Conclusion: I bought the M109 for marine application (main stereo system for 33 ft. sailboat). The installation wasn't overly taxing and the wiring was labeled well and easy to follow. I'm pushing the signal through some old Pioneer speakers from years ago but the sound is still solid.
Wingnut 2 from St Thomas Ontario, Canada, Sonic Electronix
14 July 2014
Conclusion: After reading the other reviews on Sonic I chose the M109. The price is right and the other features sold me. I like a rotary knob this is old school for the volume. I do not like effects or standard settings. I want to customize the bass, treble, and fader to match my speakers.
Conclusion: I installed this stereo in my boat (which was very easy); it was an upgrade from a cassett player. I am very pleased with the M109 series; it drives four (20 watt RMS) speakers with clear and robust sound and looks very cool in the console.
Conclusion: Good radio, bought primarily for the AUX port so I could use an iPod and get rid of all the CD's in my boat. No problems and it was a direct replacement for the Clarion that was in the boat.