HarmonicDyne Helios Headphones

I didn't buy the Helios on Drop either. I got them used in like new condition for $70 and I think they're a good fun pair of headphones. As you noted, the bass in nice and punchy, the mids a recessed, but still clear, and the treble is smooth with plenty of energy and air for detail/micro detail. Had I purchased these new at their retail price I would have been quite happy. I much prefer them to competitors from Sennheiser's HD5xx series and I actually prefer them to the DT990s from Beyer as well. I think the AKG K7xx series is better, but they are also completely different headphones in just about every way. I like to buy budget headlhones for fun, potential modding, and to use in my shop or on the go where my ZMFs and DCAs and such aren't appropriate. The Helios are certainly a fun little set to have around and I'm enjoying them a lot. Right now I have them plugged into the little stack I have out in my shop and the Helios sound great. I think they'll end up getting quite a bit of head time out here.

ZPolt Reviews the Helios, for a pair of headphones under $200 the build quality looks impressive. https://youtu.be/NI3HyBjVMbg

An update: I ended up finding a great new set of pads in the pack that Linsole sent me -- I think the thicker the better with these to help the soundstage and reduce the treble even further. Avoid perforated pads though, those only made the treble worse. I'm also now running these balanced from my Zen DAC and WOW ... that helped bring clarity to the bass and mids even more than before. Could not be happier, I'm in audio heaven!