Hi! Is my first post here. First i want to say the forum is great and ive learned very useful things with your experience. Keep up the great work guys. Second my question. A live in a small country and a local store is making progresive discounts in his products. im starting my first band with my friends and we are looking upgrade our PA cabs with 2 of these: http://www.samsontech.com/samson/products/pa-cabinets/resound-hd/rs215hd/ This cabs are 600w, 4 ohms as i can understand. Actually we have a 4 chanel amp, with 4 omhs minimum, 75w for chanel. The model of the amp is pm42e, but the brand is doubtful, and change his name across countries, making hard gathering true details. Actually we are running 2 150w, 4ohms cabinets. my question is, if the info is correct, can we get more loud(with a bigger amp) with our actual cabinets? and how much power we need to give to the samson cabs to reach their 100%? Usually i read a lot but with the progresive discounts the time work against us. thanks in advice.