Review: Technics EAH-AZ70 (True Wireless)

The Panasonic RZ-S500W and Technics EAH-AZ70 share significant similarities, which is understandable given that both originate from Panasonic (Technics serves as their high-end audio brand). However, discernible internal and external differences exist between these headphones, which will be examined in this review.

Aesthetically, the Technics EAH-AZ70 exhibits a deliberate design, sophisticated styling, and a premium feel. The charging case is constructed from aluminum (as opposed to plastic), and the earbuds feature brushed metal accents, reminiscent of Panasonic’s high-end remote controls. They possess a subtle yet stylish elegance, akin to a luxury designer watch. These True Wireless headphones are clearly targeted towards the style-conscious consumer who prioritizes design over affordability.

The design and fit (which, for the reviewer, was adequate) closely resemble those of the RZ-S500W. Key distinctions include the Technics EAH-AZ70’s 10 mm speaker diaphragms, contributing to enhanced bass response (2mm larger than the RZ-S500W’s 8mm drivers), six microphones (compared to four), and a battery life of six hours (with an additional 18 hours provided by the fully charged case).

Sound Quality

Regarding audio performance, the Technics EAH-AZ70 delivers impressive sound quality, commensurate with its price point. It achieves a balance of clarity, responsiveness, and bass, without emphasizing any single element excessively. Beyond the larger speaker diaphragms, the EAH-AZ70 incorporates a specific earcup design that creates a “bass chamber,” allowing bass frequencies to develop and resonate back towards the listener. This design enhances the overall bass experience.

Complex electronica tracks, such as Nordlight‘s Feel Yourself, are reproduced with sharpness and precision, while maintaining a warm and solid foundation. Tula‘s ethereal rendition of Chris Isaak’s Wicked Game highlights the headphones’ dynamic range, with impactful “drops” and Tula’s clear, melancholic vocals positioned centrally within the soundstage. Even challenging tracks like Beastie Boys‘ Brass Monkey, which can often become muddled on lesser systems, are rendered accurately, preserving the individual elements and intricate details.

The Technics EAH-AZ70 exudes quality in all aspects, from its design to its construction. The accompanying app provides a seamless user experience and allows for configuration of various settings, including firmware updates. (Note: It is somewhat unusual that separate, visually identical apps are required for the Panasonic and Technics brands.) Like the RZ-S500W, the headphones feature an IPX4 rating (“sweatproof”) and support voice control.

The active noise cancellation (ANC) performs adequately. While it may not be class-leading compared to over-ear headphones, it effectively reduced ambient noise in environments such as a crowded subway car. The six integrated microphones deliver clear call quality. Although not comparable to a dedicated headset with a boom microphone, the EAH-AZ70 provides the best performance in its true wireless category tested to date; the design of true wireless earbuds inherently places the microphones further from the mouth.

Similar to the RZ-S500W, the EAH-AZ70 includes a comprehensive range of ear tip sizes, from extra-small to extra-large, which is commendable and should be emulated by other manufacturers. As is generally recommended, using the largest size that comfortably fits will optimize bass response.

Several factors prevent a perfect score, including the price and potential fit issues. A faint, constant digital noise (potentially related to the ANC) is perceptible during quiet passages. While not noticeable during music playback, it may be apparent between tracks. Furthermore, the absence of more advanced lossless codecs, such as aptX or LDAC, which Panasonic has previously supported, is a notable omission for a high-end headphone. While AAC (for enhanced sound) and SBC (for a more stable connection) are available, the inclusion of a high-resolution codec would have further elevated the audio experience. Finally, the battery life of six hours, while sufficient for most commutes, is relatively short.

Summary – Technics EAH-AZ70

Despite minor shortcomings and a premium price, the Technics EAH-AZ70 stands out as one of the most stylish true wireless headphones currently available, offering excellent sound quality across a variety of genres. For users with compatible ear shapes, they provide comfortable wear for extended listening sessions. These headphones are ideal for individuals who prioritize design alongside robust performance and durability. While they may not offer twice the value compared to more affordable options, including Panasonic’s RZ-S500W, achieving top-tier performance comes at a premium.