Classes

Music

Street A – 1×12″ , 2×10″ , 3×8″ , 4×6.5″
Street B – 1×15″, 2×12″, 3×10″, 4×8″ , 5×6.5″
Street C – 1×18″, 2×15″, 3×12″, 4×10″, 5×8″ , 6×6.5″
Extreme - 18" and larger. Quantity is not limited.

„Sine“ class:

 Street 799W - The quantity and size of elements is not limited. The equipment must fit in the trunk. Frequency limit 60hz.
Street 1799W - The quantity and size of elements is not limited. The equipment must fit in the trunk. Frequency limit 60hz.
Extreme - No power limit. Frequency limit 80hz.

Power-restricted „Street“ class, street class cabin and other rules apply..

General info

„Street“ class

1. Competitors in music classes are placed in classes according to the size and number of subwoofers.
2. There is a power limit in sine classes.
3. „Street“ class (with music and sine power limitation):
4. The car must have an inspection and valid insurance. M1 category.
5. All measurable equipment must fit in the trunk (woofers and amplifiers) and the interior of the car must remain close to the original.
6. It is allowed to build "door boxes" for the front speakers.
7. The rear seat must close and open as the factory did.
8. There is no height limit for equipment in the trunk.
9. Only soundproofing products are allowed to insulate the vehicle.
10. For the purpose of strengthening the body, plywood, aluminum angles and similar products are prohibited.
11. The roof reinforcement post is prohibited.
12. Adding extra power is allowed in the trunk.
13. It is allowed to use lithium battery banks, etc. Must be installed safely and securely.
14. It is not allowed to install batteries, amplifiers, etc. in the cabin.
15. Modification of the body for the purpose of adding a power supply is prohibited.
16. The "wall" behind the B and C pillars is prohibited.
17. It is forbidden to remove the upholstery.
18. The number of alternators and additional power sources is unlimited.
19. Fellow competitors are allowed to "hold" the car. Belts and other devices are prohibited.

„Extreme“ class

1. Extreme classes include cars that do not fit into Street classes and have a subwoofer size 18+.
2. It is allowed to build any type of subwoofer box, wall behind the B-pillar of the car interior.
3. All possible body reinforcements and modifications are allowed.
4. It is allowed to use thicker glasses.

Measurement

Street A, B , C and Extreme

1. The contestant has to show his best result within one minute, using his own freely chosen story.
2. The use of sine tone is not allowed!
3. Each competitor has two attempts to achieve the best result.
4. During the measurement, one freely chosen front door must be open. Other doors and windows are closed during the measurement.
5. During the measurement, the maximum revolutions of the car engine are 3000rpm.
6. Judges have the right to disqualify a competitor who uses a sine tone.

Sine

1. The competitor has to show his best result within 30 seconds using the sine tone.
2. All windows and doors must be closed during the measurement.
3. Power limited, i.e. in the „Street“ class, the frequency limit is 60hz.
4. In the „Extreme“class, the frequency limit is 80hz.
5. A power limited class must have access to the amplifier to install power measuring devices.
6. Power-limited class "banana plugs" for power measurement are mandatory.
7. During the measurement, the maximum revolutions of the car engine are 3000rpm.

The final word rests with the judges. Failure to follow the rules will result in disqualification from the competition!

Contact us if you have questions: estoniansplandsound@gmail.com