I bought a Cobra hand power mic I don't know the model number but it is a 5 pin for my 148 side mount plug The Cobra 148 is a 91 approx. made in Malaysia. I can't turn it up at all with out it squealing bad. My stock mic is louder than this power mic because I can barely open the dynamic. I have grounded my antenna mast and ran a wire from the chasis of my radio to the ground on my power supply still no change.