Woofer 461 above cu in (Ultimate power)
Measuring Procedures: -
1. Each competitor are given 2 chances, 30 seconds each chance. Highest score will be taken.
2. Midrange and tweeters must have a reasonable volume to support the sub bass until the 30 seconds time frame.
3. Upon the measuring SPL started, if one of the component no sound and break down or system down (including cracking of the cone, voice coil problems) (not including dust cap losing). The score will not be taken and the competitor lost one chance. The competitor are given chance to rectified the problem for the second chance or redrawn from the competition.
4. In the process of measuring SPL, competitor are allowed to tune up or maintain the volume to achieve his desire SPL, but they are not allow to tune down the volume. There will be a video recorder recording the whole process until the end of the measurement. Competitors who found tune down the volume will be disqualified (including the score). But the competitor still has the second chance, if it is only the 1st chance he uses. But if the competitor still found repeating the same mistake, he will be disqualified and will not have the 3rd chance.
5. The official CD is Techno Bass Nation and the music can use track 2,3,5,8,9, 13,17. Competitors are ask to play this music from the start till 30 sec, during this 30 sec, all the driver (high, mid, low) must have sound.(Songs will be informed of any change)
6. During the music, there cannot have “kong kong” or “fu fu” sound of strong wind, or weird sound from in-sequence movement of the sub woofers. Each bass note has to be clearly being listened and the entire woofer cone must have almost the same kind of movement. If the above weird sound appears, then the competitor will be disqualified and on the spot will be given 2 min to make adjustment for the second test. If the second test also same kinds of sound appear, then the competitor will be disqualifying again and will not give the 3rd test.
7. During the music, every single bass note has to be clearly being heard from the sub woofer like 10, 12 or 15 inches. If the line judges have doubt on the system, he has the right to ask the competitor to turn off the midbass and test the sound from the sub woofers. If found cheat or problems, the competitor will be disqualify and on the spot will be given 2 min to make adjustment for second test. If the second test also same kind of sound appears, then the competitor will be disqualifying again and will not give the 3rd test.
Judging Standards
1. MACE calculation; Amplifier maximum output + square inches of the subwoofer cone area. (Outer SPL)
2. Only calculate those which connected to the subwoofers.
3. The fuses for the subwoofers amplifiers should be with the correct value.
4. There should not have splitters, distributions blocks (without fuses) after any fuse box or distributions box.
5. The allowable fuse boxes are: - AGU, AUE, Maxi, ANE or ANL etc. A, allowable fuse value for AGU/AUE are: 20, 30, 40, 50, 60Amp. B, allowable fuse values for Maxi are: 40, 50, 60 and 80Amp. C, allowable fuse values for ANL/ANE are: 100, 150, 200, 250 or 300Amp.
6. Circuit breaker is not considered as a fuse.
7. After inspection, competitors are not allowed to change the fuses, unless getting approval from the judges.
8. If the system doesn’t have a fuse system, then it will use the amplifier built-in fuse value. If the amplifier also don’t have fuse, then it will use the maximum output of the amplifier to count the value. The calculation is: - the maximum output of the amplifier (with the lowest impedance) divided by 13.
9. The amplifier uses for the subwoofers should use the correct fuse for protection. By doing this, an extra bonus of 2 points will be added. Example: - if the result is 138dB + bonus = 140dB, hence the final score will be 140dB.
10. MACE judges will justify the categories for the competitors.
11. Competitor should show the amplifier manual for verification, prior for that will be given 1 extra point.
12. The entire vent should not be over the hook of the car.
13. The boot has to able to close in the normal manner.
Location of the microphone
1. The microphone should place at the MACE approved stand.
2. During the competition, competitors are not allowed to touch or move the microphone.
3. The position of the microphone shall always be facing the front of the car and should be stable during the whole testing.
4. Outer SPL measurement.
• The distance for the microphone and the sub enclosure is 36 inches (from dust cap). Example: calculation distance from the inner sub woofer dust cap and the out most sub woofer dust cap distance added up and divide by 2. Then the microphone is free to move but will keep the distance of 36 inches.
• Microphone basically will be place 36 inches away and the competitor can choose the height of the mic. But he mic cannot direct face the vents and should place on the place where there are no vents. The judges can adjust up and down or left or right directions.
• Microphone cannot place closer then 12 inches from the hook.
• If the sub woofer installed at the inner place holds only 40% of the entire system and the sub woofer installed at the outer place holds 60% or more, then the distance of the mic should count from the outer sub woofers.
SPL System check
After the completion of each test, judge has the right to review
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