Prefer passive to active because I want to block potentially damaging levels of noise, not just cancel outside noise. (please correct me if I have no idea what I'm talking about). These would be for bus use, and would have to block out screaming children, bus engines that sound like a jet taking off, and I'd also like to block lower frequencies.
Would also be interested for opinions on getting some in-ears and some ear muffs to go over them instead.
Been considering getting these, they're cheap and roughly fit the bill but I'm concerned the sound quality will be low.
For reference I currently have a pair of "Superlux HD-668B" which I'm pretty pleased with sound quality wise, but the headband's annoying and the stubby-short-cord has developed a dodgy connector. Plus they isolate basically nothing.