Upgrade Cable for Sennheiser HD600 HD650 HD525 HD545 HD565 HD580 Sleeved/1.5METER
The Sound of Excellence
The Sennheiser HD600 and HD650 are two of the most iconic headphones ever made — but both are routinely held back by Sennheiser's stock cable. The OEM cable uses thin, low-purity conductors in a rubber jacket that introduces microphonics, limits dynamics, and adds a slight veil to the HD6XX series' already delicate presentation. Replacing it is the single highest-value upgrade available for these headphones.
The Headgear Audio Leo OFC Cable is handcrafted in Mumbai using 24AWG, 4-core OFC (Oxygen-Free Copper) conductors with 20 strands per core — a geometry engineered to balance flexibility with signal integrity. OFC eliminates the oxygen-induced crystal boundaries found in standard copper that subtly colour and limit the headphone driver's performance. The result is a tonally neutral, dynamically alive cable that lets the HD600 and HD650 perform exactly as their drivers were designed to.
Sonically, the Leo is voiced for neutrality and natural musical presentation — it does not add warmth, brightness, or any colouration. What it removes is the stock cable's restriction on dynamics, channel separation, and low-frequency weight. Customers describe a more layered, wider, and smoother sound — particularly on the HD650, where the cable change transforms a "good headphone" into something that competes with gear costing many times more.
Terminated with original Neutrik gold-plated connectors soldered with Cardas silver solder. Sleeved in Mil-Spec 550lb nylon paracord made in the Netherlands — rot, mold, UV, and mildew resistant. The cable slider is CNC-machined anodized aluminium made in the USA, cryogenically treated for durability. A seamless Y-split transitions from 4-core to dual 2-core runs at the headphone side — no soldered joint at the split means no weak point.
Specifications
Technical details for the 3.5mm to RCA Coaxial Digital Adapter Cable
Compatible Headphones
All models using the Sennheiser dual 2-pin HD6XX series connector.
Amplifier connections available
Why Headgear Audio
Handcrafted audiophile cables, made with care in Pune, India
Frequently asked questions
Everything you need to know before buying

