So I took advantage of the Father's Day sale and grabbed a pair of HE1000 Stealth and they arrived last Wednesday. Been breaking them in ever since. First impressions are that they are worth every penny at their original asking price of $2K and an absolute bargain at $1300!
The most noticeable trait I picked up on was their ability to not only etch out every drop of detail but their resolve of the micro dynamics. Every subtlety is both heard and felt! Nothing seems to escape these headphones, for good and bad. Thus far I haven't heard many poor recordings that sound overly bad. The HE1KS does highlight the poop, but it doesn't throw it in your face.
Tonality wise, I agree they are neutral-bright, but only just so. That's is HiFiMAN's house sound, so it's not surprising. Overall the HE1KS are smooth, extremely detailed and transparent with excellent holographic imaging. Timbre is spot on, coming across as natural and organic. Vocals have excellent body and controlled sibilance. Bass is tight, fast, textured, controlled, and of course powerful with excellent weight and impact! To my ears the response from the bass right through to the mids around 1K is as flat as the prairies of Saskatchewan. The rise to the upper-mids is shallow at first then shoots up, kind of like a fighter jet taking off from an aircraft carrier. From their the sound just ever so slightly overshoots the neutral (revised Harman) curve as it tapers off into the upper treble.
As for my source, so far exclusively out of my TOPPING D30/A30 Pro stack. For balanced it's straight DAC to amp. The A30 Pro's power and grip combined with the D30 Pro's quad CS DACs produce an uncoloured, detailed, punchy and spacious sound. For single ended there is a tube preamp in the middle, and I must say the HE1KS sound phenomenal with tubes! So far my favourite pairing is with the EF95 Mullard. These tubes bring out the mids and slightly de-emphasize the treble. OP amp rolling is next, but with my current Oracle-02 on the tone control and the V4 on the volume, the HE1KS sounds absolutely sublime with a MASSIVE soundstage!
Much fun to be had still!
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