Afraid that year has been passed lol...but he had that alt and had a 2600 Hifonics pushing (2) Cerwin Vega Stroker 15s, with a extra battery did fine.
Decided to upgrade to a RD Audio D9 on a pair of FI BTL 15s, added more batteries and the alternator still could not matain the voltage. It took a dual alt kit from Mechman, plus another 200amp model from them along with the DB Electral to matain a steady 14.4 at idle, and after that lowest he would drop was 13.9 on music.
With just the DB alt, he was dropping in the low 11s. I was considering them myself for a while, before I found out the issues he was having.