I just read some posts on the beringer A500 for like $200??  I can get more than that out of my D1200's used.  I have 5 D1200's and 2 D1150's and one 6 channel 700 watt Proton amp.  I watch ebay and when I see a good deal on the D1200 I buy it.  The problem is I think Proton is belly up?  I can't find any info on the D1200 or a website to find the specs.  I am not unhappy with the Proton amps, just thought maybe an upgrade would yield better sound.  Maybe not?
Anyone know if Proton audio is still around?