Xenonman in Bluray.com I have taken pictures of my Home Theatre and have an extensive amount of the 7500 with the lid off. Those transformers are absolutely huge and the amount of heatsink is massive, as well as the capacitance. The 300 watt rating on 4 ohms is conservative. This amp in 8 ohms has been bench tested at 240wpc all channels driven at Outlaw's .03 THD rating. The 7500/7700 amps are practically invincible and contain seemingly unlimited power.