Hi, I'm planning to get an Alpine ida-x305s hu and a Mcintosh 50w x 4 amp. I'm probably going to go for Scanspeak Revelators. Is it ok to use just 1 pair of tweeters in the front and 1 pair in the back with 1 sub. I can use the crossover in the hu, right? Are mid or mid bass drivers really sufficient? Thanks.