so ive been on HF for about two years now and mostly do SSB on 40 and 20m, and im starting to get more conscious about how i sound on the other end. been getting reports anywhere from 'sounds great' to 'a bit muffled' on the same rig depending on conditions i guess but also i suspect some of it is just my setup.

running an IC-7300 into a Heil PR-40 through the Heil adapter cable, and i keep going back and forth on the TX EQ settings in the radio. right now i have a slight boost around 2-3kHz and roll off a bit below 200Hz because i read somewhere that cutting the low end cleans up the audio and reduces splatter but honestly i dont know if im doing more harm than good at this point.

also the compression — i see people saying run zero compression, and other people saying run 3-4 on the IC-7300's compressor for SSB DX. seems like total opposite advice. anyone have a feel for what actually moves the needle on SSB audio quality vs just placebo stuff people repeat on forums

the compression thing is a legitimate debate and the answer kind of depends on what youre trying to do. for ragchewing or nets where readability matters more than peak power, a little compression — like 2-3 on the 7300 — helps fill in the quieter syllables and keeps your average power up without distorting the peaks. but crank it too high and you get that pumping artifact and the audio starts sounding harsh and fatiguing to listen to. ive seen guys run 8-10 and wonder why nobody wants to stick around for a long QSO.

for DX work where youre trying to punch through a pileup and every fraction of a dB matters, more compression can help as long as you keep an eye on the ALC and dont let it slam. the PR-40 is a good mic for the 7300, the response curves play pretty nicely together. your EQ approach sounds reasonable — cutting below 200 is pretty standard, speech energy down there just muddies things and doesnt help intelligibility at all. id maybe try a slight boost around 1.5-2kHz instead of going all the way to 3, thats where a lot of the consonant clarity lives and it tends to cut through noise better.

honestly the single biggest thing i ever did for my SSB audio was just monitor myself on a second receiver. like actually listen back in real time on an SDR or a second radio while you transmit. you hear things you just cannot hear from the other side of the mic. i was convinced my audio was clean for like a year and then i finally listened back and there was this weird resonance every time i hit certain vowels, turned out i was just too close to the mic.

mic technique is so underrated, people obsess over TX EQ settings and compression ratios and half the time the issue is theyre eating the mic or theyre 2 feet away and the preamp is cranked to compensate. consistent mic distance, talk across it not directly into it if youre using a dynamic, and then the EQ stuff starts to actually matter.