Orion louder than 20.1'sprobally a used 20.1 Nice amps for the money...I use to have 4 of them...I only have one now....
It'll burp at .25 but takes enormous amounts of juice .5ohm no problem i used to burp 1 orion @ .25 when i had both my orions and my 2-12" power hungry old subs..25 ohm just seems too low on the Orion....I'm sure it can do .5 ohm burps