Two questions: I'm going to start making my Adire Tempest sealed mid-q project soon. However, I was wondering if there is any other amps that could be suggested besides the Parts Express 250w plate amp (which is what I'm looking at buying right now). I understand that the 250 should be fine for me, but I was wondering if anyone has had great results with another amp for around the same price. Also, does anyone have any more info on the 'rumble filter' on the amp? What frequency does it kick in? What kind of rolloff is it? Do the people here think it's generally a good thing? Thanks in advance.