Thinking about blending old school preamp with Tablet
I like the idea of using my Samsung Galaxy Tab Note 10.1 for navigation and music playback but I don't want to do a permanent installation. I have 3 different older BMWs I use on a rotating basis and don't want permanent installations in any of them. I am thinking that a good quality preamp with tone controls and an aux input would allow me to keep the OEM radio and integrate it with a tablet. I actually have a really nice old Precision Power preamp with very good sound quality but that has been out of production for >> 10 years for anyone else that may want to explore this route. The only currently available preamps I am familiar with are the Audio Control Three.1 or Four.1. There are other models available out there for much less money but I have no experience with any of them. I think the key thing to look for in a preamp is a DC-DC switching power supply. This will help tremendously with noise rejection and have more voltage output capability than a preamp with simple 12 VDC power directly from the car's electrical system. Both the PP unit and the Audio Control models have DC-DC internal power supplies and ~ 9 VDC output drive capability.
With the Samsung Galaxy tabs, a good quality USB DAC can be used to convert the digital data for the analog aux input on the preamp. I will try using a stalk mount for the tablet that is bolted to the passenger seat front left bolt.
The idea is that I would have stalk mounts in each car and a preamp installed in each car. I would just move the tablet from car to car and never leave it in a parked car for prying eyes to see. I already have all the pieces I need to do this install. I just have to find time to do it and post pics and a review.