They can operate up to 2 ohms in stable mode and operate in class A/B. Class "A/B" amplifiers are known to reproduce excellent sound quality and at the same time work with better energy efficiency than pure class "A" amplifiers. Boss has developed a specific linear circuit that further reduces distortion while increasing both audio quality and power.
They have a thermal protection that temporarily switches off the amplifier if the temperature is too high. They are also equipped with short circuit protection, so if a speaker shorts, the protection circuit will inhibit the output until the problem is solved.