{"product_id":"dd-ddhifi-dj44s-m1-ground-pin-adapter-for-sony-nw-wm1a-and-nw-wm1z","title":"DD ddHiFi DJ44S M1 Ground Pin Adapter for Sony NW-WM1A and NW-WM1Z","description":"\u003ch2\u003eAll-in-one design with exclusivity\u003c\/h2\u003e\n\u003cp\u003eDJ44S M1 is designed exclusively for SONY NW-WM1A and NW-WM1Z.\u003c\/p\u003e\n\u003ch2\u003eRetaining the signature tuning\u003c\/h2\u003e\n\u003cp\u003eThe DJ44S use the OCC copper cable for connectivity and lead-free gold for soldering*.\u003c\/p\u003e\n\u003cp\u003e*MUNDORF Sn 88.6%, Cu 1.8%, Ag: 9.5%, Au 0.1%.\u003c\/p\u003e\n\u003ch2\u003eWhy is SONY DAPs' 4.4mm jack not connected to the ground?\u003c\/h2\u003e\n\u003cp\u003eThe conventional balanced headphone cable has only four connection points, namely R+, R-, L+ and L-. However, it does not feature the use of the Ground point on the 4.4 mm plug. On the other hand, if the 4.4mm headphone jack was grounded, there might be impacting feedback when plugging and unplugging. Perhaps, for this reason, the SONY DAPs' 4.4mm jack is not connected to the ground.\u003c\/p\u003e\n\u003ch2\u003eWhy does the sound quality improve after being grounded?\u003c\/h2\u003e\n\u003cp\u003eThere is a precondition that the 4.4 mm headphone cable used must be shielded and properly grounded. The chassis of Sony players, particularly the NW-WM1Z and NW-WM1ZM2, is made of oxygen-free copper gold-plated material with high purity and strong electrical conductivity that can provide a good grounding for the cables with shielding. When a 4.4 mm headphone with shielding is plugged into, the shielding layer of the cable is then grounded to the player's chassis. As a result, it can better prevent the influence of external electrostatic or electromagnetic induction.\u003c\/p\u003e\n\u003ch2\u003eIntegrated grounding design promotes reliability and safety\u003c\/h2\u003e\n\u003cp\u003eThe chassis of the SONY players are connected to the ground of the 3.5mm jack. The ground pin of the DJ44S is much shorter than the 3.5mm headphone plug, which ensures normal grounding and prevents damage to the jack due to unbalanced force*.\u003c\/p\u003e\n\u003cp\u003e*Unbalanced force means the pressure point can be overly biased toward one side when inserting or pulling the adapter at an inclined angle. Since the 3.5 mm headphone jack uses a plastic chassis, this is very likely to damage the jack.\u003c\/p\u003e\n\u003ch2\u003eSpecification\u003c\/h2\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDJ44S M1\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eBlack\u003c\/td\u003e\n\u003ctd\u003eGold\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShell\u003c\/td\u003e\n\u003ctd\u003e6063 Aluminium Alloy (black)\u003c\/td\u003e\n\u003ctd\u003e6063 Aluminium Alloy (gold)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInternal Cable\u003c\/td\u003e\n\u003ctd\u003e25.5 AWG 6N OCC\u003c\/td\u003e\n\u003ctd\u003e25.5 AWG 6N OCC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGround Pin\u003c\/td\u003e\n\u003ctd\u003eCopper plated with 24K gold\u003c\/td\u003e\n\u003ctd\u003eCopper plated with 24K gold (thicker)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e4.4 Socket\u003c\/td\u003e\n\u003ctd\u003eddHifi\u003c\/td\u003e\n\u003ctd\u003ePentaconn\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSoldering Tin\u003c\/td\u003e\n\u003ctd\u003eSn 96.5%, Cu 0.5%, Ag 3.0%\u003c\/td\u003e\n\u003ctd\u003eSn 88.6%, Cu 1.8%, Ag 9.5%, Au 0.1%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight (excl. the plug)\u003c\/td\u003e\n\u003ctd\u003e34g\u003c\/td\u003e\n\u003ctd\u003e35g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e69.5 x 17 x 20 (mm)\u003c\/td\u003e\n\u003ctd\u003e69.5 x 17 x 20 (mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"DD ddHiFi","offers":[{"title":"Black","offer_id":43765786509545,"sku":"DJ44S M1 Black","price":99.99,"currency_code":"USD","in_stock":false},{"title":"Gold","offer_id":43765786542313,"sku":"DJ44S M1 Gold","price":139.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0065\/4432\/6771\/products\/DJ44S-M1-B01.jpg?v=1762462869","url":"https:\/\/audio46.mom\/products\/dd-ddhifi-dj44s-m1-ground-pin-adapter-for-sony-nw-wm1a-and-nw-wm1z","provider":"Audio46 Headphone Store","version":"1.0","type":"link"}