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 | 30cm =12” | 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 E-Category 2 Woofer
- ESPL E-Category 4 Woofer
- ESPL E-Category 8 Woofer
- ESPL E-Category 16 Woofer
- ESPL X Unlimited