Hello all you helpful Customforgers, I've got a new query that I'd like some thoughts on. Since I decided to blow the dust off my guitar last year, I've been playing on a Roland Cube Lite. This is a solid state amp with 2 distortion channels powered by a proprietary 5.7 volt DC power adapter. The thing is that outside of the clean channel, with all gain turned down, it seems to suffer from almighty hum/buzzing. The more distorted you go, the worse the hum. I always thought that this was down to my guitar having P90s rather than humbuckers. However, I just tried out my girlfriends crappy Elevation EG-10J which was bundled for under £100 with a cheap guitar from Argos. I'm guessing it is also a solid state amp (given that people are selling them on Ebay for £15!) but this one has a 'proper' power supply - i.e. an plug and lead that are in no way detachable from the amp itself. To my surprise and horror, the buzzing is massively reduced from my more expensive Cube Lite - even when the overdrive is engaged and even with my P90s on my Gibson. I don't like the tone though so I think I'll be in the market for a new, cheap practise amp. Can anyone confirm or deny my theory that if it has an 'inbuilt' power supply, it'll be quieter on the buzzing front? Many thanks!