Quoted from head-fi
Nozzle Size: 5mm | Preferred tips: Stock wide-nozzle single-flanges, Stock & Comply T-400 foam tips
Wear Style: Straight down or over-the-ear
Pros: Voluminous bass with excellent midrange clarity; lots of eartips included with many possible fit configurations; very well-made
Cons: Treble can get peaky typical of a TWFK earphone; a bit heavy in the ear
Accessories (5/5) – Single-flange wide-channel (3 sizes), single-flange narrow-channel (3 sizes), and bi-flange silicone tips, 4 pairs of foam tips, eartip spacer set (6 pairs in 3 sizes), shirt clip, ¼” adapter, airline adapter, cleaning cloth, pair of cable guides, soft carrying pouch, crushproof metal carrying case, and integrated cable wrap
Build Quality (5/5) – As with all of the other Dunu products I’ve tried, the construction of the DN-1000 is very solid. The metal housings have a nice finish to them and the latest iteration of Dunu’s cable is soft, smooth, and tangle-resistant. The machined aluminum y-split and cable cinch add to the premium feel. It may be a little more impressive to see this same level of build quality on Dunu’s sub-$100 models but that doesn’t detract from the DN-1000 in the least. There doesn’t seem to be any driver flex on my unit, either. My one complaint is that the silver L/R markings can be tough to see and the small bump on the left strain relief meant to help identify the left earpiece is too close to the earphone housing
Isolation (3.5/5) – Very good for an earphone with this form factor
Microphonics (4/5) – Good when worn cable-down; excellent when worn over-the-ear
Comfort (3.5/5) – The housings are on the heavy side and large enough to hold the hybrid driver setup. The weight and size can lead to mild discomfort in the long term but the earphones lend themselves nicely to over-the-ear wear, which helps with the weight. Overall, the DN-1000 is similar to the AKG K3003 in size and fit, though its strain reliefs are not offset like those of the AKGs. Dunu’s new eartip spacers help position IEM housing farther out of the ear and can also have an effect on sound, similarly to what we normally accomplish with tip rolling. That said, the DN-1000 is a little pickier with fit than sets like the RHA MA750 and some of the possible tip/spacer combinations make it easy for the tips to slip off the nozzles
Sound (9.2/10) – Balanced armature / dynamic hybrid earphones have been gaining popularity in the past year or two, but few have impressed me as much as the DN-1000. Dunu’s new flagship does what every hybrid hopes to – combines the bass performance of a good dynamic driver with the strengths of a BA setup, in this case the popular Knowles TWFK. The bass driver of the DN-1000 performs very well, providing plenty of both mid-bass and sub-bass, and should satisfy all but the most die-hard bassheads. The bass extends deep and is pretty quick considering the quantity. The RHA MA750, for example, is slower and can sound a bit “bassier” in the conventional sense as a result.
The DN-1000 has a thinner note presentation than the RHA MA750, especially in the midrange, but also sounds clearer than the more veiled RHA set. The DN-1000 has more perceived clarity compared, for example, to the HiFiMan RE-400 and StageDiver SD-2, which both sound duller at the top end.
The top end of the DN-1000 is bright and crisp, and again rather typical of a TWFK-based earphone. It can be a touch splashy, especially at high volumes, and it takes some playing with all of the included tips and eartip spacers to get the optimal (i.e. smoothest) treble performance out of the DN-1000. I personally found foam tips (especially Comply T-400s) with a deeper seal to work best for me, and the wider single-flange silicone tips with the red spacers to be good as well. In truth, I tend to listen at lower volumes and generally quite like TWFKs, but those who expect to crank up the volume with the DN-1000 to maximize bass impact may find the treble a little too prominent. The RHA MA750, for example, has overall smoother treble and makes the DN-1000 seem a bit fatiguing in comparison. The same goes for the pricier EarSonics SM64 – its treble is smoother, especially at high volumes.