How would it be the amp though? What i did, we literally did spend 3 hours tinkering with it though, i did not realize it until i had to call into my work and tell them i'll be an hour late lol. But i tried literally everything i could with the amplifier, I set everything wide open. Set the lpf at whatever thousand, and high pass the lowest possible, i assume 15, and then used the controls from the maxxlink. The week before, i had tried everything with the soundigital itself with no good results. Only way to block the voices without the maxxlink would be from the headunits low pass filter. Only thing i thought could be wrong would be the filtering, but thats why i asked him to pick up that maxxlink, plus to make other things easier not to mention the bassknob with clipping indicator. I was assuming that it being a full range amp, it was getting higher frequencys and throwing the sub off completely, but with the maxxlink plus the headunit low pass, i'm not sure anymore at all. I'm giving him hell not to send it in, until we KNOW somethings wrong, because i could definitely see them not being able to recreate our results. I really think its something we're doing wrong, even though we're tried **** near everything thinkable. The maxxlink did help the sound though, the extra filters, just doesnt sound good at all right now, and i really don't think it's a damaged amp, i really was just assuming theres some sort of trick or normal different way of tuning these.