D3soLaT3
100+ Head-Fier
I have not directly compared the HF580 to the Sundara but I think most people would agree the 580s are a step down from the Sundara. I've never considered the 580s fatiguing and (at times) wish they had more treble extension and were a little more airy. This is coming from a proud HF580 owner and I will be keeping them for the foreseeable future. If you are looking for planars under $200 the iSine10s are $150 right now and I prefer them over the HF580s although they both have their quirks and need EQ. If you have the capital by all means get the Sendys, but if you aren't looking to break the bank, the Thieaudio Phantom are $350 (like the Sundara) and are comparable to the Aivas according to HBB.Have anyone compare them with hifiman Sundara? I have the Sundara. But I find them too fatiguing. I think for me the problem is that they have too much detail, are intimate and something with the treble. I really don’t know what it is. The first 30min I use them I like them but then I have to take them off( I have dt880 and dt990, I am use them for 2+ hours). I was looking for the hf580 and the sendy aiva. But hey seem to have the intimate forward aggressive sound he Sundara have?
Either way, it's a great time to be a planar enthusiast. There are no bad choices. Only preferences.