i traded a cobra 148 for a jcd201 mic a few years back. i spoke to the dealer in KY that was pushing these big time way back when. i was directed to their mouthpiece. all i can say is THANK GOODNESS FOR E BAY!!!! he supposedly had a hand in the design & building of these. i'm guessing he picked the color. pryme doesn't support the jcd201, but.....
yeah, i pretty much got the same results. i tried it on an ic735, ic751a, ic765, ft101e, ft767, ts440, a host of uniden grants, cobra 2000, and even a couple connex 4800/rci6900-type exports. on the hf rigs, it 'worked', but nothing at all to distinguish itself from the stock mic. on the CB's & exports-YUP. sucked. well, it was clean & clear, but absolutely NOTHING! no punch, it wasn't loud, and yes, the compressor made a difference in PEP watts, but, 75 to 90 ain't doing NOTHING. 75 LOUD watts seemed to outdo 90 'quiet' watts everytime.
looks nice, but it's missing something.