Summary: OVERVIEW -------- This is a fine deck audiowise. It's solid, the sound is nice, and you get three pass filters you can play with, front, rear, and sub. I have no complaints with taht aspect of the deck. The onboard amp is plenty powerful for after-market speakers, and fine with your original speakers too. The USB device will read your mps or AAC files on any thumb drive or other flash media.
Summary: installed my dpx502 last week. have been playing with it. i bought this mainly for the front usb port. i plug my portable mp3 player in it and this receiver sees it as a drive. this works like a champ. very intuitive ui. traversing through the folders and files is quite easy. although, it uses generic names (i.e. folder1, folder2) instead of the folder names (i.e. artist names) on my mp3 player.
Summary: I had this unit fitted to an 07 Vectra to replace the factory fitted double Din unit along with the Kenwood OEM steering remote adaptor and fascia fitting kit. The reason was to provide mp3/ wma/ aac file playback and ipod connectivity via the the optional accesory lead. After a lot of problems with the supply and fit company, initially arriving with the wrong (Corsa) installation kit, the unit eventually fitted the Vectra dash.