I take that back. there's 6db for the xa30.5, but measurements of the xa100.5 were less than 200w total
http://www.hometheaterhifi.com/power-amplifiers/power-amplifiers-reviews/pass-labs-xa-1005-pure-class-a-monoblock-power-amplifier/page-4-the-pass-labs-xa-100-5-power-amplifier-on-the-bench.html
so I'm not sure what the xa160.5 can do
http://www.hometheaterhifi.com/power-amplifiers/power-amplifiers-reviews/pass-labs-xa-1005-pure-class-a-monoblock-power-amplifier/page-4-the-pass-labs-xa-100-5-power-amplifier-on-the-bench.html
so I'm not sure what the xa160.5 can do