Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Perfect reproduction of everything but ANY base <50hz

Seems innocent to not reproduce the TOTALITY of the deep base of everything you want to listen to through the headphones, but guess what?It's a FATAL flaw. These headphones are like listening to music on a handheld AM radio. Yeah, those things before ipods, but after 8 track tapes.[...] bucks huh? It's hard to make me feel like an idiot.Etymotic, you've chastened me, I feel real dumb.Thank you.