I bought a 10W7 and a JL500/1 and it sounds great and load. Then a friend brought his truck over and we installed his 800rms RF amp. WOW it got so much loader. At first i had a 250/1 hooked up to it. once i added the 500/1 it got about 30% louder. With the 800rms RF it was just as much (30%)...