quote:Originally posted by chemid51: I AGREE ABOUT THE RENAMING OF THE STEET CLASSES, BUT I DO NOT AGREE WITH BOBBY ABOUT THE USE OF 3/8 INCH OF DYNAMAT. I THINK 1/8 INCH IS FINE.
1/8"=.125 DYNAMAT ORIGINAL IS .07 THICK DYNAMAT XTREME IS .044 THICK DYNASHIELD SPRAY THICKNESS IS RECOMMENDED AT .07 THICK EXTREMELINER IS .392 THICK
SO YOU COULD STILL USE TWO LAYERS OF DYNAMAT XTREME. YOU CAN'T USE EXTREMELINER
will i still be able to use 2 layers of brownbread in my girls trunk? its 1.6mm (63mil) thick
quote:Originally posted by 170typhoon: I dont understand the 4 ft2 rule for extreme... do you mean that there has to be 4ft2 from drivers door to passengers door? or 2 ft2 from drivers door to drivers side console, and the same for the passenger side, for a total of 4ft2? Maybe I am just not thinking about this in the right way. Someone please explain.
He is referring to vehicles with large consoles and/or roof build downs. In that situation the area left between the console and the roof needs to measure AT LEAST 4 sq ft when viewed from the side. To make my car work with this, I will have to go in and make the console smaller, which I dont mind doing, because this rule NEEDS to be there to keep the vehicles from becomeing completely compartmentalized from the passenger side to the drivers side.
quote:Originally posted by prophesized: whats the definition of a "discrete" voice coil
Agreed. please clarify the a "discrete" voice coil.
There are many DVC woofers that are actually quads. These woofers have either seriesed or paralleled a pair of voice coils together under the dust cap. the end result is that there are only 2 connection points to the woofer, instead of four.
are these woofers still legal for street???
-------------------- Andrew Harper
2002 STREET 3-4 6th Place World Finals 2003 Street B 2nd Place Spring Break Nationals Posts: 1702 | From: Vero Beach, FL | Registered: Jul 2001
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quote:Originally posted by 170typhoon: I dont understand the 4 ft2 rule for extreme... do you mean that there has to be 4ft2 from drivers door to passengers door? or 2 ft2 from drivers door to drivers side console, and the same for the passenger side, for a total of 4ft2? Maybe I am just not thinking about this in the right way. Someone please explain.
He is referring to vehicles with large consoles and/or roof build downs. In that situation the area left between the console and the roof needs to measure AT LEAST 4 sq ft when viewed from the side. To make my car work with this, I will have to go in and make the console smaller, which I dont mind doing, because this rule NEEDS to be there to keep the vehicles from becomeing completely compartmentalized from the passenger side to the drivers side.
Good call Wayne
nate, according to the preliminary rules, a person could have 4 sq ft between the console and the enclosure wall and then very little between console and roof.
We all know the intenet and the meaning, but some people will abuse it.
Look at Pure Sound or others. They have plenty of room to pass from passenger side to drivers side.
-------------------- See you in the lanes,
dBSteve Get Loud Productions LLC Posts: 8436 | From: Midwest | Registered: Aug 2000
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I think that I have said too much....................I must go now................the SPL Ninja's are upon me Need more power? UP YOURS!! with Excessive Amperage! Posts: 6070 | From: Northern California | Registered: Nov 1999
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quote:Originally posted by idbl_Fanatic: Subwoofers may not contain more than 2 discrete voice coils per sub.
Someone want to tell me what discrete voice coils are?
Taken from Dictionary.com....
discrete - 1.Constituting a separate thing. 2. Consisting of unconnected distinct parts. 3. Mathematics Defined for a finite or countable set of values; not continuous.
Not sure if that will help but thats what I found on discrete.
Luin
-------------------- -Luin Haden AKA "Lou Dog" 2000 Street 1-2 World Finalist Posts: 3058 | From: Nixa, MO | Registered: May 2000
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If I wire my quad in series and then in parallel would that be allowed?
Posts: 31 | From: Christchurch, New Zealand | Registered: Jan 2002
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posted
Each pair of binding posts (or terminals) on a woofer is connected to a discrete voice coil. The voice coil is electrically isolated from other discrete coils in the woofer.
Many woofers have multilayer voice coils. These coils are usually connected in parallel internally. If the woofer only has 1 pair of binding posts (or terminals), we would consider the woofer to have a single voice coil. If the woofer has two sets of binding posts (or terminals), we would consider the woofer to be a DVC. If the woofer has 4 sets of binding posts (or terminals), we would consider the woofer to be a Quad.
After more feedback I will try to address other areas that may be confusing.
Will also address the tint issue.
[ 01-19-2003, 09:54 PM: Message edited by: Wayne Harris ]
-------------------- "Keep it Loud and Make me Proud!"
posted
"· Passengers may not lean forward, backward, or to one side when demonstrating compliance with this rule.
· Passengers may not tilt their head forward, backward or to one side when demonstrating compliance with this rule.
· Passengers may not sit “cross-legged” when demonstrating compliance with this rule.
· While seated, the location of the passenger’s heels may not be higher than the location of the passenger’s seat. (The passenger’s heels must be lower than his butt.)"
Wayne,
Could we see a pic of someone that is in compliance of this new rule? Exspecialy in a smaller vechicle like an ex-1 or ex-2?
"nate, according to the preliminary rules, a person could have 4 sq ft between the console and the enclosure wall and then very little between console and roof.
We all know the intenet and the meaning, but some people will abuse it.
Look at Pure Sound or others. They have plenty of room to pass from passenger side to drivers side."
