2020 Judging Criterea

  • Sound Linearity

    This is the section that judges will determine how well balanced the system sounds at moderate and higher volumes. A system with a good linearity will sound equally balanced at all levels, remaining accurate, tonally and free of distortion of any kind. Volume control is very important, it will ultimately impact participants score.

    (Participant may receive 0-5 points each round)

    Note: Distortion from overly high volume will affect points in this category. This is contest is about sound quality. High volume should not compromise the sound systems sound quality.

  • Tonality...

    Tonality: This is the section which judges the spectral balance and tonal accuracy of a sound system. The sound system must have the ability to give the musical instruments and vocalist a natural sound. Judges must be able to differentiate the various sounds in the music track, this is accomplished by having good tonality. Sound production must be accurate, ex. The attack-decay of a kick drum or cymbals from a drum kit should be accurate as if you were at a concert listening to your favorite band. You should not only hear the music but also ͞feel the music.

    (Participant may receive 0-5 points each round)

  • Song/Track Selection...

    Song/ Track Selection: This is the section which judges will determine if the song/track selected is one that compliments every aspect of the sound stage. Participants should select a song which allows every aspect of their system to perform well. A quality version of that song should also be selected as well.

    Note: In the FINAL round where finalist are asked to play their own song(s) and a song(s) from the SOS Playlist, participants will ONLY be judged in this section based of their individually selected song. The SOS selected song will not have any weight in this category.

    (Participant may receive up to 0-5 points each round)

  • Volume Control

    Volume Control: Participants will be judged on volume control. It is imperative that each participant is knowledgeable of their audio systems capabilities. Each venue may present acoustic variables which will test the participants ability to make the proper adjustments. Volume control can be affected both by too high or too low volume.

  • Sound Stage Speaker Placement

    Sound Stage Speaker Placement: This is the section which judges will determine if the sound stage has balance. The sound system must be balanced. In the event the front stage has less speakers than the rear stage, the participant must plan accordingly that they create the best possible balance.

    Note: Songs selected should highlight the system overall and the placement of the speakers allowing the music to sound balanced.

    (Participant may receive up to 0-5 points in the PRELIMINARY ROUND only.

  • Creative Design

    Creative Design: This is the section which judges will determine the craftsmanship and neatness of the sound system installs. Things such as fiberglass work, lighting, pods, wiring, functionality, etc. will be accounted for in this section. I

    Note: If you have custom tour pack, saddlebag work, etc. make sure this is presented to the judges, so that you may receive all points possible.

    (Participant may receive 0-5 points the PRELIMINARY ROUND only)

    (Participant may receive 0-5 points each round)

    Note: Heavily explicit song selection will automatically result in a ½ point deduction from your final score. One (1) warning will be issued.

  • 1 Each bike will be registered at the SOS registration table with all proper information. It is the participants responsibility to assure they have provided the registration table with the correct information including class. Refer to “class” section on the TMC website.
  • 2 In the preliminary rounds judges will allow participants up to 90 seconds with a minimum of 60 seconds.
  • 3 Depending on the amount of participation in each class will determine how many bikes will be in the ring. Traditionally (4) motorcycles will be in the ring during each heat.
  • 4 You must have the SOS songs downloaded on a device and/or have the ability to search the web to obtain them. The judges MAY utilize a song from the list to break a tie. For those who arrive without the songs, please have USB or Bluetooth capabilities or risk being DQ'd.
  • 5 Registration cut off times will be strictly adhered to unless exigent circumstances arise, which at that time will be at the discretion of the SOS staff.
  • 6 Judging will be based on a series of things but not limited to bass, treble, clarity, song selection, volume control, speaker staging, etc. We are listening for quality sound systems.
  • 7 The motorcycle must be able to ride in and out of the SOS ring. (NO PUSHING)
  • 8 In the finals round, each participant will have one minute to play song selection(s) Of their choice and then transition to the selected song from the SOS Playlist. The judges will then score the participants for a final score to determine a winner.
  • 9 Compression horns WILL be counted as speakers due to the frequency range they are able to play i.e. Horns with waveguides and diaphragms. (See photos)" The smaller "dome" style tweeter, Hertz ST25,etc. will NOT be counted in the speaker count. (See photos)
  • 10 Clipping will count as an immediate disqualification.
  • 11 Participants to assure the contest moves efficiently, please make sure you are with your motorcycle when called to the lanes!!
  • 12 CHEATING Rule - if any participant is caught in violation of the requirements listed for the entered class, they will be immediately disqualified from the competition. It is the right and discretion of SOS officials to conduct a reasonable inspection of the participants motorcycle within reason.
  • 13 Tuning - During competition participants will only operate the volume on the main source I.e. Radio/ Bluetooth device/ cell phone . The use of a bass volume knob may also be used. Tuning/ adjusting of crossovers, DSP, equalizers whether onboard or Bluetooth will be prohibited.
  • 14 Technical Issues: Each participant will have (2) two minutes to address any technical issues while in the ring. If the participant is unable to fix the issue he/she will we asked to exit the competition ring. The participant may return to the ring after all other participants in that class have competed at which time they will be given the opportunity to be scored. The participant will receive a FIVE (5) point deduction from their overall score for that round.

