I put the dyne mat in my fairing during my last audio mod (3rd time). I didn't compare the new set up with and without the dyna mat, so its impossible to say how much difference it made sound wise. It did "tighten" the fairing up though. Meaning, less rattling and vibration.
2009 Road Glide. 16 in Vindikta Wild Cats. Aquatic AV, Stinger 700X4 to MMatts, Audiopipe horns.
Ground Zero 7X10 in the lids w/ sspn.4 1000d, tuned with DD Audio DSI-2. S&S 106, lifters, push rods and AC. Drago 2. CycleRama 575. Progressive monotones -1in. 12in. HD adjustable rear shocks. Painted inner fairing. Tuned with TTS. Blacked out!