QT5 definitely has the largest stage- treble is similar to the Shockwave III. I'd say it's the largest thus far (probably due to the spacious enclosure and an extra wide nozzle). Bass on both are excellent- very detailed, textured and can reach really deep. Earphones can sound very good, however if you enjoy a larger sound then a headphone is the way to go. If you already have a planar and want to try more earphones I'd say the QT5 will definitely impress on first listen. Otherwise I'd try the 400s
I agree with the ZhiYin QT5 Hybrid. These are really special.
The QT5's are a 1 DD + 4 BA Hybrid 5 units earphone. Like many hybrids they try to have the best of both worlds, low end/mids of DD's; speed, detail and high end claity of BA'S. IMHO, these succeed.
Some observations so far:
1. With burn in they sound better and better. This is like the Shockwaves.
2. Cables have a night and day affect on them. Hck sent me a 8 core MMCX Silver Plated Cable. I thought that this cable made the earphones a tad bright.Changing over to a Fidue 83 silver coated cable, that works both balanced and unbalanced, the sound becomes more mid centered and not as bright.
3. Running it balanced out of my Onkyo DP-X1 balanced output, using the same Fidue cables, and the full potential of these earphones come out. Wonderful and exteneded bottom end with lots of slam when needed, rich mids, and perfect high end with nice detail. Big soundstage for iem's. These really shine when run in balanced out of a high end player.
4. Very tip dependent, with a big nozzle that few tips fit. I tried various tips from my collection until I gave up and used a pair of the included tips. The wide bore tips that fit the earphone work best, but fit took some getting used to. I did use one set of tips that gave me a perfect seal, but altered the sound to much by adding more bass. Plus they were uncomfortable.
5. Did I say big nozzle and hard to fit in your ears? Well that was solved by resting the earphones on the bottom of one's ears and pushing in at that angle, good fit, not perfect but fine for me and nice sound.
These are probably the best earphones I have ever bought off of AliExpress, and the best at the price I paid.