High Fidelity Audio
Tone2 utilizes the powerful XMOS XU208 processor with 8 cores & 8 threads for high performance bit-perfect decoding. Decode up to 768KHz PCM and DSD 512 (Native) audio files and enjoy digital master quality audio.
High Performance ESS DAC
Tone2 has been engineered for audio perfection. The powerful ESS ES9038Q2M DAC chip is paired with two TI OPA1612 operational amplifiers and two Ricore RT6862 operational amplifiers.
for a Low Noise Floor
A pair of low noise LDOs manufactured by ADI supplies power to the operational amplifiers. The DAC's analog output reference supply is channeled through ultra-low noise (1.2uVrms) LDO ES9311Q, with low loss, low temperature drift, and long life film capacitors to ensure the stability and reliability of the power supply, effectively controlling the noise from the original stage.
Precise Clock Management
Various audio components are carefully arranged on Tone2’s PCB layout. Two Accusilicon AS318-L series, active crystal oscillators with low phase noise and low jitter and one SiTime SiT8209 high performance active crystal oscillator at 100M enhance the low noise characteristics. The phase jitter is controlled within 0.5ps and the frequency drift is only ±10PPM. This ensures that the time interval of each sample is more stable, so that the analog audio signal can be returned more clearly.
The analog IV and LPF circuits use two high-performance TI OPA1612 operational amplifiers and two Ricore RT1238 operational amplifiers, with 28 high-precision resistors at an accuracy of 0.1% and a low temperature drift of ±25PPM. This provides an accurate and stable RCA output.
Selecting Power Supply
Tone2 is powered by USB-C (USB) or I2S (Linear Power Supply), with a power path management chip from Texas Instruments. Power selection is easy.
* Linear power supplies require a Khadas-designed USB-C cable, which will be available soon.
Multiple Input/Output Methods
Tone2 has multiple I/O interfaces on its compact chassis.
Input: USB, S/PDIF, Bluetooth (w/ BT Magic)
Output: Balanced RCA, Single-end RCA
With Tone2, you will have the freedom to switch between a variety of audio input and output sources easily.
Total Harmonic Distortion (THD+N):
Balanced RCA: -118dB
Single-end RCA: -116dB
Maximum DAC Line-Output:
Balanced RCA: 4Vrms@200KΩ
Single-end RCA: 2Vrms@100KΩ