Move to a warmer location... Seriously though.. "Actually I am serious". The electric blanket thing is a good idea. The new electric blankets are 'much' safer than the old ones and they are relatively inexpensive to boot. If you purchase an electric blanket make sure you know the maximum 'watts' it uses then if you don't have a "power inverter" already, purchase an inverter (300 Watt inverter) should be sufficient - but it will have to be enough watts to drive the Electric Blanket. When you go on a Gig simply wrap the PSR 2100[s] in the electric blanket, plug the cord into the Inverter and plug the Inverter into the Cig Lighter in your vehicle. If you use the electric blanket in a house to warm the PSR 2100[s] it would be even more convenient because you don't have to worry about an Inverter to plug it in and use with your Keyboards.

PS: It's a good idea to NOT leave the electric blanket on overnight warming the Keyboards but if you do make sure the "Temp Gauge" is not set too high.

Best regards,
Mike