The TGA-7401 is a true 7-channel amplifier that offers a relentless 7x400 watt profile and is the most powerful amplifier in its class. Sunfire developed its exclusive Tracking Downconverter™ technology for the coolest, most reliable operation no matter how hot the performance gets. This is Sunfire Optimized™, a powerful program that ensures the new amp is designed to perform optimally with other Sunfire electronics and our wide assortment of speakers too.