ESPL

EMMA Sound Pressure League

The EMMA Sound Pressure League is made for those kinds of competitors who are interested in the maximum level of volume in their cars – not forgetting about a safe installation and neat appearance. To guarantee similar conditions and fairness to all competitors, the amount of subwoofers will be regulated in the following terms in all categories:

- All the installed and connected woofers will be calculated as shown in the table below.
- It is defined, that one 25cm=10” woofer will be counted as one woofer. Since not all people have 10”woofers installed, the following calculation key will be used.

Number of woofers Size of woofer   Classification Circumference (No longer than)
1x 25cm =10” Equals 1 woofer 78,5cm
1x 25cm =10” Equals 2 woofers 94,2cm
3x 20cm = 8”/6”x9” Equals 2 woofers 62,8cm (per 8”)
1x 38cm =15” Equals 3 woofers 119,3cm
1x 46cm =18” Equals 4 woofers 144,4cm
 

Judging procedure for all ESPL classes:

- Installation check according to the matrix.
- Measurement with closed doors.
- Measurement with open doors.

ESPL Advanced, Master & Expert will be National and International Championships.

ESPL Advanced

Classifications: – Advanced Trunk 22 WoofersAdvanced Trunk 44 WoofersAdvanced Trunk Unlimited

Rules for all Advanced classes:

- The audio system can be installed by anyone.
- The vehicle must be registered with a license number (licence plates can be removed during the competition.
- The car must have driver and passenger side seats installed in original condition or similar (sport seats,etc.).
- The maximum voltage is 14, 6 Volts with the engine running or not, measured on the amplifier’s power input.
- No modified or self built active (=power supplied) equipment is allowed (e.g. head unit, line driver, amplifier, active crossover etc.).
- A maximum of two channels of amplification are allowed per physical installed woofer (two channels bridged to one is counted as one)
- All components of the audio-system have to be installed into the vehicle – trailers etc. are not allowed.

Additional rules for Advanced Trunk 2, 4, Unlimited, classes:

 - The subwoofers (including enclosures, ports, etc.) must be installed in the trunk area (retractable rearseat must be  - locked in upright position) with a maximum height not higher than the top of the original rear seat (not headrests!).
- The rear seats must be locked and fixed in upright position (90 degrees or more).
- The car must be approximate to the “original” from C-pillar to the front and should look original.
- Panels (door, kick, dash, etc.) are allowed from C-pillar to front.
- The vehicles can be moderately damped (approx. 5mm thick). If polyurethane-foam, concrete, etc. is used, the car has to compete in the appropriate higher class that allows the extra damping.
- The source unit must be installed and fixed properly into the car.

ESPL Master

Classification: – Master R unlimitedMaster B unlimitedMaster W unlimited

ESPL Master is taking the ESPL competition to a sophisticated level. The top vehicles of this category represent nearly everything achievable in the vehicle environment. The top competitors will be highly respected and set an example to the international crowd of EMMA competitors. The competitors will receive qualified feedback about the SPL and installation of their mobile electronics-systems with potential for improvements in the future.

This category is open to anyone!

Rules for all Master classes:

 - The audio system can be installed by anyone
 - The car can be registered or not registered, with or without license plates.
 - The car must be able to be driven by its own engine
 - The car can be heavily modified, damped, etc.
 - At least a driver’s seat must be installed (a car-seat, not a bench or a piece of wood to sit on)
 - Modified or self built equipment is allowed
 - There is no limit on the voltage (it can be higher than 14,6V)
 - All components of the audio-system have to be installed into the vehicle – trailers etc. are not allowed.
 - The source unit can be installed properly into the car or OUT of the car.
 - A maximum of 16 Subwoofers (or equivalent) are allowed to be used in ESPL Master

Additional Rules for Master R unlimited class:

 - The subwoofers (including enclosures, ports, etc.) must be installed in the trunk area (retractable rear seat must be locked in upright position). The enclosure can reach up to the roof of the vehicle.

Additional rules for Master B unlimited class:

 - The subwoofers (including enclosures, ports, etc.) can be installed from the trunk to the B-pillar, with a maximum height not higher than the top of the original rear seat (not headrests!).

Additional rules for Master W unlimited class:

 - The subwoofers (including enclosures, ports, etc.) can be installed from the trunk to the B-pillar, from floor to ceiling.

ESPL Expert

Classification: – Expert Unlimited

ESPL Expert is similar to ESPL Master, but not only is the quality of the installation and of course the volume level important, but also the design and styling of the competition car will be judged.

The competitors will receive qualified feedback about the SPL-measures and installation of their systems with potential for improvements in the future.

This category is open to anyone!

Rules for Expert classes:

- The audio system can be installed by anyone.
- The car can be registered or not registered, with or without licence plates.
- The car must be able to be driven by its own engine.
- The car can be heavily modified, damped, etc.
- At least a driver’s seat must be installed (a car-seat, not a bench or a piece of wood to sit on)
- Modified or self built equipment is allowed.
- There is no limit on the voltage (so it can be higher than 14,6V).
- All components of the audio-system have to be installed into the vehicle – trailers etc. are not allowed.
- The source unit can be installed properly into the car or out of the car.