I was wondering how this PA cab: http://www.loud.net/jbl/SRX/4718x.html would sound with either a 410, or 210 stacked on top? Freq. response is 38-300. I would bi-amp it with my Ampeg B4R and dial in the appropriate crossover frequency. The reason I ask is that they are fairly expensive cabs to buy new, but I know where there is a like new one for 299 (maybe lower). Is this going to be mud city, or a well defined loooow end? Thanks.