I've had my Scout running off of a P300 for a year with no problems. The only thing you have to remember is that you must switch back to standard 60hz. waveform before turning on your turntable if you've been using multiwave for digital listening. In your case though, you want to plug your SDS controller into the P300. I'm not sure what, if any advantage, you'll gain from doing this. If the SDS stays powered up all the time, you'd want to consult with VPI and ask them if you would be harming the unit. You most likely would gain from powering the Lehmann from the P300. Every front end component that I run through mine evidences positve improvements.
