Canadian SPL League 2005 Rookie class rules: 3rd draft
01-15-2005, 10:03 AM
#21
Hey I think that it looks good so far, I can see that people are really putting some time and effort into this and let me be the first one to say thank you for stepping up to the plate to help revive a dying sport. I really like the idea of limiting fuse size and channels of amplification. It makes people really take efficency into account when looking for amplifiers, and I think that it will also make people try things that they would not normally do. I know that if I were going to compete in the rookie classes I would find myself an amp that made all of its power at 4 ohm instead of having to load it down, because the more you load an amp down the more efficency you lose. ( in most cases) The idea of having no limit on the amount of capacitance I dont feel is a good thing and here is why. When dealing with caps I have found that having one or two will hinder the performance of a system, the cap(s) will discharge before the mic has picked up a reading and the electrical system now has to play catch up for the rest of the run. This now takes power away from the amplifier(s), and if some one wants to do that be my guest. Now take a Batcap for example, they actually rate them in farads so they are considered a capacitor but they have an amp hour rating. For those of you who dont know what I am getting at, your typical cap will discharge in miliseconds then needs to refill so to speak, but the batcap will actually store energy and release it at a certain rate over an hours time. So essentially it is a battery but rated in farads instead of amperes. So I think you can either limit capacitance or just ban the use of batcaps in these classes. If someone wants to go out and buy a few hundred 1 farad caps and wire them all up just to gain a few tenths then so be it!!! Just my $0.02
[ January 15, 2005, 11:06 AM: Message edited by: orion ]
[ January 15, 2005, 11:06 AM: Message edited by: orion ]
01-15-2005, 10:40 AM
#22
1000 Watt CAFz'r
Join Date: Mar 2004
Posts: 1,093
Originally posted by MB:
its very easy to change the number on a ANL fuse .... a little nailpolish remover and marker.
its very easy to change the number on a ANL fuse .... a little nailpolish remover and marker.
instead of thinkiong of ways to cheat, use your knowledge and find ways of being loud and winning within the rules....
Livin Loud
01-15-2005, 10:55 AM
#23
500 Watt CAFz'r
Join Date: Dec 2003
Posts: 541
i like the way things are looking i am using 4 b/c i havent changed the stock battery or alt but sometime i will then i move a couple caps to the other amps. But also my box is designed to fit into a certain space so it is really tall so again i dont fit into your rookie class. but oh well.
01-15-2005, 11:22 AM
#25
500 Watt CAFz'r
Join Date: Dec 2003
Posts: 541
no we are just finishing designing it so we arent sure yet on it finished height. but right now it looks like it will be 36"H x 20"L x 19"W tuned to 31hz but things could change just depends and no i dont have pics b/c it is still in bassbox as a graph right now
[ January 15, 2005, 12:23 PM: Message edited by: trk2loud ]
[ January 15, 2005, 12:23 PM: Message edited by: trk2loud ]
01-15-2005, 11:28 AM
#26
50 Watt CAFz'r
Join Date: Dec 2003
Posts: 429
Originally posted by Livin - Loud:
</font><blockquote>quote:</font><hr />Originally posted by MB:
its very easy to change the number on a ANL fuse .... a little nailpolish remover and marker.
</font><blockquote>quote:</font><hr />Originally posted by MB:
its very easy to change the number on a ANL fuse .... a little nailpolish remover and marker.
instead of thinkiong of ways to cheat, use your knowledge and find ways of being loud and winning within the rules....
Livin Loud </font>[/QUOTE]I've been "around" the comp scene for a "few" years. Just trying to offer input to make these rules bulletproof as "bending" of the rules is always a huge factor in many competition organizations.
I'm 100% in full support of this and I thank everyone who is putting time and effort into this.
[img]graemlins/thumb.gif[/img] [img]graemlins/thumb.gif[/img]
01-15-2005, 02:39 PM
#28
It isn't hard to change the fuse rating, but it wouldn't be too hard to realize that someone has changed it either, and swap the fuse for a new one at the judge's discretion.
I think we need a rule for that
- If any evidence of tampering with the rating on the fuse between the battery and the amplifier is detected; the judges, at their discretion will swap that fuse for one with a known rating.
I think we need a rule for that
- If any evidence of tampering with the rating on the fuse between the battery and the amplifier is detected; the judges, at their discretion will swap that fuse for one with a known rating.
