I bought the SC PT450 Panasonic surround sound system about a year ago. They have since bought a model out with a docking port but it's just the same as the MP3 input mine has.
This system is the mutts nuts. It scares me to turn up the volume. I've been a clubber most my life & wished their PA systems were this crystal. It's great for annoying neighbors & even people living in another street, it's that sweet.
I have this hooked up to my PC / HDMi to my TV / MP3 & as my PA system for my drum machine / midi synth / vocoder & special effects gadgets. I paid £140 from Currys & it still to this day sells for more.
If you want reliable nightclub sound then you have got to buy one of these systems. I plan on using this to do gigs is how good the sound is. The best value kit your hard earned money can buy. Just fit thicker speaker cable is my tip & keep the volume below 30 if you don't want the police at your door for disturbing the peace.
This will be a classic one day & if you find one cheap, snap it up or I will.