Maxxsonics Product Registration and Extended Warranty Service

To register your MB Quart, Hifonics, Crunch or Autotek product you will need to validate your product's serial number below.

If you are registering an amplifier, it may qualify for an extended warranty, if it does, you will be forwarded to our Extended Warranty registration site where you will have the option to register your amp or purchase a Maxxsonics Extended Warranty.

If you need help locating your serial number, click here >

Product Serial Number