Indeed, (and I am only mentioning this because Plantronics is also on the chart) I bought a pair of Plantronics GameCom 367 and they were absolutely abysmal. They were hooked to a Yamaha RX-V373 audio receiver which in turn was optically connected to a PC so it couldn't have been a question about the configuration. Anyway, the sound was completely flat, almost no bass - certainly no punch whatsoever, the highs were absurdly cut and the middles painfully mediocre to say the least. The entire range was so bad that I was really frustrated I couldn't return them due to a hideous store policy at that time in RO. Not to mention that when you would pass the 75% volume mark the sound was completely distorted. What a complete disgrace. :(

The big takeaway: always test the product before you buy it never fall for the hype.