01-16-2005, 01:02 PM
#29
--SPECIAL ED--
Join Date: Jan 2005
Posts: 98
DRAFT 5
I think this is pretty much final
Rookie 1
Maximum total inline fuse rating of 80 amps is allowed between the battery and the amplifier(s)
Primary fuse(s) must be located under the hood and be easily accessible and visible
Fuse rating will be judged based ONLY on the primary fuse(s) located under the hood
Maximum of one battery can be used
No more than 2 Farads of capacitance can be used
Amplification will be limited to a maximum of two channels per loudspeaker.
A limit on amplifier quantity is not enforced therefore either a single 2 channel amp or 2 monoblock amps may be used PER LOUD SPEAKER
*Note* It will be at the discretion of the judging staff as to whether an
amp is a true monoblock or an internally bridged two channel
amplifier.
IF AMPLIFIER(S) POWER OUTPUT CAN BE DETERMINED NO MORE THAN TOTAL OF 1200 WATTS RMS AT THE RATED LOWEST OHM LOAD ARE ALLOWED
Competitors will be further divided based on the cone area of all woofers in their system with a diameter of 8" or larger. The three divisions are as follows:
0-144 sq" (1 12, 1 10, 1-2 8s)
144-300 sq" (1 18, 1 15, 2 12s, 2-3 10s, 3-4 8's)
301+ sq"
*Note* woofer diameters are manufacturers listed size not the actual external diameter of the loudspeaker
Rookie 2
Maximum total inline fuse rating of 150 amps is allowed between the battery and amplifier(s)
Primary fuse(s) must be located under the hood and be easily accessible and visible
Fuse rating will be judged based ONLY on the primary fuse(s) located under the hood
Maximum of one battery can be used
No more than 2 Farads of capacitance can be used
Amplification will be limited to a maximum of two channels per loudspeaker.
A limit on amplifier quantity is not enforced therefore either a single 4 channel amp, two 2 channel amps or 4 monoblock amps may be used PER LOUD SPEAKER
*Note* It will be at the discretion of the judging staff as to whether an
amp is a true monoblock or an internally bridged two channel
amplifier.
IF AMPLIFIER(S) POWER OUTPUT CAN BE DETERMINED NO MORE THAN TOTAL OF 2400 WATTS RMS AT THE RATED LOWEST OHM LOAD ARE ALLOWED
Competitors will be further divided based on the cone area of all woofers in their system with a diameter of 8" or larger. The three divisions are as follows:
0-144 sq" (1 12, 1 10, 1-2 8s)
144-300 sq" (1 18, 1 15, 2 12s, 2-3 10s, 3-4 8's)
301+ sq"
*Note* woofer diameters are manufacturers listed size not the actual external diameter of
the loudspeaker
Other Regulations
box height may not exceed 21 inches from the vehicle floor to the top of the box
box has to be located in the cargo area of the vehicle
amplifiers and capacitors may be mounted to the back of rear seats
amplifiers under seats are permitted
3rd row seats may be removed from the vehicle to allow for more room for box and other equipment
2nd row seats may be folded down BUT NOT removed from the vehicle
subwoofer enclosures may not be placed atop of rear seats, however, rear seats DO NOT need to be fully functional
front seats may not be removed from the vehicle
front seats may be moved, folded and other wise adjusted at competitors discretion
battery running voltage may not exceed 15 volts
aftermarket alternators and batteries are allowed
battery must be installed in the stock location
head unit must be installed in the dash
SPL Measurement
competitor goes through a 30 second run where that competitor's average spl is measured
microphone can be placed anywhere front of the B-pillar and above side window line
windows may be open at competitors discretion
doors may not be open
trunk/hatch and hood of the vehicle may not be open
competitors are permitted to use any recording materials at their disposal
competitors must use the vehicle's primary in dash head unit as the source of audio signal
Q and A
Q: How can I tell if my amplifier is a true monoblock or an internally bridged two channel amplifier?
A: The best way to tell if an amplifier is a true monoblock is to consult the owners manual. A true monoblock amplifier can be strapped with another identical amplifier to double its output. If the manual mentions a procedure to connect two of your amplifiers together in order to double the power output then it is considered a true monoblock amplifier.
I think this is pretty much final
Rookie 1
Maximum total inline fuse rating of 80 amps is allowed between the battery and the amplifier(s)
Primary fuse(s) must be located under the hood and be easily accessible and visible
Fuse rating will be judged based ONLY on the primary fuse(s) located under the hood
Maximum of one battery can be used
No more than 2 Farads of capacitance can be used
Amplification will be limited to a maximum of two channels per loudspeaker.
