AAC-enabled headphones
prices on 668 modelsAAC support
— AAC is a codec used primarily in Apple portable technology to improve Bluetooth audio. In this sense, it is similar to aptX (see the relevant paragraphs), but noticeably inferior to it in terms of capabilities: if aptX sounds like an Audio CD, then AAC is at the level of a medium-quality MP3 file. However, this is quite enough for listening to the same MP3s, the difference becomes noticeable only on more advanced formats. At the same time, due to the undemanding to the hardware, AAC support in headphones is inexpensive, and there are quite a lot of models with its support.