Wow...!!!...I rode it into a cheap, broken or almost broken bluetooth headphones in 5 months, and I left it mounted for a couple of weeks, without trying the sound (my son seemed to stop showing interest in these headphones...). Tonight, I have tried them and, what a good sound they have... I have been surprised at how clean sound, with deep and sound basses, more sharp than bass, but, I admit that it may be due to the low quality of the original plastic of the headphones... I recommend these engines, for the clarity and softness of the sound and the seller for sending them so fast (despite the pandemic) and with such good quality of packaging. Recommended and at a very good price.
good. treble is ok. middle is good. low is ok. it should be lounder.
fit on apAltec Lansing UHP 306 body.