I had a Concertone ZX25 in my 2010 Wildwood XLite that was not working more than it was. I finally took the plunge and changed the head unit out for a Pioneer FH-X721BT. What a difference!!! Both units are AM/FM/CD with an aux jack but the Pioneer also has a usb connection, has bluetooth, came with a remote and has a neat multi-coloured display. The Concertone was mounted vertically while the Pioneer (a standard automobile unit) mounted horizontally - which required fabricating a wooden face plate to fill the hole. The reception went from 2 weak stations to about 6 strong. Should have done it sooner!!!