Closer Examination

The case is instrumental to true wireless earphones, providing storage and charging capability. It may also be the first thing you take out of the packaging. As I was, you may be surprised by the build quality and heft of the cradle, as Technics calls it, that comes with the Technics AZ70. "Cradle" is a good name for it since it is one of the largest cases i have seen, although not as bulky as the one with the HIFIMAN TWS800. This is far cleaner, too, with a color to match the earphones and minimal bling. The form factor adopts the tall pill box structure, with a metal fascia plate with the Technics logo on top given a brushed finish. The body is primarily plastic to keep things portable and not too expensive, with a central split going around the case and separating the lid from the body. The solid hinge on the back is inset to avoid an ugly offset. This is also where we see the Type-C port for charging.

Opening the box, we see a set of three white LEDs as battery status and case charging indicators. The LEDs are partly visible when the box is closed, allowing for a visual indicator of when the battery is fully charged even then. We then see the six pins per earphone on the case, which is certainly the most I have seen to date and allows for quick charging the earphones, a feature many market but really don't fulfill in practice. This makes for a 15 min charge for 70 min of rated battery life, which is very handy for an emergency. Typical charging is slower at 2 hours, but rated to provide ~6.5 hours with noise cancellation on, which translates closer to 10 hours in a best case scenario. This is pretty decent for TWS sets. Technics unfortunately does not provide any battery capacity information for more specifics, including for the case, where we only know that it takes ~2.5 hours to charge by itself and provides an additional two charge cycles to the earphones, which is woefully low, but these factors all combine to show that the earphones have above average capacity, while the capacity of the case is below average. I will also mention that the case and openings are adequately sized to fit all the included tips, but also some aftermarket foam tips should you prefer those.


The earphones are not very ergonomic, using a bulbous form factor for each ear. It is thankfully sculpted to where the nozzle enters the ear canal such that the shells effectively sit in the concha. The composition is mostly plastic with a metal face plate; matching the case in design further, this is the sort of attention to detail I appreciate. If you run your nails across the concentric circles, you can feel the finish, but it is otherwise smooth to where you can grip the sides and touch the face plate for all the available pre-programmed and customizable controls. The silver version should be similarly designed. Multi-colored indicator LEDs on the side indicate charging and pairing/paired modes, too.

We also see plenty of vents for the microphones, both for communication and active noise cancellation, as well as pressure equalization, which plays a big role with ANC devices. The underside also has the corresponding contacts for the case, all six of them, and we see a raised ridge with L/R markings for the respective channels, which helps align the earphones inside the case before the magnetic pins even enter the picture. Removing the pre-installed medium-sized ear tips shows a relatively narrow and short nozzle with a retaining lip at the end. A filter on there also prevents contaminants and ear wax from entering the acoustic chamber. Installing different ear tips is quite simple owing to the nozzle geometry, and definitely try out the different options for the best-possible fit.