Interested in sound-off events? Here are the three largest sanctioning bodies in the United States.

	International Auto Sound Challenge Association (IASCA)
	United States Autosound Competiton (USAC)
	dB Drag Racing dB Drag Racing is a form of auto sound competition where competitors compete against one another to see who has the loudest car stereo system.

More competition events and organizations:

• AudioSports Sound Challenge Series.

• db Drag Racing Belgium.
• dB Drag Racing Norway/Sweden.
• Hellenic (Greek) db Drag Racing.
• MECA is the official MECA website.
• NSPL is the National Sound Pressure League.
• ShowYourSound Netherlands is the CarAudio site of the Netherlands.
• SLAP is an organization that is nation wide and has similar rules to IASCA. SPL and SQ are both represented in this organization.
• Whitlee.

Competition clubs and competitors:

• clubdefierrosyaudio is an Argentine car audio club.

• Irish Auto Sound Challenge Association Information on the Irish sound-off scene.

• LOUD!! Association SPL resource for the UK-based car audio competition organization.

• National Car Audio League Official source for NCAL.

• Team Gates Official resource for db Drag competition team.

• Driven By Sound Car audio organization and team offering members event coverage, weekly discussions, community activities and family environment.

• East Coast Choons Team of British car audio enthusiasts sharing their knowledge

• Sound Syndicate Auto Club Car audio competition events in local communities

• Team AMP Official team's site with resources, articles, discussion forum

• Team Pitta Page Dragracing competition car stereo.

• Team ROCS A worldwide organization dedicated to promoting car audio and providing accurate, helpful information to enthusiasts.

• Team Synthetik  provides reviews and news covering car audio scene.

• Team XS Car audio team with install galleries, forum, chat, member classifieds and product savings with membership.