What tech should I be looking for (and looking to avoid) when shopping for wireless headphones for watching TV? I am not an audiophile and don't really care if I can or cannot hear rich bass undertones or whatnot. I just want to hear what's going on on the screen (a) without distortion/interference/drop outs and (b) to hear it at the same time as the lips move/without lag.
In terms of price, it seems to go infrared < RF < 2.4GHz < Kleer/Sennheiser/AKG. Bluetooth is all over the show, and I'm not sure DECT headphones even exist (though I did find some expensive DECT speakers so I assume the technology works for audio).
But is price indicative of quality? I was surprised at just how many 2.4GHz audio transmitters/headphones seem to be available when I would have thought the 2.4GHz spectrum is totally oversaturated? Or do these work "compatibly" with WiFi? Why is it more expensive than RF/things around 900MHz?
My TV doesn't have bluetooth but there seem to be plenty of external bluetooth transmitters. I also already have a couple of bluetooth headsets so this could be a cheap option. But I worry about lag and interference. I can't always get a reliable connection between pocket and headset, so what would across a room be like - though it would be line of sight I guess? If I do go for bluetooth, I've seen references to APTX - should I be looking for this? I guess both transmitter and headset would need this tech?
I am looking for two people to be able to watch at once, and have seen that there are some bluetooth transmitters supporting multi-point or multi-link or some other trademarked term, but essentially allowing two headphones to pair at once.
If it matters, ideally I'd like to connect via a SPDIF/toslink/digital optical cable. The current TV doesn't have an old-style RCA/3.5mm audio out.
Price isn't necessarily determinative, but I'm going to need some really good reasons to justify a thousand bucks on two pairs of high end Sennheisers (or mid-range Bose). BTW: why are US Sennheisers so much cheaper than NZ ones?
I'm aiming for $400-$500 max for two pairs of headphones.
For those paying attention, yes I have asked similar questions before. It's been a very long process in getting to where I am now. It's also involved wasted money as I have tried many "cheap" options with unsatisfactory results. Should've just done it right the first time.