Audio Technica ATH-M30x vs Koss PRO-4AA – Full Comparison & Verdict (2026)

Convenient single-side cable exit. Advanced build quality and engineering. Collapsible for space-saving portability. Tuned for enhanced detail, with excellent mid-range definition. 40 mm drivers with rare earth magnets and copper-clad aluminum wire voice coils. Circumaural design contours around the ears for excellent sound isolation in loud environments. 3 YEAR WARRANTY : With over 50 years of Japanese Innovation and Quality behind it, this comes with a 3-year warranty from Audio-Technica that covers manufacturing defects.

- Noise isolating professional studio headphones - The first dynamic headphones to deliver true full frequency, high fidelity performance - Standard-setting design incorporates performance-enhancing technology - Superior isolation, accurate sound reproduction and the excitement of a live performance with every recording - Durable steel and generously padded rubber headband - Adjustable slide bars ensure snug fit - 8 foot coiled cord with 6.3 mm (1/4") plug - Covered under the Koss Stereo phones Limited Lifetime Warranty

Key Differences

Koss PRO-4AA and Audio Technica ATH-M30x are well-known options in the wireless headphone segment, offering a balance of audio quality, battery performance, and smart features. The driver size differs between the two (NA vs 40 mm), which can influence sound depth, bass response, and overall audio clarity. Both headphones offer solid battery performance, making them suitable for long listening sessions and travel. In general, both options are suitable for everyday use including music, calls, travel, and work-from-home scenarios. Koss PRO-4AA and Audio Technica ATH-M30x offer different noise cancellation capabilities (NA vs Sound Isolation), which can impact how effectively they block external noise. The frequency response differs (10 Hz - 25000 Hz vs 15Hz - 22KHz), which can influence how well the headphones reproduce lows, mids, and highs. Both models support modern Bluetooth connectivity, ensuring stable wireless performance with compatible devices. Impedance levels vary (250 Ohms vs 47 ohm), which can affect compatibility and audio output when used with different devices. There is a noticeable difference in weight (NA vs 220 GM), which may affect comfort during extended use.

Verdict: Both models are competitive, and your decision should be based on your usage needs and preferred features.

Top Differences

Noise Cancelling: NA vs Sound Isolation
Driver Size: NA vs 40 mm
Weight: NA vs 220 GM
Impedance: 250 Ohms vs 47 ohm

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Key Differences

Top Differences