I currently have an Ashdown ABM 4x10 cab running on a borrowed Peavey 180watt head - so I'm looking to buy my own soon. I was looking around at normal bass heads and wondered if it'd sound OK just using a normal power amp. The amp in quesion was an Alesis RA500 http://alesis.com/products/ra500/ This could supply my cab with 500 watts of power at 8ohm and looking at the frequency response its not going to colour the sound at all. Now if I used a preamp with this, for eg the Bass VAMP Pro, I could run my rig off this, correct? My final question is - would it sound any good? My main point of doing this is to save money and get more Watts for the old £££s, as that power amp would cost me around £200 whereas a decent bass head I'm looking at £400-500 for that ammount of power.