Good point dbSteve
-------------------- Mike and Mark Rip_Rock@shaw.ca
quote:Originally posted by 170typhoon: I dont understand the 4 ft2 rule for extreme... do you mean that there has to be 4ft2 from drivers door to passengers door? or 2 ft2 from drivers door to drivers side console, and the same for the passenger side, for a total of 4ft2? Maybe I am just not thinking about this in the right way. Someone please explain.
He is referring to vehicles with large consoles and/or roof build downs. In that situation the area left between the console and the roof needs to measure AT LEAST 4 sq ft when viewed from the side. To make my car work with this, I will have to go in and make the console smaller, which I dont mind doing, because this rule NEEDS to be there to keep the vehicles from becomeing completely compartmentalized from the passenger side to the drivers side.
Good call Wayne
nate, according to the preliminary rules, a person could have 4 sq ft between the console and the enclosure wall and then very little between console and roof.
We all know the intenet and the meaning, but some people will abuse it.
Look at Pure Sound or others. They have plenty of room to pass from passenger side to drivers side.
Not really Steve. This rule still will not change the fact that the console cant be higher than the dash, and the roof buildown can not block the windshield beyond its own 4 sq ft limit. Taking these other limits into account will limit the loopholes.
As far as other vehicles that are wide open, notice they are all larger, and specifically wider vehicles. Some things just aren't possible in a small vehicle without doing things a bit different.
posted
If a person has 1 15" woofer and 1 amp they could be in Street 1-2. If a person has 2 15" woofers and 2 amps they could be in S3-4. Do they have the option of being in SS1-2 or are they now stuck in the street class as per the new rule?
Posts: 5534 | From: CO | Registered: Apr 2001
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posted
With respect to the classification of woofers at being quad, DVC etc I believe that it should be based on how they are wired for the competition,
Basicly It should be based on the effective number of coils it has in the wiring configuration used in the competition.
This is consistent with the spirit of the rule,
For example a quad could be wired to have 2 discreet coils, ie pairs of coils wired in series and then the pair parralleled, to make it electrically a DVC. There is no difference from a quad wired as such and DVC version of the same sub from an electrical prospective, The quad would have no advantage in competition used in such a way over a DVC.
It would also make it easier on the competitors who compete in multiple organisations soundoffs, As they can change the subs effective number of coils according to the requirements.
I believe it is more a case of what the rule is intending to achieve rather than what it literally says.
-------------------- Technical Director E Audio ltd Erkel@eaudio.co.nz www.eaudio.co.nz Posts: 333 | From: New Zealand | Registered: Dec 2000
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posted
In my opinion, an usual Street car doesn't have more than about 1/8 - 1/6 inch of damping material necessery.
And I'm not sure, if a total thickness of more than that won't improve the score and that's the piont the damping material should NOT be used for!
Same thing in SuperStreet in the front of the door jambs: Wayne forgot (no attack on you ) any statement about the situation in SS - there must be an exactly definition about the thickness, too! (in my opinion same as in Street -> 1/8" - max. 1/6")!
Üüüühh!!! Matze
-------------------- 2002 2nd Place German Champion Street 1-2 2002 3rd Place Champion certified score in the world in Street 1-2 2003 2nd Place German Champion Street A (152.1 dB) 2004 2nd Place ESB Champion Street A 2004 German Champion Street A 2004 EXT 3000 + 2 x Atomic AP10 D1 = 151,2 dB 2005 2nd Place ESB Champion Street A 2005 German Champion Street A Official german cheesecake provider of Alma Gates Posts: 657 | From: Griesheim, Germany | Registered: Mar 2002
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posted
I don't like the 1/8" rule on mat type damping material, just as the most usual thickness people is using whenever using damping mat here is 5-6 mm. 1/6 or even 1/4" would be much better and fair.
I am afraid that if mat type is limited strictly to 1/8" then people are starting to find and use those very expensive sprayed-on stuff which can make it quite hard... Not to mention this is a very major rule change to last year and would make a lot of people to totally tear down their cars in Street and Super Street classes.
Oh, did we really got Extreme 1 official ?? I though my nagging was not heard
[ 01-20-2003, 04:42 AM: Message edited by: Jani U ]
Posts: 575 | From: Finland | Registered: Feb 2001
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posted
The 4sq.ft rule is basicly very good idea, but I think it´s little bit too much. I calculated that in many cases people can´t build center consoles in the dashboard level... could it be a little smaler? say about 3sq.ft for example?
edit: or mayby 3,5sq.ft?
[ 01-20-2003, 05:56 AM: Message edited by: Jarkko Vaara ]
quote:Originally posted by chemid51: I AGREE ABOUT THE RENAMING OF THE STEET CLASSES, BUT I DO NOT AGREE WITH BOBBY ABOUT THE USE OF 3/8 INCH OF DYNAMAT. I THINK 1/8 INCH IS FINE.
1/8"=.125 DYNAMAT ORIGINAL IS .07 THICK DYNAMAT XTREME IS .044 THICK DYNASHIELD SPRAY THICKNESS IS RECOMMENDED AT .07 THICK EXTREMELINER IS .392 THICK
SO YOU COULD STILL USE TWO LAYERS OF DYNAMAT XTREME. YOU CAN'T USE EXTREMELINER
will i still be able to use 2 layers of brownbread in my girls trunk? its 1.6mm (63mil) thick
1/8" = 3.175mm 1.6 x 2 = 3.2mm, are you sure its not 1.5mm thick.
-------------------- 4TH PLACE 2002 WORLD FINALS S 3-4 TEAM KRAZY 8'S EAST COAST 147.5dB 1973 VW BUG 2001 JEEP CHEROKEE Posts: 501 | From: Florida | Registered: Aug 2002
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