I wanna see a 4,000 watt amp! And more to the question, I'd be more worried about a 40 watt amp than a 4,000 watt amp driving a speaker rated at 800 watts.

The Samsung system on the left makes 1,000 watts, the Pass amp on the right just 100 watts. Really? Steve Guttenberg In a perfect world, all 100-watt-per-channel amplifiers would be equally powerful.