2021 (2022) Update:
I returned the Faro Stealth 2 ANR and got a Bose A20 instead. Couldn't have been a better decision. Yes it's $500 more, but everything about it is SIGNIFICANTLY better. If someone out there is deciding between a cheap ANR headset and a Bose or equivalent quality (e.g. Lightspeed), bite the bullet and get the Bose or just get a good passive David Clark headset. In hindsight, the Faro was garbage. No comparison between the two in any category other than price.
Sound quality:
- With the Faro, I had huge troubles hearing ATC and even my instructor next to me. Poor signal to noise. I remember this was a point of frustration for me (safety issue too -- DC SFRA flying). I hated the radio because I knew I wasn't going to hear clearly and correctly. I thought it was perhaps just the older intercom/audio system of the plane. Turns out it was the Faro headset all along. With the Bose, I enjoy working the radio. Huge radio confidence booster. Sounds lame, but it's true. A good quality passive like a David Clark would do about the same probably, but just STAY AWAY FROM CHEAP HEADSETS.
- BT music actually sounds REALLY good with the Bose, shockingly for an aviation headset but even besides that (no, does not compare with a studio music headset). There is actual clean bass, and the mids and highs are clean, whereas the Faro sounded like a tin can. I don't know how Bose did it, being an aviation headset as the priority, but intercom/ATC transmissions sound great and so does BT music!
- The old timer attitude about "ANR headsets are dangerous because you can't hear the engine, wind flow, etc. as well" is completely false. Yes, it will sound different than a passive, but you will soon get used to how everything sounds and queue to it just fine. If anything it's probably much safer -- much less fatiguing with ANR.
Mic quality:
- The Faro would pick up ambient noise easily and was troublesome at times even with the squelch adjusted. Made listening difficult.
ANR performance:
- No comparison. The Faro *did* reduce noise significantly as advertised, but then everything sounded like trash.
Comfort/clamp pressure/adjustments:
- No comparison. Not nearly as comfortable as the Bose. The Faro is huge and bulky. Cheap friction adjustment knobs. The Faro's higher clamping pressure and stiffer earcups could be an issue for some.
Build quality:
- No comparison. Parts of the Bose do feel cheap-ish for being $1,100, but hey. The control module feels solid.
Batteries / Battery Life:
- Manual says not to use rechargeable batts. A knock on Bose for this. However, there's no danger to the headset by using ONLY NiMH rechargeables (1.2V and different discharge curve than alkaline cells).
* CAUTION: DO NOT MIX BATTERY CHEMISTRY TYPES!!!!!!!!!!!!! This might be Bose's scapegoat reasoning for saying not to use NiMH rechargeables. In Bose's defense here, they're right -- NEVER mix battery chemistry types, as you could then possibly damage the headset / module under certain state-of-charge circumstances. But if you stick with IDENTICAL TYPE and EQUALLY CHARGED NiMH rechargeables, you're 100% OK. Just make sure your rechargeable NiMH batteries are brand/model-identical and equally charged. DO NOT MIX BATTERY CHEMISTRY TYPES UNDER ANY CIRCUMSTANCES. (Disclosure: I'm an electrical engineer and work a lot with battery-powered digital embedded systems, and have used my A20 extensively with quality NiMH batteries with zero issues.)
- It's likely just that they only designed and tested for alkaline, so they can't say it's ok for NiMH rechargeables for liability reasons. I've only been using rechargeable batts (modern NiMH batts, e.g. Panasonic Eneloop) and everything works great. Essentially, the low and critical batt phases will likely happen faster with NiMH, as these stay at ~1.2V for most of their batt life right up until the remaining ~10% or so. The module is tuned for alkaline, so the low/critical phases will probably happen more gradual with alkaline. Point being -- just carry spares and a separate pair of alkalines for backup (DO NOT MIX), but batt life has never been an issue for me. I haven't tested NiMH batt life (I'm sure someone has), but I'm sure you can get 20-30 hours easily, if not 40 hours.
* CAUTION: DO NOT MIX BATTERY CHEMISTRY TYPES!!!!!!!!!!!!!
- Take care when packing the headset away and don't squish the cable strain-relief grommets on the headset or on the module. I store mine in the softcase upside down in my flight bag, so as not to put pressure on the strain relief grommet (push in the earcups all the way too, to make it as short as possible).