I have a PDX-1.1000 and I would really like to try a Sundown sub for the first time. Can I run the 1.1000 to a single SA10 in a ported box? Will it handle all the power from the amp?

It will work fine, you have a gain knob for a reason.

IF you know what your doing... yes.

if you do not.. then no.

someone that know what they are doing can send that sub up to around 3k.... but if you dont know what your doing you can blow the sub with as little as a 100 watts,

IF you know what your doing... yes.

if you do not.. then no.

someone that know what they are doing can send that sub up to around 3k.... but if you dont know what your doing you can blow the sub with as little as a 100 watts,

Its those u-tube videos. They dont say how long the sub lasted.

Got it. Thank you.

Next question, the enclosure is going to be mdf/fiberglass so I will not be able to do a slot port. I couldn't find the specs for required airspace? And any recommendations on port size and length?

You Could Slot Port A Fiberglass Enclosure, It's A Pain In The Fuckin' Ass And It Takes Time And Dedication, But It Can Be Done With Great Results.