Our amps, with the exception of the TX600, LX5500, LX8500 and Kilo, are 2 rack spaces. Any 2U+ Unit rack case will be satisfactory, but always be mindful of where the vents are placed on the amplifier.
The lightweight TX600, LX5500, LX8500 are not designed to be rack mounted an come equipped with a convenient carry handle.
For the Hartke Kilo, a 3U+ space rack is necessary.