Quest STM2Z+ Rackmount 2 Zone Strip Mixer with BluetoothThe STM2Z+ is a simple but versatile preamplifier, offering a multifunction solution for installations where multiple voice and music sources need to be mixed to two output zones. The stereo design with ten inputs allows connection for any type of audio source such as microphones, Bluetooth devices and various balanced or unbalanced line level audio sources. Channel one to four are balanced inputs, allowing connection of microphone and line level