Jones Maxflow - Not great?

I'm no fan of turndowns under the car. Don't like the sound under other cars and hate it under mine. I'm liking the 3" full-length tailpipes under my 68 Barracuda with LA360. And the 3-chamber Dynomaxers that TTI supplied in 1999 are still sounding great.
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But the best mufflers I ever heard were on a 71 Demon340..... back in 71. The owner, a fellow high-schooler had just cut out the factory mufflers and installed straight-thru glasspacks. They were Orange and short and loud and obnoxious, perfect for a rebel 17 yearold. I forget the name of those. There were so many of those back in the day; Purple-Hornies, Cherry-Bombs, something Gooses, and these Orange ones, to name a few. Course today, I wouldn't even use 'em for resonators.They are totally cop-magnets.
The dynomax turbos are quiet when cruising, and inside the car are not particularly loud at WOT. But at 6000 to 7000rpm, at WOT, they scream like banshees on fire.
People even say they can hear the screaming demon sound, coming from a couple of miles away. Coming, not going;lol.
Mine were new in 99,and still not rusted out, so they've done well.