97dB/1W/1M, the difference in power rating becomes moot.
It's all about moving air with the least distortion. The CGN drivers are unique in that they have the voice coil in the magnetic field for the entire travel of excursion. Most drivers have the field covering a 1/4" area of the pole piece. Outside of that the cone is coasting. It produces bass, but go beyond 1/4" and distortion rises dramatically. Some say it sounds louder because of the distortion, but that's not real bass. Now when you get 3" of excursion while IN the magnetic field, distortion is only 0.4% @ 30Hz and it is a totally different experience. You can't break windows with distortion, but when you have a pure tone at these frequencies, damage to buildings results. And it feels and sounds great!
me: do a google search on XBL^2 its made by adire audio, but resonant engineering's XXX (the woofer i use) uses this technology. some pretty cool shit. does pretty much what your talking about. very very low distortion.
and unless there is some flaws in the glass, 150, 160 wouldnt break it, you have to get above 170dB to be able to smash good glass every time //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif
him:I would estimate that a CGN driver would top 180dB (in the positive direction only, since 176dB in the negative direction is absolute vacuum) in an automobile interior, due to the horn loading effect of the small space. Car interiors add about 28dB to the SPL of drivers operating in halfspace.
If the frequency is low, the glass would simply pop out of the rubber seal on the first positive half cycle.
If a driver can do damage to concrete, you can pretty much bet an auto interior would be harmed.
me: world record is 179dB in SPL competitions...
so your telling me this "cgn driver" would be able to top 180dB?
compared to guys running over 150kW to 30-40 woofers?
him:Absolutely, because it can do 152dB in halfspace, so figuring that a car interior adds 28dB, the result is ~ 180dB, and that would be low distortion output, not heavily distorted "competition mode" noise.
I'm already getting more output from two of these than from 14 conventional 18" woofers. They seem as if their output is limitless. During testing, I was fearful that the ceiling would fall on me, not to mention the nausea it brought on.
bigbassman
Premium Member
Master of all things loud
from that picture.. looks like a TC sounds design that's been around for a couple years..
was brought back into use by the neo shocker sig..
nothing exactly new there IMO...
here's a few pics I have from the older TC drivers.. from 2004
Loyd L.
was brought back into use by the neo shocker sig..
nothing exactly new there IMO...
here's a few pics I have from the older TC drivers.. from 2004
Loyd L.
DBfan187
5,000+ posts
Supa's mom was here!
look like light bulbs
OP
Black_Jesus
10+ year member
The Unexpected
- Thread Starter
- #5
very interesting loyd, keep it comin //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif
OP
Black_Jesus
10+ year member
The Unexpected
- Thread Starter
- #6
should have expected that from you dbfan... lmao
JimJ
5,000+ posts
Tangled Up in Blue
Generalizations FTW!!11
The guy obviously has no experience with the real world - high SPL automotive installs don't just happen //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif I know next to nothing about making things loud...and even I know that //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif
bigbassman
Premium Member
Master of all things loud
I wish I knew how to get loud.. //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif
Loyd L.
Loyd L.
JimJ
5,000+ posts
Tangled Up in Blue
Psshhh.
//content.invisioncic.com/y282845/emoticons/tongue.gif.6130eb82179565f6db8d26d6001dcd24.gif
bigbassman
Premium Member
Master of all things loud
I built my grand prix with a wall of 18, then 16, then 15, then back to 16 8's...
powered with either an IA 20.1, or Autotek mm4000.1, depending on my mood..
Loyd L.
bigbassman
Premium Member
Master of all things loud
you still got that bigarsed white van ? //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif
Loyd L.
Johnny Drama
5,000+ posts
Banned
He will never ditch the tricked out tulip.
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