Tone2 pro pro#
The Tone2 Pro board supports up to 32-bit/384kHz PCM digital audio and bit-perfect DSD512, with the ESS ES9038Q2M DAC providing an analog line-out signal with -118dB THD+N. The company also confirmed they intend to sell a balanced RCA to XLR-3 converter cable (see more info here: /balanced-rca)
Tone2 pro portable#
The Tone2 Pro actually uses custom designed slim-profile RCA jacks that are ideal for portable applications and these balanced RCAs retain backward-compatibility with standard RCA connectors (single-end mode). When powered by a compatible 5V linear power supply users can connect via Tone 2's secondary USB-C port (I2S) and the supply will take higher priority over USB power.Īnd interestingly, the Khadas designers added an industry-first balanced RCA line-out - a novel design that uses three signal-pins (for an inverse analog signal) instead of two, yet retains the same size and form factor as regular RCA connectors. The Tone2 Pro's aluminum enclosure incorporates a hybrid digital/analog volume control knob, allowing users to rely entirely on analog signal attenuation for improved sound reproduction.Īnd with not one, but two USB-C ports, the Khadas Tone2 Pro allows users to connect a 5V linear power supply to the second USB-C port whilst having USB-C data on the first for excellent power-noise isolation. Other additions to the Tone2 Pro include a 4.4mm balanced headphone jack in addition to the standard 3.5mm single-end jack. As Khadas explains, "the OPA1612 was selected because it provides superior audio quality and excellent distortion characteristics THD + noise is below 0.00008% throughout the audio range (20Hz to 20kHz)." This 3-stage amplification pathway enables Tone2 Pro to drive a wide-range of demanding audiophile-grade headphones with impedances of up to 150 ohms. For this project, Khadas paired an ESS ES9038Q2M DAC with four TI OPA1612 operational amplifiers, and three buffer amplifiers.
Tone2 pro software#
Using its own software and hardware development capabilities, the company achieved what few industrial company's from China have managed: to build a brand and a strong user community out of the Khadas business.Īfter months of consultation, tons of feedback from the market, and a lot of teasing online communities, Khadas is now accepting orders for the Tone2 Pro - the second generation Tone Board following the Tone1. In addition to OEM and ODM solutions, Wesion develops, manufactures and markets Amlogic and Rockchip single board computers (SBCs) for the open source community and streaming media player industry. Ltd.) founded in 2014 in Shenzen, China, is the company that owns the brand Khadas.