Busted Bass adjust knob, no wireless tested, passing audio.
The Liberty 6000 from Anchor Audio is a powerful portable PA system that operates on an internal rechargeable battery, or on AC power. It features 1 built-in wireless microphone receiver, multiple inputs for wired microphones, and a built-in MP3 player. It's an easy to transport PA system that sets up quickly.
The Liberty system was designed to be a great sounding PA system that anyone can use without training. Its internally rechargeable battery enables you to use the Liberty for several hours away from a power source. There's a lot of useful features built into the Liberty, like the wireless microphone receiver, the battery status LEDs, and the full-featured MP3 player.
The built-in MP3 player features an SD Card slot, a USB port, and a mini-plug input. You can save some MP3 files on an SD Card, load it into the slot, and play them from the Liberty. You can set the songs to repeat, and activate a "ducking" feature that will fade down the music when you speak into a microphone, and fade it back up when you stop speaking. This system is covered by a 6 year warranty, and has been fine-tuned over the past 20 years to be the ultimate solution for a user-friendly portable PA.