so ive been on SSB for about two years now and honestly my audio has always been kind of mediocre. people can copy me fine but ive gotten a few comments about it sounding a little thin or distant, one guy said i sounded like i was in a tunnel which... not great. im running an IC-7300 into a Heil PR-40 which should be a pretty solid combo by most accounts but something isnt clicking.

ive read a bunch about compression settings, the bass and treble rolloff stuff, keeping TX bandwidth somewhere around 2.4-2.8khz for good intelligibility without splattering everywhere. i think my levels are ok, im peaking around -10 to -15 on the ALC which i thought was the right ballpark but maybe im wrong. mic gain is at like 55% on the radio.

anyone have thoughts on what actually moves the needle for SSB audio quality vs what people just argue about endlessly? like is the compressor on the 7300 actually useful or does it just make things worse if you dont set it up right. genuinely curious what experienced ops have found vs what just sounds good on paper

the ALC thing is worth looking at more closely — on the 7300 a lot of guys run with too much mic gain and the ALC is constantly working hard to pull it back, and that can definitely cause that squashed or distant sound you're describing. what you want is the ALC barely moving, like just kissing the bottom of the scale on peaks, not riding it. try dropping mic gain to maybe 35-40 and see if that cleans things up first before touching anything else.

compression on the 7300 is actually decent when set conservatively, like 4-5 dB of compression is useful for punching through a pileup or whatever, but if you crank it to 10 expecting more audio it just starts sounding processed and weird. the guys on the other end can tell. also make sure your SSB bandwidth is set to something reasonable, ive seen people leave it at the default and the defaults arent always ideal out of the box. the PR-40 is a good mic so its probably not that, its almost always the gain structure when people describe the tunnel effect.

yeah i had the same issue for months and it turned out my transmit filter shape on the 7300 was set way narrower than i realized, i think someone had been messing with the passband settings and cut the low end way back. once i reset it to defaults and then nudged the low cut to about 100hz and high cut to 2800 it sounded way more natural. also — and this is a little thing but it helped me — mic placement really does matter with the PR-40, its a side-address mic and i was basically talking into the wrong part of it for way too long and felt dumb when i figured that out lol