Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Too easily overdriven, not enough bass

The first time I used these headphones I overdrove them, trying to get a satisfying amount of bass out of them. I overdrove them with a yamaha 50 watt/channel reciever via the headphone jack - with minor clipping only, no major distortion. They now crackle louder than my popcorn maker (the microwave oven) even when driven with my computer soundcard. They are great if you love the "treble control" at or near max. I know I should have purchased a studio monitor set of 'phones now. The SPL of these 'phones is great if you are driving them with a mp3/portable CD they may be fine. My 1981 set of Koss headphones ($24.95 at the time)are far superior. I have yet to obtain warranty coverage - and would advise anyone thinking of buying these that enjoy ANY music with a decent amount of bass, including classical music with demanding passages, avoid these headphones. 0 stars in my book.