I own a pair of IE80 earphones with custom silicone sleeves which I am generally happy with. I have just purchased a Bravo Audio Ocean heaphone amp and wonder how the Sennheiser HD 650 headphones compare to the more portable IE80s.
I would be grateful for any comments about the difference in sound quality between the IE80 and HD 650. Is there a dramatic improvement in sound quality with regard to bass, mid range and treble? I previously owned a pair of Sennheiser HD25-1 IIs but sold them because of harsh treble / sibilance and then sold my V-Moda M-80 headphones to help pay for a pair of Momentum headphones. The Momentums were returned because of concerns about using them outside. Having read many reviews the HD 650s seem to offer the best sound quality (notwithstanding that they are indoor headphones).