Does anyone have a birth sheet for an Alpine MRV-1507? I always wondered what they would really do. I've always just assumed they would do their 14.4 volt ratings since I have a couple of their smaller amps and that's what they do. So I assume it would be pretty realistic to get about 900 out of it at 4 ohms? I love these old Alpine's and I'd like to pick one up. I'd just like to know what it's really capable of.