I have all three, 30-3G, .2, and PFX.
I got the PFX thinking I'd like them, but IMO, they are not worth the extra bucks for most average pilots. I keep going back to my .2's and find them more than adequate for my type of flying.
The PFX digital features are interesting since the oversized control box is really a digital signal computer with lots of available tweaks. And the potential to upgrade the firmware should Lightspeed invent a better mousetrap wheel. But the size and weight of the box is very unwieldy and the cord distance from box to bayonet plugs is too short (won't reach my kickpanel pouch in the Skylane).
The PFX does have an iOS app that permits features like fine tuning what you're hearing and recording what is heard and broadcasted. But with us already overloaded with apps to use in flight, it's something that gets backburnered and not used very quickly.
The PFX cables are reinforced with Kevlar. Jay H. likes that since he has cut his older headset cable a few times with the sliding canopy of his RV-8a. But for me, it doesn't add to the value.
Is it quieter than the .2's? Possibly on the measuring device, but for my ears, I can't tell any difference.
Is overall sound quality better than the .2's? Again, possibly on the measuring device, but for my ears, I can't tell any difference.
Would I buy another PFX? As long as the Zulu.2's are available, no, I wouldn't.
And I do have plans of selling my PFX for $975.00 + shipping/insurance/paypal cost. They have less than 10 hours on them.
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And my 30-3G's are still going strong. They need the ear pads replaced someday soon, but they work great as my passenger set.
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So, Loren, I'd say avoid the hype of the PFX and go with the .2's. You'll spend a bit less money and have as good of a result.
But if you do want some, contact Tina at Tina's Pilot Shop in Roanoke, TX. She is the local dealer and known to provide a really good deal when the manufacturer's let her.