The ddHiFi DJ44S is a 4.4mm ground pin adapter for Sony's NW-WM1 series players: it plugs into the 4.4mm balanced jack, takes your 4.4mm cable, and uses a short ground pin in the 3.5mm jack to tie the cable's shield to the player's chassis ground; the M1 fits the NW-WM1A and NW-WM1Z, the MAX fits the NW-WM1AM2 and NW-WM1ZM2, each in Black or Gold. It suits owners of these Sony players who use shielded, properly grounded 4.4mm cables.
Who the ddHiFi DJ44S is for
Sony NW-WM1A and NW-WM1Z owners: Choose the M1, which ddHiFi designed specifically for these two players.
Sony NW-WM1AM2 and NW-WM1ZM2 owners: Choose the MAX, which ddHiFi designed specifically for these two players.
Shielded 4.4mm cables: ddHiFi notes that the 4.4mm jack on these Sony players is not connected to ground; the DJ44S grounds a shielded cable's shield to the player's chassis, which ddHiFi says helps block outside electrostatic and electromagnetic interference.
Protecting the 3.5mm jack: The chassis ground is reached through the 3.5mm jack, and the ground pin is much shorter than a 3.5mm headphone plug, which ddHiFi says keeps grounding reliable without uneven force on that plastic-bodied jack.
Choosing a finish: Black uses a ddHiFi 4.4mm socket and a 24K gold-plated ground pin; Gold uses a Pentaconn socket, thicker 24K gold plating and Mundorf solder, and ddHiFi pairs Black with the NW-WM1A/NW-WM1AM2 and Gold with the NW-WM1Z/NW-WM1ZM2.
Skip it if: your 4.4mm cable is not shielded and properly grounded, which ddHiFi gives as a precondition for any benefit, or your player is not one of these four Sony models.
ddHiFi DJ44S key specs
Versions: M1 for Sony NW-WM1A/NW-WM1Z; MAX for Sony NW-WM1AM2/NW-WM1ZM2
Finishes: Black or Gold; 6063 aluminum alloy shell
4.4mm socket: ddHiFi (Black), Pentaconn (Gold)
Ground pin: 24K gold-plated copper; thicker gold plating on the Gold finish
Internal cable: 25.5 AWG 6N OCC
Solder: Sn 96.5% / Cu 0.5% / Ag 3.0% (Black); Mundorf Sn 88.6% / Cu 1.8% / Ag 9.5% / Au 0.1% (Gold)
Dimensions: 69.5 × 17 × 20 mm (M1), 78.5 × 17 × 20 mm (MAX)
Weight: 34 g (M1 Black), 35 g (M1 Gold), 37 g (MAX Black), 38 g (MAX Gold), excluding the plug
Genuine ddHiFi stock. Free shipping on every order, 45-day returns.
Yes. Every unit we sell is genuine and brand-new, shipped in its original packaging, and backed by our 1-year TonePier warranty and 45-day returns.
Where does my order ship from, and how long does it take?
Every order ships from our warehouse in China, with full tracking, and most orders ship within 3 business days. Shipping is free on every order; most US orders arrive within 7–15 business days and most orders to other countries within 7–20 business days — see our shipping policy for details.
What if it isn't for me?
You get 45 days to decide. Keep the packaging, keep it in like-new condition, and send it back for a refund. Ear tips unsealed for hygiene reasons are fine — we expect you to actually listen.
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