My C3 system includes a Ray Samuals 'The Predator' portable amp, so the noted "problem" is inherent in the C3, not the quality of the amp used. You will never get a response from Klipsch that any of their products requires 'equalization' - they are always perfect, and the "problem" lies elsewhere. Donald1800

I agree with "the Thump's" recommendation. I personally own the Ray Samual's "The Predator" amp and an Asus Dolby 'headphone' encoder/audio processor with my C3s, and I have never used a quieter, cleaner amp for headphones. Donald1800

While playing with my headphone amp. equalizer compared to my Spectrum Analyser adjusted speaker system, I discovered that the problem you mentioned is caused by a C3 audio output with a slight bell curve emphasizing the mid range. Try cutting the mid range gently 3-6db from 500hz to 5khz centered around 1khz, and I think you will like the balance much better. Donald1800

I don't think that the impedance is causing any effects. 32 ohms is considered a medium impedance, I believe. The effects you describe most likely are caused by the inherent device sensitivity and accoustic frequency curve. Donald1800

I believe that the C3 impedance is 32 ohms. Donald1800

I too wear glasses while using the Custom 3s and haven't discovered any problems or discomfort. What specifically is the problem? Donald1800

Now that I've lived with the new Custom 3 eadphones for several days, ripped many CDs and post processed with 'Dolby ProLogic II' and 'Dolby Headphone', and learned how to use the Xonar U1 external USB Audio 'Card', I can now honestly say that after using the Xonar U1 Equalizer to remove the "Muddyness" and resonances, these headphones ae putting out sound of a quality I have not heard before from ANY headphone, and MOST speaker systems. Trully outstanding audio

I got them yesterday. Spent the appropriate period of time to get the seal and confort right, then proceded to test them out. The mid range was clear and smooth - nice. The bass was a little subdued and 'muddy' compared to my Klipsch ProMedia 5.1 with stacked subs. They lacked the tightness and impact in the low frequencies. I had to boost the 30hz and 16khz bands +6db and the 60hz and 8khz bands +3db to approximate my current system. I do recommend these headphones while listening to 'Dolby

I got them today. Spent the appropriate period of time to get the seal and confort right, then proceded to test them out. The mid range was clear and smooth - nice. The bass was a little subdued and 'muddy' compared to my Klipsch ProMedia 5.1 with stacked subs. They lacked the tightness and impact in the low frequenceis. Before people jump all over me about a "poor fit", let me say that I started out with the smallest gels which were too small - no seal, no bass. The mediums sealed

Oh Oh! Where is my FedEx tracking number? Hasn't my order shipped yet?