MIDWEST SPL

Points are required to compete in world finals. Midwest SPL has several divisions listed here:

For full rules and regulations please CLICK HERE

Midwest Street Division

MSD – Classes are for beginner and entry level competitors only. Manufacturers, retailers, and professionals are prohibited from participating in these classes. This includes – but is not limited to: Anyone that has competed at ‘any’ World FINALS, anyone that is a current member of another sound-off organization, or someone that has higher skills or knowledge than others in their class. Moving someone out of these classes is at the sole direction of the event promoter or judge. Local level rules and classes may vary from event to event. These are typically offered at most Midwestspl Events. All MSD competitors are required to play music (no tones or sweeps).

Typical classes offered (could change depending on the needs of the retailer):

• MSD 1 – Up to 1-12, 2-10’s, or 3-8’s (peak score)

• MSD 2 – Up to 1-15, 2-12’s, 3-10’s or 4-8’s
(peak score)

• MSD 3 – Up to 1-18, 2-15’s, or 4-12’s (peak score)

The rules for the MSD are suggested rules, and can vary from show to show depending on the specific needs of the retailer/show promoter. The following rules are typical of what you will see:

• Doors and windows may be open

• Engine RPM limit 2000

• Parking break must be set

• Walls are permitted

• Vehicles must have 2 front seats

Rookie Division

The term “Rookie” is defined as any individual that has never competed in any organization’s “World/National” finals. Vehicles that have also been used at any “World/National” finals are also prohibited from this Division.

Upon determination that an individual has circumvented the term “Rookie”, his or her points will be removed from that season’s participation in those classes deemed “Rookie” level.

Classes:
• Rookie Tone – B-pillar, unlimited speakers, unlimited power (non-clamped), burp or music, peak score, 30 seconds

• Rookie Xtreme – Xtreme Rules, unlimited speakers, unlimited power, 30 second music average 12” outside passenger window.

• Rookie Kaos – Kaos Rules, unlimited subs, unlimited power, 90 second music average, meter in center of windshield.

Rookie competitors/vehicles are eligible to qualify and compete at Midwestspl National Finals. Only the top 8 competitors (in their class) will be invited. Rookie competitors must acquire 100 points during the season (50 points in their desired Finals class), and attend a minimum of 4 shows.

Basic Division

Classes:

• Basic 1 – Up to 1-15, 2-12’s, 3-10’s, 4-8’s, or
7-6.5’s, up to 1,000 watts (max clamped)

• Basic 2 – Up to 1-24, 1-21, 1-18, 2-15’s, 4-12’s or 6-10’s, 9-8’s, 14-6.5’s up to 2,000 watts (max clamped)

• Basic 3 – Unlimited Speakers, up to 4,000 watts
(max clamped)

• Basic 4 – Unlimited Speakers, up to 8,000 watts
(max clamped)

• Basic Trunk – Unlimited Speakers, up to 2,000
watts (max clamped)

9-1 CRX’s, or any vehicle not originally designed for the US domestic market, are not allowed in Basic 1 or 2.

Midwestspl defines a vehicle not originally designed for the US domestic market as a vehicle not originally offered for widespread sale as new by an OEM (Original Equipment Manufacturer) in the United States. This includes, but is not limited to, Fiat Panda’s, Seat Marbella’s, and Seat Terra. Proof of OEM sale availability may be required upon inspection of vehicles in question.

9-2 Structural modifications to the passenger or cargo compartment are not permitted.

9-3 Custom installations and/or custom panels are permitted provided no other rules are violated.

9-4 Subwoofers and enclosures must be in the “cargo” area.

9-5 Subwoofers and enclosures may not sit on top of a folded rear or 2nd row seat.

9-6 Seats and seat backs must be fully functional when the enclosure is in its competition position. If the vehicle is an extended-cab or king-cab pickup truck, you do not need to be able to fold the rear (side or forward facing) seats as normal operation.

9-7 Enclosures may be “built” into the trunk of the vehicle. However, the construction may not be permanent, and the competitor must easily be able to return the vehicle to its original/OEM condition. Competitors may be asked to provide proof that the installation meets these guidelines.