SOS Featherweight Class- Pounding the ground and your ear drums

  • Requirements:
  • Maximum of 6 speakers
  • No sealed bags
  • No speaker larger then 8”
  • Compression horns COUNT
  • (Lids can be sealed off with a baffle design or similar to avoid cancellation)

SOS Lightweight- Don’t let the word “LIGHT” fool you!!!

  • Up to 8 speakers NO speakers bigger than 10"mid.
  • There is a total of (2) 10” Speaker limit in the lightweight class. This includes in the saddlebags or tour pack i.e. (Voodoo tour pack or similar)
    (Refer to the photos for an example)
  • Saddlebag lids may be enclosed to separate the lid speaker(s) from the saddlebag to avoid cancellation. You must be able to open the lid for an inspection. (Refer to photos for an example)
  • Tour pack enclosures are permitted to be sealed.
  • Saddlebags walls MAY be reinforced with fiberglass, sound deadening material etc.

SOS Middleweight- A notch or two above stock… OK… about five notches above stock…

  • 9-14 speakers with a subwoofer/ Mid-bass restriction. (Read Below)
  • You ARE permitted to have the following saddlebag enclosure restrictions:
  • (4) Four 8” subwoofers/ Mid-bass (Ex. Two (2) in each saddlebag)
  • (2) two 10” Subwoofers/ Mid-bass (Ex. One (1) in each saddlebag)
  • (2) two 12” MID-BASS (Ex. One (1) 12” mid in each in saddlebag NO SUBWOOFERS)
  • Tour Pack speaker restrictions: You are allowed the following (4) for 8”, (2) two 10” or (1) one 12” Subwoofers/ Mid-bass speakers will be allowed in the tour pack. This is in addition to whatever combination you have in the saddlebags.
  • Ex. (1) 10” in each saddlebag + (1) 12” Sub/Mid in the tour pack
  • Ex. (2) two 10' subs/mids total in the saddlebags + (2) 10" subwoofer/mid i the tour pack.*
  • Tour pack must be to manufactures specs. No oversized Tour packs**
  • Participants MAY NOT widen saddle bags from manufactures specifications.
  • Participants are permitted to alter the saddle bag mounting options i.e. rails etc.
  • Participants are permitted to mold side covers to the saddlebag to make ONE piece as part of your build.



  • Unlimited speaker count/ Unlimited Subwoofer count
  • This is a class designed for the highest level of motorcycle audio competition.
    Saddlebags may be modified but must maintain the design of a touring motorcycle.
  • This includes: Molded side covers, widened and stretched saddle bags, wood bags, fiberglass bags, modified saddle bag lids.
    (Must be road worthy rideable motorcycle. No rolling jukeboxes)

    • Trikes
    • Cycles with side cars
    • Heavily modified motorcycles
  • If you have a saddlebag speaker enclosure you will be in the middleweight or heavyweight class depending on your speaker count and setup.**