SPECIFICATIONS

Inputs:  USB Type-C/ Optical (SPDIF)/ Coaxial
Outputs:  RCA/ 3.5 mm/ Balanced Out/ XLR
Dimensions (W x H x D): 17.0mm x 88.0mm x 61.5mm / 68.0mm (with RCA)
D/A Converter:  ESS ES9038Q2M
Input Format:  MQA, AAC, FLAC, APE, WMA, WAV, OGG, MP3.
Bluetooth:  No
Processor:  XMOS XU216, 16 Real-time Logical Cores
DAC Chipset:  ESS ES9038Q2M 32-Bit Stereo Mobile Audio DAC
Rated Voltage:  DC 5V
Weight:  100 grams
Materials:  Aircraft-Grade Aluminum Enclosure & Silicone Foot Pad
Amplifier Chipsets: TI OPA1612 x2, RT6863D x3
Frequency Respond：
RCA Balanced：±0.15dB（20Hz～20KHz）
RCA Single End：±0.15dB（20Hz～20KHz）
4.4 Balanced：±0.15dB（20Hz～20KHz）
3.5 Single End：±0.2dB（20Hz～20KHz）
DNR：
RCA Balanced：121dB
RCA Single End：119dB
4.4 Balanced：121dB
3.5 Single End：119dB
Supported Sampling Rate：
USB：PCM 16-32bit/44.1-768KHz
DSD Native DSD64-DSD512;Dop DSD64-DSD256
Coaxial：PCM 16-32bit/44.1-192KHz
DSD 64（Dop）
4.4 Balanced Output Parameter：
Output Power and Out Voltage：
42mW（5.0Vrms）@600Ω
83mW（5.0Vrms）@300Ω
167mW（5.0Vrms）@150Ω
211mW（2.6Vrms）@32Ω
154mW（1.57Vrms）@16Ω
THD+N：
-116dB（0.000158%）@600Ω
-116dB（0.000158%）@300Ω
-116dB（0.000158%）@150Ω
-110dB（0.000316%）@32Ω
-105dB（0.000501%）@16Ω
SNR：121dB
Crosstalk：>117dB@32Ω
3.5 Single End Output Parameter：
Output Power and Out Voltage：
8.8mW（2.3Vrms）@600Ω
17.6mW（2.3Vrms）@300Ω
35.3mW（2.3Vrms）@150Ω
125mW（2.0Vrms）@32Ω
125mW（2.0Vrms）@32Ω
THD+N：
-114dB（0.0002%）@600Ω
-114dB（0.000158%）@300Ω
-114dB（0.000158%）@150Ω
-108dB（0.000398%）@32Ω
-103dB（0.000708%）@16Ω
SNR：119dB
Crosstalk：>69dB@32Ω

Features:

Unmatched Audio Quality
The Tone 2 Pro Desktop DAC&Headphone Amplifier is a mini audio converter adapter designed for audiophiles and music enthusiasts. It boasts a high-performance DAC chip, the ESS ES9038Q2M, which delivers superior audio quality. With a sampling rate of up to 768kHz/32bit and support for DSD512, the Tone2 Pro ensures that you experience your music in its purest form. The device also supports a wide range of audio formats, including MQA, AAC, FLAC, APE, WMA, WAV, OGG, and MP3, making it a versatile addition to your audio setup.

Advanced Connectivity and Compatibility
The Tone 2 Pro is not just about audio quality: it's also about versatility. With multiple inputs such as USB Type-C, Optical (SPDIF), and Coaxial, it's easy to connect to various devices, including your computer, smartphone, or tablet. The device also features a USB Type-A input, ensuring compatibility with a wide range of devices. The output options include Balanced Out, RCA, 3.5mm, and 4.4mm, catering to different headphone preferences and audio systems. The Tone2 Pro is compatible with both Windows and MacOS, making it a universal choice for audiophiles.

Built for Precision and Durability
The Tone 2 Pro is not just about sound: it's also about precision and durability. The device is crafted with aircraft-grade aluminum, ensuring a robust and durable build. The silicone foot pad provides stability and prevents vibrations, while the metal bottom cover adds to the device's durability. The Tone2 Pro is designed to deliver high-quality audio with minimal distortion, thanks to its advanced amplifier chipsets and low noise floor. Whether you're listening to your favorite tracks or enjoying a movie, the Tone2 Pro is the perfect companion for an immersive audio experience.

Pristine & Authentic Hi-Fi Experience

XMOS XU216 Audio DAC Chip with 16 cores & 16 threads
XMOS XU216 processor for MQA Full Decoder, PCM 768KHz and DSD 512 (Native). Enjoy digital master-quality audio.

ESS High Performance DAC Chip

Tone2 Pro continues with the time-tested ESS ES9038Q2M DAC chip paired with four TI OPA1612 operational amplifiers and three RT6863D power amplifiers at the buffer stage to provide balanced RCA output at ultra-low distortion (0.000126%) . Tone2 Pro can provide high power output and drive up to 300 ohm high-impedance Hi-Fi headphones easily, unlocking the true potential of your headphones for a high-fidelity listening experience.

Patented Balanced RCA

Balanced RCA is a new connector standard designed by Khadas with a 3-pin audio interface (positive / negative / ground). All metal contacts are gold-plated. Using a "Balanced RCA Male to XLR-3 Male Hi-Fi Audio Cable", Tone 2 Pro is able to output balanced audio to legacy XLR-3 equipment.

Solid Foundation 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.

Solid Foundation for a Low Noise Floor

Various audio components are carefully arranged on Tone2 Pro’s PCB layout. Two Accusilicon AS318-B 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, thus the data can be precisely shaped to achieve a unified clock.

Ultra-low Distortion Accurate Reproduction

Two NJU72315 audio volume control chips with extremely low-distortion are embedded in the analog circuit. These chips control the distortion within 0.00016% and provide linear volume control and accurate reproduction of audio sources.

The analog IV and LPF circuits use four high-performance TI OPA1612 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.

Couple Listening

Up to two people can listen together with a single Tone 2 Pro. There are two headphone jacks on the right-side, a 3.5mm single-end and a 4.4mm balanced. Listen with those we love.

The headphone jack uses three RT1238Q analog switches with a distortion of 0.000126%. These switches output high-quality audio signals and reduce the loudness of pop noises in the audio stream.

One-Piece Machined Aluminium Shell

Up to two people can listen together with a single Tone2 Pro. There are two headphone jacks on the right-side, a 3.5mm single-end and a 4.4mm balanced. Listen with those we love.

The headphone jack uses three RT1238Q analog switches with a distortion of 0.000126%. These switches output high-quality audio signals and reduce the loudness of pop noises in the audio stream.
The headphone jack uses three RT1238Q analog switches with a distortion of 0.000126%. These switches output high-quality audio signals and reduce the loudness of pop noises in the audio stream.

External Bluetooth Module Wireless in Seconds

BT Magic - a dedicated Bluetooth module developed for the Tone2 series which will be available soon supports AAC / SBC /

LDAC / aptX / aptX HD / aptX low latency and other common Bluetooth encoding formats. Tone2 Pro become wireless just in seconds with BT Magic, enjoy a wireless music experience.