Sound RULES | Showdownrally

AUDIO COMPETITION RULEBOOK

Featherweight • Lightweight • Welterweight • Middleweight • Heavyweight

SECTION 1: FEATHERWEIGHT CLASS RULEBOOK

1.1 Class Overview

The Featherweight Class is designed for competitors who maintain a strict OEM stock appearance while operating compact, balanced audio systems. This is a No BBLs class focused on clean installs, controlled output, and fairness.

Featherweight Modified class

Bikes with the correct speaker count but are stretched or have BBL.

To activate the cash prize, the class must have:

5 fully compliant competitors

1.2 Equipment Allowances

1.2.1 Speaker Configuration

Maximum of (6) speakers up to 6.5 inches
Maximum of (1) 10-inch subwoofer
Total maximum speakers: 7

1.2.2 Subwoofer Placement

Subwoofer enclosure must fit entirely inside the OEM cargo tub behind the seat
May be installed on either driver or passenger side, not both
Enclosure must not alter external appearance

1.2.3 Visibility Requirements

Speakers in tub areas may not be visible from:
- Rear
- Either side of the bike

1.2.4 Beauty Plate Allowance

Beauty plate allowed on front-facing side only
May not extend more than 2 inches from the stock panel
Must follow OEM contours
(See Figure 1)

1.2.5 Tweeter & Waveguide Rules

Tweeters do not count as speakers unless using custom waveguides
Compression drivers and waveguides do count as speakers

1.3 Appearance Requirements

No BBLs permitted
Bike must retain factory silhouette
No stretched tubs, oversized panels, or extended bodywork

1.4 Definitions

True to Class: Fully compliant with all equipment, placement, and appearance rules
Speaker: Any mid, woofer, compression driver, or waveguide
BBL (Big Body Look): Any modification altering OEM body dimensions

1.5 Enforcement

Pre-judging inspection required
Non-compliant competitors will be placed in the proper class
Judges decision is final

SECTION 2: LIGHTWEIGHT CLASS RULEBOOK

2.1 Class Overview

The Lightweight Class allows increased output while maintaining stock appearance standards. This remains a No BBLs class with strict enclosure placement rules.

To activate the cash prize, the class must have:

5 competitors are required

2.2 Equipment Allowances

2.2.1 Speaker Configuration

Maximum of (8) midrange speakers up to 8 inches
Maximum of (2) 10-inch subwoofers
Total maximum speakers: 10

2.2.2 Subwoofer Placement

Subwoofer enclosures must be installed in the OEM cargo tubs:
- One behind the driver seat
- One behind the passenger seat
Enclosures must fit fully within tubs

2.2.3 Visibility Requirements

Speakers and subwoofers must not be visible from rear or sides

2.2.4 Subwoofer Size Restriction

Mixing sub sizes is prohibited
Up to 10-inch subwoofers permitted

2.2.5 Beauty Plate Allowance

Beauty plate allowed up to 2 inches from stock panel

Lightweight Modified class

Bikes with the correct speaker count but are stretched or have BBL's.

2.3 Appearance Requirements

No BBLs
Bike must maintain OEM exterior profile
No stretched tubs, oversized panels, or extended bodywork

2.4 Definitions

Speaker: Includes mids, woofers, compression drivers, waveguides
Tweeters: Not counted unless wave-guided

2.5 Enforcement

Subject to inspection at any time
Non-compliance results in disqualification.

SECTION 3: WELTERWEIGHT CLASS RULEBOOK

3.1 Class Overview

The Welterweight Class introduces larger subs and more mids while retaining box restrictions to ensure competitive balance.

To establish a bridge between lightweight and middleweight we are allowing gradual growth with those wishing to advance from one division to the other. This is the first division when moving up from featherweight or lightweight where extended enclosures will be allowed. There are three (3) options for this class ;(Rear Facing, Inside Facing, and Side Facing). The box cannot extend more than the following inches from the rear panel. Top (7 ½”), Middle (14 ½”), and Bottom (17”) inches. To the Individuals using a forward-facing box, which goes into the interior of the bike, it can’t exceed (8”) inches from stock panel. To individuals using a side-facing box it cannot extend past the rear panel and not extend past the stock armrest and must conform to the contours of the lower rear side panel. Enclosures must be either inside, rear facing, or outside and not share space both inside and outside of the slingshot.

To activate the cash prize, the class must have:

5 competitors are required

3.2 Equipment Allowances

Maximum of (10) midrange speakers up to 10 inches
Maximum of (2) subwoofers up to 12 inches

3.3 Enclosure Restrictions

Event-defined box restrictions apply

3.4 Enforcement

Subject to inspection at any time
Non-compliance results in disqualification

Welterweight modified class

Speaker count is consistent with listed rules, but box sizes (BBLs) are not regulated.

SECTION 4: MIDDLEWEIGHT CLASS RULEBOOK

4.1 Class Overview

The Middleweight Class emphasizes density and efficiency with a higher speaker count while limiting size.

