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Marcus Kim

Senior Audio & Headphones Editor · 9 years reviewing · 242 articles

Marcus has spent nearly a decade testing headphones, earbuds, speakers, and audio gear for consumer publications. He runs a calibrated listening environment and measures every product independently rather than relying on manufacturer specs. At TheTestedHub, Marcus covers over-ear and on-ear headphones, true wireless earbuds, noise cancellation, Bluetooth speakers and soundbars, and Hi-Fi gear including DACs and amplifiers.

Senior Audio and Headphones Editor at TheTestedHubNearly a decade of experience reviewing consumer audio productsReal-world testing across all price tiers with calibrated measurement equipmentBackground in electrical engineering and signal processing

Areas of expertise

Over-ear and on-ear headphones

True wireless earbuds (TWS)

Active noise cancellation (ANC) measurement

Bluetooth speakers and soundbars

DACs, amplifiers, and Hi-Fi equipment

Frequency response and HRTF analysis

Latest by Marcus Kim

5 Conference Call Bluetooth Headsets Worth

Guide

We Tested Bose Under Cabinet Radios: Honest Picks

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5 Best Wireless Earbuds for Running 2026

Guide

JL Audio vs Rockford vs Alpine: Best Compact

Guide

Which Amplifier and Receiver Is Right

Guide

2 Channel Stereo Receivers That Deliver Real

Guide

5 Best Stereo Systems of 2026

Guide

5 Best Low Profile Electronic Earmuff of 2026

Guide

5 Best Under Counter Radio CD Players of 2026

Guide

5 Best Integra Receivers of 2026

Guide
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