ESPL

EMMA Sound Pressure League

 

Measurement closed:

The first measurement will be with the doors closed – a minimum 30 seconds of music will be played.

Within this measurement, the peak SPL will be measured. Within the next 2 minutes a second measurement will follow:

Measurement open:

The second measurement will be done with both front doors completely open – a minimum 30 seconds of music will be played with the same track as in the first measurement. Within this measurement, the average SPL will be measured.

 

ESPL Categories:

  • ESPL Trunk €1000
    • value of Subwoofers + Amplifiers = 1.000€
    • no professionals, no judges/EMMA officials
    • only one battery in the OEM-location allowed
    • Max 16 woofer see matrix on page 14
  • ESPL Trunk- 1 Woofer
  • ESPL Trunk- 2 Woofer
  • ESPL Trunk- 4 Woofer

Installation:

  • Moderate installation requirements see matrix on page 15

Restrictions on all Trunk classes:

  • The subwoofers including enclosure ports etc must be within the trunk compartment
  • Max 16 woofer see matrix on page 15
  • No voltage above 14.6 Volts

 

  • ESPL B / R- limited
    • Enclosure from B pillar and no higher than original rear seat (not including head rests)
    • Or behind original rear seats to top

Installation:

  • Moderate installation requirements see matrix on page 15

Restrictions:

  • No voltage above 14.6 Volts
  • Max 16 woofer see matrix on page 15

 

  • ESPL Wall – limited

Installation:

  • Moderate installation requirements see matrix on page 15

Restrictions:

  • No voltage above 14.6
  • Max 16 woofer see matrix on page 15
  • The subwoofers including enclosure ports etc must be behind the OEM B pillar the enclosure can reach up to the roof of the car

 

  • ESPL Expert

Installation:

  • Extreme installation is appreciated and beneficial see matrix on page 15

Restrictions:

  • The subwoofers including enclosure ports etc must be behind the OEM B pillar the enclosure can reach up to the roof of the car

 

 

Matrix ESPL
    T / R /B / W Expert
    112+ 122+
  Measurement with open doors    
  Measurement with closed doors    
  Install Max. points 112 122
  Presentation to the public 10 10
  Cleanliness 6 6
  Main fuse(s) present y/n 10 10
  Are all wires to the components fused? 15 15
  Is the fuse value appropriate to the wire size? 20 20
  Any interior wires visible? 5 5
  Are all components securely mounted? 24 24
  Does the vehicle allow a normal use? 6 6
  Visibility 6 6
  First Optic impression 10 10
  Overall design of vehicle   10

 

Subwoofer Matrix
  Subwoofer size Trunk Trunk Trunk B/R, Wall
    1 Woofer 2 Woofers 4 Woofers 16 Woofers
  6,5″ 2 4 8 32
  8″ 1 3 6 24
  10″ 1 2 4 16
  12″ 1 2 8
  15″ 1 5
  18″ 1 4
  21″ 2
  33″ 1