Hi: Bill and Paul: It may not be a TenTec item of discussion, however any one operating a linear amplifier should be aware of what happens to your signal with enhanced SSB. When I operate my amp at 1500 watts, I do not use speech processing and my signal can still be 40db over s9. I think a good item for amplifier users. Ed 73 K7DXV ewell2 at cvc.net