9-8 Speaker walls are not permitted.

9-9 Any audio equipment used to produce SPL must be below the window line, (referred to as the wall test).

Exception: If the two seat vehicle has less than 24” of maximum B-pillar to back depth in the cargo area, then that vehicle may use all of the cargo area for the subwoofer enclosure and equipment installation, provided no other rules are broken.

9-10 Commercial vehicles, those with no rear 2nd or 3rd row seating, and/or have floor cuts, such as a handicap van or an ambulance, are not allowed.

9-11 Sensor placement in the legal position.

Advanced No Wall Division

Classes:

• Advanced No Wall – Unlimited Speakers / Power

9-12 Structural modifications to the passenger compartment are not permitted in front of the “B” pillar. Interior modifications are allowed – provided the modification is behind the “B” pillar and under the “wall test”.

9-13 All windows and openings need to function normally in front of the “B” pillar and above the widow line.

9-14 Cut-throughs in pickups are permitted.

9-15 Speaker walls are not permitted.

9-16 Commercial vehicles that have floor cuts, such as a handicap van or an ambulance, are not allowed.

9-17 Two seat vehicles, such as a CRX, EXP, RX7, or Corvette, may have all equipment up to the B-pillar.

9-18 Sensor placement in the legal position.

Marine Subwoofer with RGB Lights

Advanced C Division

Classes:

• Advanced C – Up to 1-24, 2-21’s, 2-18’s, 4-15’s, 6-12’s, 9-10’s, 14-8’s, 21-6.5’s, and up to 4,000 watts (max clamped)

9-19 Subwoofers and enclosures must be behind the “C” pillar or 2nd row seat, whichever is furthest back.

9-20 If the vehicle only has 1 “C” pillar, then the “string test” will be replaced with measuring (with a tape measure) from the “B” pillar back, to determine box location.

9-21 2nd row seating must remain functional. Reclining 2nd row seat is not required.

9-22 Structural modifications to the passenger compartment are not permitted in front of “C” pillar.

9-23 All windows and openings need to function normally in front of the “C” pillar.

9-24 Speaker walls are permitted – but not required.

9-25 Two seat vehicles are not allowed.

9-26 Sensor placement in the legal position.

9-27 Only vehicles which do not qualify for standard Basic rules are allowed.

Advanced Division

Classes:

• Advanced 1 – Up to 1-24, 2-21’s, 2-18’s, 4-15’s, 6-12’s, 9-10’s, 14-8’s, 21-6.5’s, and up to 4,000 watts (max clamped)

• Advanced 2 – Up to 2-24’s, 3-21’s, 4-18’s, 6-15’s, 9-12’s, 13-10’s, 21-8’s, 31-6.5’s, and up to 8,000 watts (max clamped)

• Advanced 3 – Unlimited Speakers, Unlimited Power

9-28 Structural modifications to the passenger compartment are not permitted in front of “B” pillar.

9-29 All windows and openings need to function normally in front of the “B” pillar (excluding sunroofs).

9-30 Speaker walls are permitted – but not required.

9-31 Two seat vehicles, such as a CRX, EXP, RX7, or Corvette, may have all equipment up to the B-pillar.

9-32 Sensor placement in the legal position.

Need car remotes? Replace for less at CarandTruckRemotes.com

Xtreme Division

Xtreme 1 & 2 use Basic Rules, Xtreme 3 & 4 use Advanced Rules for the following:

Classes:

• Xtreme 1 – Up to 1-15, 2-12’s, 3-10’s, 4-8’s, or 7-6.5’s / Unlimited Power

• Xtreme 2 – Unlimited Woofers / Unlimited Power

• Xtreme 3 – Up to 1-24, 2-21’s, 2-18’s, 4-15’s, 6-12’s, 9-10’s, 14-8’s, or 21-6.5’s/ Unlimited Power

• Xtreme 4 – Unlimited Woofers / Unlimited Power

9-33 All passenger side doors must remain shut during the run, but other windows (including passenger side), doors and other openings can remain open.

