Thank you for the correct reminder. Sorry we neglected to introduce how to use it. Please refer to the two pictures I added.

K9PRO is the flagship all-in-one desktop, so the specifications and performance will follow the highest standards. The price will be higher than 800 US dollars.

The target release date is March next year，please give us more time to change the audio DAC chip.

Yes, we will continue the K9 project with ES9038PRO*2，the functions and circuit will be changed also. We maybe start K9Pro first

Unfortunately, BB AUDIO DAC chip does not support high sampling rates，such as 384k

BTA30 has RCA output for analog audio signal， and coaxial+optical output for digital audio signal. K5pro has same one，so you can connect them through RCA or coaxial， or optical.

Yes, you are correct. Great！

Regarding this project, we will continue the product specifications. But the difficulties are more complicated than we thought. For example, we need to change the design to the ESS DAC because of the fire in the AKM factory

Thank you for your attention and feedback for BTA30. In order to make BTA30 more functional and cover more usage scenarios, we have tried our best to adjust hardware and software architecture . For this reason, it also led to serious delays in the project. Until it goes on the market, we are...

This combination has no problem, because 5V is a universal power supply

That's a good suggestion， we will check the AKM datasheet and confirm it, such as noise and THD audio specifications. :beerchug:

FiiO K3, the desktop USB DAC&Headphone amplifier can support optical output： https://fiio.com/k3

Sure, if you have a car power adapter, because BTA30 is powered by 5V input. Please note，BTA30 has no battery inside.

We originally planned to launch K7 by the end of 2020. The engineer team are working hard to advance the K7 sales date to October，K7Pro will be December. The current price cannot be determined because some technical specifications and materials have not been determined. Our goal is not low...

I think we can remain both USB B and USB C interface， the USB B is located on the back panel and USB C is on the right side. You can connect your smartphone with K7 through USB C more easily