Quote:
Originally Posted by
JiroG 
Really? Are the Radius atomic bass's deeper bass than the extreme port on the SP51's?
Well, either one is a good headphone, and I am a huge fan of the ME Electronics products. On low bass response only, the SP 51's on the extreme port are likely better, albeit that is fine line judgement.
Personally, I think the extreme position on the SP 51's overpowers mid bass and the mid-range somewhat while the base tuning on the Atomic Bass holds up very well and results in an overall better balanced sound, with good bass. To use a likely very poor analogy, it is like comparing Beats Solo to the Soul SL300. To my ears, the Beats go lower, but are muddier throughout the frequency spectrum. The Soul, while there are better sounding headphones at the same price, outshines the Beats in their price and (fashion) preference positioning.
Another thing to consider is fit. It is our experience that regardless of what tips are used, the AT Bass are more comfortable for a wider range of ears than the SP 51's- and to be fair, the ME Electronics M31 is probably one of the most comfortable, best "fitting" in ears I have encountered from any source for under $80 bucks or so.
Of course, the best comparison is listening to both. Absent that, I do think you will be happy with either if bass is your goal.