I'm planning to start building 2 x 4-channel amps for my Orions shortly. I've been using them with Alesis amps since I finished them and they sound great, but (a) there is a bit of low level noise (not audible during music but I know it's there) (b) I'm interested in testing out Linkwitz' assertion that all reasonably competent amps sound the same with Orions (c) I can save a bit of space and increase WAF by getting the amplification into two smaller boxes, and (d) I fancy the challenge. I've just completed a 41Hz Amp 6 kit to check out my soldering is up to the job and it sounds surprisingly fine with a pair of little Tannoy 603's I picked up off e-bay. So... the plan is to do this with 4 LM3886's per side (1 each for treble and mid, 2 for bass), and seperate trannies/power supplies for bass, mid and treble. I'm going to use the 'CarlosFM' circuit (see [URL]http://myweb.tiscali.co.uk/nuukspot/decdun/gainclonesnub.html[/URL]) for the amps and 'snubberized' power supplies with increasing amounts of capacitance going from treble to bass. There will only be around 60w per channel driving the Pearless 10" XLS drivers, as compared to the 150w currently, but SL is adamant this is plenty when they are driven directly with no intervening crossover, and that it avoids any dangers of bottoming at high volume. So I'm going to give it a try. I can always go for some bridging/paralleling if it seems like they need more. So... any thoughts, suggestions or cautions? (Not a whole different approach though please.) And... I'm thinking about going the whole hog and making some aluminium enclosures from scratch, so does anyone know where I can get some suitable heatsinks? Or alternatively any suggestions for where to get waffy but reasonably priced boxes? Cheers Gordon