Originally Posted by
Euphonic
Hey, me too.
This might be an unpopular opinion, but I dislike amp dynos. They don't serve much of a purpose in the actual use of the amplifier. For example, I'm happy your amp will do 1000 watts at one frequency with a resistive load, but how does it actually perform on a reactive load in the bandwidth you need it to play? Let's look at the Rockford Fosgate T2500-1bdCP (which is the amp I assume your buddy has). Per Rockford, it has a dynamic power of 2940 watts @ 2 ohm and 2980 watts @ 1 ohm. They also state that it's 77.7% efficient @ 2 ohms and 64.5% efficient @ 1 ohm. With those numbers, there is simply no reason to run it at 1 ohm. Another spec listed on their site is that it's max current draw with a sinewave is 350 amps, while it's average current draw with music is 175. So, if it outputs 2980 watts with a tone, it will average 1490 watts with music.
There's no way to predict if the system you're planning will give you the end result you're looking for. I've been in vehicles that hit a bit over 150db on a meter, but sound louder with music than others that were in the low 160's. The best advice I can give you is to buy quality gear and use it as intended.