A limit on amplifier quantity is not enforced therefore either a single 2 channel amp or 2 monoblock amps may be used PER LOUD SPEAKER
*Note* It will be at the discretion of the judging staff as to whether an
amp is a true monoblock or an internally bridged two channel
amplifier.
IF AMPLIFIER(S) POWER OUTPUT CAN BE DETERMINED NO MORE THAN TOTAL OF 1200 WATTS RMS AT THE RATED LOWEST OHM LOAD ARE ALLOWED
Competitors will be further divided based on the cone area of all woofers in their system with a diameter of 8" or larger. The three divisions are as follows:
0-144 sq" (1 12, 1 10, 1-2 8s)
144-300 sq" (1 18, 1 15, 2 12s, 2-3 10s, 3-4 8's)
301+ sq"
*Note* woofer diameters are manufacturers listed size not the actual external diameter of the loudspeaker
Rookie 2
Maximum total inline fuse rating of 150 amps is allowed between the battery and amplifier(s)
Primary fuse(s) must be located under the hood and be easily accessible and visible
Fuse rating will be judged based ONLY on the primary fuse(s) located under the hood
Maximum of one battery can be used
No more than 2 Farads of capacitance can be used
Amplification will be limited to a maximum of two channels per loudspeaker.
A limit on amplifier quantity is not enforced therefore either a single 4 channel amp, two 2 channel amps or 4 monoblock amps may be used PER LOUD SPEAKER
*Note* It will be at the discretion of the judging staff as to whether an
amp is a true monoblock or an internally bridged two channel
amplifier.
IF AMPLIFIER(S) POWER OUTPUT CAN BE DETERMINED NO MORE THAN TOTAL OF 2400 WATTS RMS AT THE RATED LOWEST OHM LOAD ARE ALLOWED
Competitors will be further divided based on the cone area of all woofers in their system with a diameter of 8" or larger. The three divisions are as follows:
0-144 sq" (1 12, 1 10, 1-2 8s)
144-300 sq" (1 18, 1 15, 2 12s, 2-3 10s, 3-4 8's)
301+ sq"
*Note* woofer diameters are manufacturers listed size not the actual external diameter of
the loudspeaker
Other Regulations
box height may not exceed 21 inches from the vehicle floor to the top of the box
box has to be located in the cargo area of the vehicle
amplifiers and capacitors may be mounted to the back of rear seats
amplifiers under seats are permitted
3rd row seats may be removed from the vehicle to allow for more room for box and other equipment
2nd row seats may be folded down BUT NOT removed from the vehicle
subwoofer enclosures may not be placed atop of rear seats, however, rear seats DO NOT need to be fully functional
front seats may not be removed from the vehicle
front seats may be moved, folded and other wise adjusted at competitors discretion
battery running voltage may not exceed 15 volts
aftermarket alternators and batteries are allowed
battery must be installed in the stock location
head unit must be installed in the dash
SPL Measurement
competitor goes through a 30 second run where that competitor's average spl is measured
microphone can be placed anywhere front of the B-pillar and above side window line
windows may be open at competitors discretion
doors may not be open
trunk/hatch and hood of the vehicle may not be open
competitors are permitted to use any recording materials at their disposal
competitors must use the vehicle's primary in dash head unit as the source of audio signal
Q and A
Q: How can I tell if my amplifier is a true monoblock or an internally bridged two channel amplifier?
A: The best way to tell if an amplifier is a true monoblock is to consult the owners manual. A true monoblock amplifier can be strapped with another identical amplifier to double its output. If the manual mentions a procedure to connect two of your amplifiers together in order to double the power output then it is considered a true monoblock amplifier.
01-16-2005, 03:00 PM
#30
2000 Watt CAFz'r
Join Date: May 2003
Posts: 2,819
A few questions I have....
Engine running or not?if so, in all classes or certain classes?
What happens if an amplifer rated up to 2400 watts pops a fuse rated at 150 A?
Does the fuse need to be of the ANL type or can it be of an industrial grade?(due to the gauge of wire I'm using,I'm going to be using an industrial style fuse holder which means either modding an ANL fuse or using a MEG fuse)
BTW....I would say so far so good...
Engine running or not?if so, in all classes or certain classes?
What happens if an amplifer rated up to 2400 watts pops a fuse rated at 150 A?
Does the fuse need to be of the ANL type or can it be of an industrial grade?(due to the gauge of wire I'm using,I'm going to be using an industrial style fuse holder which means either modding an ANL fuse or using a MEG fuse)
BTW....I would say so far so good...
