ISPLL

We recommend visiting ISPLL.com to verify your classing and to familiarize yourself with the general rules of the organization. Below is a basic breakdown of the formats offered and a helpful guide to finding the right event for your system.

Amplifiers are Clamped and classed based on the matrix below. Cone Restrictions apply to classes in orange.

SUBSONIC SUICIDE

ISPLL Subsonic Suicide is a 2 minute musical average using a subsonic track under 32hz. Each 1Hz below 32 you play at will add .25dB to your final score (i.e. you play the 28Hz track, you will receive a 1dB bonus on your final average). If you play the 20Hz track or below, you will receive an additional 2dB bonus to your final score (5dB total bonus). If you play the 15Hz track or below, you will receive an additional 1dB bonus to your final score (7.25dB total bonus). The mic is placed on the dash.  Competitors may open any door, window, hatch, trunk, etc. that they wish to, before and during (AKA “fanning”) the run.

DEMO SHOWDOWN

It is a 90 second musical average. Metering will take place on the passenger side headrest and the driver side window (approx. 3-6” outside the vehicle). The driver side window location will be as close to the window opening as the vehicle physically allows (the sensor is placed on a microphone stand standing on the ground outside the vehicle, almost against the door). Only the driver side window and/or passenger side window may be open during the rounds, no doors.

ALL AROUND

All Around is a 30 second musical average.  The music must be commerically available as in all SPL Competition.  Metering will take place on the passenger side windshield (legal position), passenger seat headrest, and passenger side kick (outlaw position). Only the driver side door OR window may be open during the rounds. The average of these 3 scores creates your final score.

REAL SPL

REAL SPL is now 3 burps of the desired frequency (not to exceed 90Hz) that the competitor chooses. All burps CAN be the same frequency, but do not have to be. Final score will be determined by the average of the three scores.

First Burp – Mic on windshield at legal location with vehicle sealed.

Second Burp – Mic on windshield at legal location with vehicle open. Vehicle open is any part(s) of the vehicle open the competitor would like including, but not limited to, front doors, back doors, trunk, hatch, etc.

Third Burp – Mic on the kick with the same rules as the second burp.