Custom Headphones Explained: Custom IEMs, Reshells and Cables

Custom headphones can mean custom-fit IEMs, a reshell of IEMs you already own, or a custom-built headphone cable. What each involves and which guide to read next.

by Dr. Xuan
October 16, 2026
7 min read

Hakone MKIII copper and silver braided headphone cable with 4.4 mm balanced plug

Custom Headphone Cables: Connector, Plug, Length and Conductor

What a custom headphone cable is, the headphone connectors, plugs, lengths and conductors you can choose, and how to order one from Null Audio.

by Kevin Wang
October 13, 2026
8 min read

Aoraki MKIII gold and silver headphone cable split

Headphone Cable Connectors Explained: Mini XLR, Focal, Beyerdynamic and More

The detachable connectors used on audiophile headphones from Audeze, ZMF, Focal, Beyerdynamic and Shure, and how to order the right cable.

by Dr. Xuan
December 09, 2025
7 min read

Moebius headphone cable with 4.4 mm balanced plug

Replacement and Balanced Cables for Sennheiser HD 600, HD 650, HD 660S2 and HD 800 S

Which connector each Sennheiser HD headphone uses, from the HD 600 family to the HD 800 S, and how to choose a replacement or balanced cable.

by Dr. Xuan
October 21, 2025
7 min read

Hakone MKIII silver and copper hybrid cable with 4.4 mm plug

Copper vs Silver vs Silver-Plated Copper: IEM Cable Materials Explained

What copper, silver, silver-plated copper and gold-silver conductors really change, what OCC, 7N and Litz mean, and which Null Audio cables use each.

by Dr. Xuan
September 24, 2024
8 min read

Null Audio player plugs: 3.5 mm, 4.4 mm balanced, 2.5 mm balanced and right-angle 3.5 mm

3.5 mm, 2.5 mm or 4.4 mm Balanced: Which Plug for Your Player?

What balanced output is, how 3.5 mm, 2.5 mm and 4.4 mm plugs differ, and how to choose the right plug for your DAP, dongle or amp.

by Kevin Wang
February 20, 2024
7 min read

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