I had bought the HE-500 (used like new), then traded it away toward some vintage Grados, then missed it, then bought another pair (used like new), then sold it as part of paring down my collection from 45 to about 33 pairs.
I miss it. In particular, I miss the fact that it was the only full-sized headphone that provided both subbass so strong that you could feel it AND clear, airy treble (as well as everything great in between)
So I went to my local audio store, which stocks the HiFiMAN line, and listened with my short music segments that look for palpable bass, transparent highs, and good soundstage.
I listened to the HE-500, the HE-560, and the HE-400i. Here is what I concluded:
- HE-500: Strongest of the three in subbass, just as I was looking for; however, side-by-side with the HE-560, it did not have nearly as large a sound stage, and the treble was less airy
- HE-560: Slightly weaker in the subbass than the HE-500, but overall better listening experience due to better soundstage and somewhat airy-er trebles. Also costs nearly twice as much ($899 vs. $499).
- HE-400i: Shares the larger soundstage and slightly airy-er trebles with the HE-560 over that of the HE-500, but MUCH weaker in the subbass, so much so that it sounded similar to the Grados that I have (known for modest bass but sparkling treble clarity).
For the moment, this has kept me from getting my THIRD pair of HE-500s. I particularly am going to listen more to my Sennheiser HD 800 with HDVD 800 DAC/amp, which has stronger subbass than my Grados, but not as much, I don't think, as the HE-500s.
The HE-560s were quite similar to my memory of my HD 800s (didn't have them with me in the store, of course!). Both the HE-560s and the HE-400is were more comfortable than the HE-500 (lighter, softer earpads, better headband), and both had "normal" cables, covered with black knit cloth, rather than the twisted pair of silver wires of the HE-500.
A quick listen to my HD 800 as I reread this confirms that its subbass does have some degree of palpable strength, perhaps in line with the HE-560, though not as much as the HE-500. However, it also has the superlative soundstage and upper clarity for which it is known.