Ok. The modulator has a mic input located on the front panel. On the rear panel is a mic (male) wire. So my mic gets plugged into the front panel. Then I assume the male mic wire in the rear plugs into the radio. Am I right so far ? Ok. Now I assume it pointless to use this with a power mic. So how much better will a demco and unamplified d104 work compared to an amplified d104? And from what I've heard from others there's no comparison between an amplified d104 and an UN amplified d104 with a demco hooked up to it. I was told the Demco with the unamplified mic sounds much better. Why is this? Is it because the Demco is amplified useing tubes as opposed to the transistors used by the amplified 104. Everything I've said here is speculation on my part. I'm just trying to learn from people who have first hand knowledge of this type of modulator.