Ampeg say the svt-1000, svt-4 and others much power work perfect with 410hlf, 610hlf etc... Yes, svt-1000 is a more power than the 410hlf or 610hlf, it's "normal" to fart, but my svt-1000 work really perfect with a svt-15, no fart, only lot of boom!! and svt-15 is 200 watts! He don't seem to...