Eilif, your view on amps are misguided. To increase your signal by 1 db( or 1 s unit) you have to multiply power by 4. so from 100 watts times 4 equals 400 watts. Running 100 watts or 200 watts doesn't really make a difference. People just think it does and it makes me sad. lets see here... 400 times 4 = 1600. More than legal power. so if you were to run full power compared to 100 watts you would only have a signal increase of about... 1.8 s units beams will increase your signal about 3 s units for every element. A much better way of increasing your signal YOU DONT NEED AN AMP!!!