I am in the process of finishing up a 24v Aikido preamp and am considering using your Remote Alps module for a volume control (Assuming its still available for DIY'ers) . My question is whether or not it can be powered via the 24v wallwart that i am using to run the Pre-amp or if i need a second lower DC power source ? The info on your website has me a bit confused. One page says 8vdc-24vdc and the download for the module says 8vdc-15vdc. Thanks in advance for your time.