9-34 Scores will be averaged for 30 seconds during the run.

9-35 Xtreme Division will measure the audio system’s SPL 12 inches from the opening of the front passenger’s door window, centered left to right of window opening, level with the opening (window seal) outside of the vehicle.

9-36 Competitors/spectators may not crowd around or “cup” the sensor during the metering process. The distance away is up to the head judge. At FINALS, only the operator of the vehicle may stand “between the bumpers”. Competitors and teams are allowed to sit on top of the vehicle as long as no other rules are violated.

Kaos Division

Kaos 1 & 2 uses Basic Rules, Kaos 3 & 4 uses Advanced Rules – except for the following:

Classes:

• Kaos 1 – Up to 1-15, 2-12’s, 3-10’s, 4-8’s, or
7-6.5’s / Unlimited Power

• Kaos 2 – Unlimited Woofers / Unlimited Power

• Kaos 2 Clamped – Unlimited Woofers / 4,000 Watts Clamped Peak

• Kaos 3 – Up to 1-24, 2-21’s, 2-18’s, 4-15’s, 6-12’s, 9-10’s, 14-8’s, or 21-6.5’s / Unlimited Power

• Kaos 4 – Unlimited Woofers / Unlimited Power

• Kaos 4 Clamped – Unlimited Woofers / 8,000 Watts Clamped Peak

9-37 Scores will be averaged for 90 seconds during the run.

9-38 The SPL sensor will be placed inside the vehicle on the center of the windshield – centered horizontally and vertically.

9-39 Kaos 2 Clamped will be exactly like Kaos 2, except the maximum wattage peak will be tracked.

Off Road Wheels

Mayhem Division

Mayhem Division will adhere to the general Midwestspl rules, except for the following changes –

Classes:

Mayhem – Unlimited Woofers / Unlimited Power

9-40 Music must be played.

9-41 Scores will be averaged for 90 seconds during the run.

9-42 Interior modifications are REQUIRED. Modifications are allowed anywhere in the vehicle. Anything goes (floor cuts, battery boxes, double windshields, roof build downs, stripper poles, seat removal, wood floor, bolt doors shut, etc.) ONLY THOSE vehicles which have interior modifications that prohibit them from competiting in any other Midwestpl class may participate in Mayhem.

9-43 The maximum voltage of the vehicle’s electrical system can not be higher than 18.0 volts during the entire run.

9-44 Sensor placement in the legal position.

ChromeBattery.com

Additional Classes

At some events, additional classes may be offered. These classes are for fun and do not accumulate points for FINALS.

• Loud N Low – This format requires the competitor to play 4 tones (20hz, 25hz, 30hz, & 35hz). The scores from these tones will be averaged together to achieve a final score. Sensor placement is in the center of the windshield, measured vertically and horizontally. Advanced Division rules apply.

• Top Dog – This format uses track 19 on the Midwestspl CD. The track highlights frequencies between 30-50hz. Competitors must play this track for at least 30 seconds while the computer takes an average score. Sensor placement is in the center of the windshield, measured vertically and horizontally. Advanced Division rules apply.

• S.L.A.M (Sound Looks and Modifications) – This is a car show style format. Competitor’s vehicles are judged on all aspects of their vehicle as the title says. The more done to the vehicle, the cleaner it is, and the better it sounds, will allow the competitor to achieve the highest score possible.

Midwest SPL Music

MIDWEST SPL SELLS A MUSICAL CD AND ACCORDING TO THEIR RULEBOOK IN TOP DOG TRACK 19 IS REQUIRED.

CLICK HERE TO PURCHASE THE MIDWEST SPL LIST RACE CD

Midwest SL Rulebook:

  • Top Dog – This format uses track 19 on the Midwestspl CD. The track highlights frequencies between 30-50hz. Competitors must play this track for at least 30 seconds while the computer takes an average score. Sensor placement is in the center of the windshield measured vertically and horizontally. Advanced Division rules apply.