My comparative review for the Peltor Tactical 6S and Tactical Sport Electronic Hearing protectors. I am placing this same review under both products because I believe others might be interested in a direct comparison if considering either set.
I purchased a pair of the Tac 6S for use at my planned Frontsight 4 day Defensive Handgun course, and used them a few times at a local indoor range beforehand. I found them to be very effective in muting the report of my 9mm Glock, as well as my Ruger snubbie with both .38 spl and .357 Magnum rounds. I found the amplification to be clear and effective. My only complaint of the Tac 6S is the difficulty in replacing batteries. It is a complicated procedure involving pulling off the earpads and the inner foam pieces. I DID find an "alternate" method listed in the instructions, which was a bit easier for me. It involves a small screwdriver and a bit of prying. Still, I give it 4 stars because they do what they are called on to do, and the price is quite reasonable IMHO. OH...one other minor inconvenience. There are on/off/volume knobs on the back of each earcup and, when the set is folded, the headband wires rub against those knobs. On at least one occasion, I discovered that the earphones were turned back on by the folding action. From that point on, I simply fold them up and THEN turn them off.
When I scheduled my wife for a one day class at Frontsight during my 4 days there, I realized that we would need another pair, so I bought the Tac Sport headphones based on other positive reviews. After I used the Tac 6S for my first two days, I gave them to my wife and I put on the Tac Sport set. My first impression was that the Tac Sport was even more clear sounding, with possibly even a bit more amplification. Range commands were easy to hear (on both pairs) even without wearing my hearing aid, but the gunfire was all muted to a very comfortable level. Even when the instructor was speaking while there was gunfire on the next range over (rifles), the muting was released quickly enough to miss very little of the speaking. I am very happy with these earmuffs and would recommend them to anyone. I haven't used the Tac Sport on an indoor range yet, but I expect them to behave at least as well as the 6S, since the NRR number is the same for both. I found only one minor inconvenience with the Sport version versus the 6S - On the 6S there are separate controls for each ear, which could be handy if your hearing is less in one ear than the other (as mine is). On the Sport model, the controls are all on the right earpiece and control both sides. That is probably not a big deal for most people, but I thought I would mention it. Both sets fold up small, and the Sport model has a soft cloth pouch for storage. They also have an extra pair of outer shells, in orange (not on the 6S). The biggest advantage IMHO for the Sport is the ease of changing batteries. It is a simple matter of removing the outer shell (the batteries are only on one side in this model). They say that the batteries will last up to 500 hours, but I can't address battery life on either because I haven't used them that much.
All in all, I would recommend either set for outdoor ranges, and indoor ranges to the extent of my testing which, as I mentioned, included firing a .357 Magnum snubbie. I don't know how long they will last, but my initial impression is all positive, with the significant differences mentioned. Also, this was only tested on handgun ranges, so I don't know how effective it will be with rifles or shotguns, but I'm fairly certain that a number of students in the rifle and shotgun courses at Frontsight were using them. Oh, I have no need for an audio source input, so the proprietary connection doesn't bother me, but that might affect my decision if I had that need.