![]() I decided to dissect the shell and see what was causing it. I found a quick coat of clear nail polish on the inner shell insulated it enough to prevent this and further listening was unmarred, but this is a definite QC issue as the shell should never be used as the ground for an in-ear. ![]() When I hit play it began again so I very unscientifically touched the inner shell to my tongue with music playing and sure enough, it felt as if I had stuck my tongue to a 9Volt battery. ![]() I later noticed during a period of wearing them with music stopped that the irritation quit. When I first started listening, I noticed it was causing my left ear to itch and I periodically had to remove the earpiece and scratch. I did experience one issue with the DT6 Pro. This may ultimately make the cable less durable than some others. If there is one complaint on the cable, the strain relief on the jack is minimal and none exists at the lower side of the splitter. The north end of the cable terminates in mmcx connectors in black plastic housings. ![]() The mic well positioned at about chin height and features a 3 button remote opposite the mic port. No chin slider is provided and the large mic/ remote would obstruct it anyway so that is just as well. The splitter is matching with knurling around the center portion. The jack is of the straight variety with a brushed aluminum housing with knurling on the upper portion. With the black sheathing, and brushed aluminum fixtures, the cable is well matched to the earpieces. Senfer lists the cable as silver plated copper in their documentation. The cable I received is the with Mic version and appears to have changed very little from the DT6 as when put side by side they are near an exact match. It does scale some with more potent sources but this seems more qualitative than quantitative as the piezo is capable of delivering micro-detail if provided with an adequate input. This would suggest the DT6Pro should be fairly easy to drive, and it is as it worked well from both phone and tablet. The Pro has a nominal impedance of 16Ω with a listed sensitivity of 1o5dB/mW. No detail on which BA is used in the pro is provided by Senfer so although it is possible that it uses dual 30042 drivers, it is perhaps more likely to be 30095s as they are much more frequently seen paired. The Pro steps that up to a 12.5mm dynamic, maintains the 7mm Piezo, and adds dual balanced armatures at the top end. The original DT6 was one of the early Piezo-hybrids on the market and combined a 12mm dynamic, a 7mm (squared) piezo, and a single 30042 balanced armature to round out the package. Gone are the Devo hat style tips from the original model (thankfully). The kit consists of earpieces, cable, shirt clip, 3 silicone tip sizes, and the warranty card. Inside the box, the tips rest in a foam surround with the remainder of the items in a small box above it that is emblazoned with Senfer in gold. The rear does have a label added with specs in English and Chinese. The front says only Hifi and focus on excellent sound with no indication of the product inside. The DT6 Pro came in an understated white lift top box which oddly makes no mention of Senfer anywhere on it other than a small logo and the words “designed by Senfer” in small print on the label on the rear of the box. I have no financial interest in Senfer, nor do I feel a need to disclose which vendor it was purchased through as the DT6Pro is widely available at roughly the same price point from Aliexpress. I purchased the DT6 Pro at retail cost because I had enjoyed the DT6 and wanted to see how the Pro compared.
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