The "line" position is normally used for music sources such as a CD or Cassette player. If your microphone comes equipped with an RCA connection then you’ll be able to use this to connect to your TV. The viability of connecting a mic directly is never an issue if you have a dedicated external amplifier. The mic is Low Z and receiver inputs are all High Z. Connect the microphone cable to your mixer/preamp at input one. The audio amplifier circuit needs 6-24v as per amplifier specification. What if this doesn’t work If your microphone and TV won’t connect directly, then you’ll need to use an intermediate device. However, there are other ways around this, which I’ll cover in more detail later. Use the "mic" position. Hi, I'd like to hook up a microphone to my Pioneer A209R stereo amplifier. So you connect the mic to a mixer with XLR inputs and then you connect the audio out to an analog input on your receiver. I've done some googling and understand I need some kind of microphone pre amp or mixer. You may have a "line" or "mic" switch above the volume knob or slider. The amplifier … If it doesn’t have the right input, chances are you should be able to connect a microphone to your speakers or another device with an amp. However current is drawn equally from the live and neutral leads to power the amp in the microphone, the ground being the return connection. It has 6 line level inputs. Nevertheless, if you are adamant about achieving such a mic-to-speaker direct connection, you can follow the steps mentioned above. Connect the positive terminal of the mic with 10 k resistor in series with the positive supply and the negative terminal of the mic is directly connected to negative supply or ground. As a general rule: Always connect your mic(s) first, before you turn on phantom power. You can simply hook the mic to the amp before routing the amp’s signals to the Speaker. This is called an amplifier or mixer. Therefore, we must connect the microphone to an amplifier, have the signal amplified, and then connect the amplified signal into the arduino. Also, never put anything between your mic and your microphone input. Best option in this case is to get a small mic preamp like the M-audio AudioBuddy. Hot plugging while P48 is already activated can harm your mics. Some audio interfaces don’t have a hardware switch, at all; instead you must activate phantom power via their control software. Most AV receivers are built to make things really easy for you, so connecting a microphone should be of very little problem. So in order to build our circuit, we will use a microphone and connect it to an audio amplifier to get amplified signals. I’m assuming your amp does not have a preamp/mixer stage and you do not have access to a mixer unit.