A power supply is a power supply – what's there to say about it – and then it costs as much as a model blue. Is the developer crazy? You're absolutely right. But only in principle, and the developer didn't come up with this little gadget just for his own pleasure – after all, a lot of development work goes into a product like this and, especially with this product, there is a big financial risk involved. The developer must have been very confident in his work.
And of course, he also knows, that it's almost impossible to describe an obviously superfluous and expensive product like this, which ultimately appeals to emotions.
That is precisely my problem. But so far, no model PS 300 that has been loaned to a customer of a model Blue or a model Surzur has been returned. Obviously, he wasn't so wrong with his idea of developing such a device after all.
Wolfgang Kemper, an editor at the German magazine HIFI Statement, described it this way: if you don't know a model PS 300, you're not missing anything; if you do know it, you won't give it back. Now it's your problem.
* Can be combined with model Blue and model Surzur