I put two 2500d's on my Memphis Mojo 15's @ .25 and had no problems. I also put four 2500d's on my Mojo's @ .5 and "only" gained 1.3db from 155.9 to a 157.1 (AC190) off four extra batteries
so yes they will play @ .25 but only for burps and you may have to roll the volume (but I didnt, and is it called a burp if you roll the volume??? hehe)
i ended up going with a memphis. i think 4000w at 1 ohm is enough for me. i dotn see mysefl wireing this bad boy down to .25ohm nominal even for burps. but itll do the trick at 1 ohm for me......