I am trying to put a small PA system together for an event I have 2 times a year. I have a Stereo receiver that I take to the event to play music. It has the typical audio input jacks on the rear. However, it doesn't have a microphone jack. I have been looking a Nady DKW DUO Handheld Microphone System. The output on the back of it's receiver is 1/4" unbalanced audio output. In doing a little research, it seems that I need to use a pre-amp to get the signal strength high enough to connect it to let's say the Tape input on my stereo. So here are the questions: 1. The Nady system offers a Style of - Channel B/D or P/R? What is the difference? 2. Do I need the pre-amp? 3. Would the ART Tube MP Studio Mic Pre-amp with 1/4" input and output work. I would use a 1/4" to RCA adapter for the connection to the stereo.