It is our intention with this division, to establish a bridge between welterweight and middleweight giving gradual growth with those wishing to advance from one division to the other. The bottom of the box cannot extend past the first lug on the back wheel (not to exceed (11”) inches). The top of the box cannot go past the furthest point on the rear light of the bike. Rear facing boxes can protrude outside the sides of the bike by (2”) inches even with the stock armrest and not more.

To activate the cash prize, the class must have:

5 competitors are required

4.2 Equipment Allowances

Maximum of 20 total speakers
18 speakers up to 12 inches and 2-15 inch subwoofers

4.3 Enclosure Restrictions

Box restrictions apply
No unsafe or excessive body modifications

4.5 Enforcement

Subject to inspection at any time
Non-compliance results in disqualification

Middleweight modified class

Speaker count is consistent with listed rules, but box sizes (BBLs) are not regulated.

SECTION 5: HEAVYWEIGHT CLASS RULEBOOK

5.1 Class Overview

The Heavyweight Class is the premier unlimited-output category with the highest allowed speaker count.

Max of 34 speakers drivers count as a speakers subs are included in the 34 speaker count (No Attachments/Trailers)

To activate the cash prize, the class must have:

5 competitors are required

5.2 Equipment Allowances

Maximum of 34 total speakers
No speaker larger than 18 inches

5.3 Installation Guidelines

Custom fabrication allowed
Structural safety required
Unsafe builds are disqualified

5.5 Enforcement

Strict inspection

Heavyweight modified class

Speaker count is consistent with listed rules, but box sizes (BBLs) are not regulated.

6.1 EXTREME WEIGHT CLASS WILL COMPETE FOR A CHAMPIONSHIP BELT.

Extreme (anything with a rooftop or trailer not built onto an EXISTING part of the sling)
CLASS MUST HAVE PRIZE # OF TRUE TO CLASS
FW 5 $250 3
LW 5 $250 3
WW 5 $350 3
MW 5 $500 3
HW 5 $500 3
EW ANY# CHAMPIONSHIP BELT
NOTE:
For all subs facing the interior there is an allowance for a 2” inch beauty plate
Tweeter will not be counted as speakers.
Compression drivers/wave guides will be counted as a speaker
3 WHEEL SHOWDOWN SOUND COMPETITION RULES
No buybacks due to the number of competitors and time constraints. The practice of charging participants to continue once eliminated will not be used.
Each Slingshot must be registered with the correct Class (FW, LW, WW, MW, HW, EXTRM)
Each participant will meet at the host table to randomly draw numbers to see what order they will enter the ring to compete. All Grudge matches will be after the Event.
It will be up to you to ensure you are logged into your equipment i.e. (Radio/DSP). Please log into your equipment prior to entering the ring.
Once you've pulled into the ring you will have 2 minutes to address technical issues. If you are not ready to compete after 2 minutes, you will be disqualified.
Each Slingshot must be able to pull in and out of the ring under its own power. If you cannot drive in or out of the ring, your Slingshot WILL be disqualified.
Clipping is an AUTOMATIC disqualification. A CLIP is any interruption of sound from your Slingshot audio. This includes loss of sound from one or more of your Slingshot systems (Tweeters, Mids, Subwoofers). * A majority of the judges judging the bikes have to hear the clip. If you receive a text or call during the competition you will be disqualified.
If a judge finds you have clipped, he/she will have the final word. Any argument will result in immediate disqualification.
Tunning (adjusting DSP, EQ or Crossover) during the competition is prohibited and will be an immediate Disqualification. Adjusting a bass knob or volume will not be considered tuning. If a judge finds you were tuning or someone else in the crowd is tuning, you will be disqualified.

SECTION 7: GENERAL RULES & AUTHORITY

7.1 Inspection Authority

Judges may inspect any vehicle at any time.

7.2 Reclassification

Vehicles exceeding limits may be moved up to proper class.

7.3 Final Authority

The show director’s interpretation is final.

Can-Am Sound Competition Rules

Lightweight- up to 3 speakers (1 MB or sub no larger than a 10”)

Middleweight- up to 5 speakers (1 MB or sub no larger than a 10”)

Heavyweight- up to 7 speakers (2-8 MB or subs or 1-10” MB or sub)

Tweeters do not count

Extreme- (unlimited speaker count)

Ryker Sound Competition Classes

Lightweight- up to 3 speakers (1 MB or sub no larger than a 10”)

Middleweight- up to 5 speakers (1 MB or sub no larger than a 10”)

Heavyweight- up to 7 speakers (2-8 MB or subs or 1-10” MB or sub)

Tweeters do not count

Extreme- (unlimited speaker count)

* NOTE Individuals competing in the regular classes can compete in the modified class with the same speaker count or higher. Winners from the regular sound categories can compete in the modified class in which they won without charge.