Tone2

Tone2 is our second-generation Tone Board from Khadas that incorporates a variety of user feedback from our first-gen product, the Tone1. 

ESS ES9038Q2M DAC has been paired with two powerful OPA1612 operational amplifiers and two RT6862 operational amplifiers. 

The Tone2's aluminum enclosure incorporates a hybrid digital/analog volume control knob, allowing you to rely entirely on analog signal attenuation for accurate sound reproduction. With not one, but two USB-C ports, you can 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. Finally, we've added an industry-first balanced RCA line-out. These novel RCA ports have three signal pins instead of two, yet retain the same size and form factor as regular RCA ports.

This time, we will also provide a Maker Kit version which provides more possibilities for Geeks, DIYers & OEM Customers. The Tone2 Maker Kit provides our customers with a range of expansion and connectivity options. An external power supply can be attached to the 4-pin VIN input (bottom).

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Interfaces:

• 30-pin 0.5mm FPC Connector: UART, I2S, I2C (MCU)
• 4-pin VIN Connector: DC Input, Rated Voltage 4.8V-14.0V
• 40-pin 2.54mm Header: USB 2.0, I2S, UART, 5.0V
• 14-pin 0.5mm FPC Connector: USB 2.0, I2C (MCU), 3.3V
• 14-pin 0.5mm FPC Connector: XMOS JTAG, CPLD JTAG

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Files & Documents:

• USB Driver
• DFU Tool
• User Manual
• Specs 

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What's in the Box of Tone2:

• x1 Tone2
• x1 USB-C Cable (Type-C to C)
• x1 Instruction Manual
• x1 Warranty Card

Note: For Tone2 maker kit, the USB-C Cable (Type-C to C) is not included in the package.

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Compatibility (Tone2 Maker kit):

• VIM4 
• VIM3 
• VIM1S

Note: 40-pin 2.54mm GPIO Header can be connected to VIM1S/VIM3/VIM4 but DIYers need to solder a female connector onto Tone2; 14-pin 0.5mm FPC Header can be connected to VIM3/VIM4 via a T2V Extension Board from Khadas.

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Accessories (sold separately):

• Bal-RCA to XLR-3 Male 0.2m Converter / 1.0m Cable
• Bal-RCA Plugs and Jacks for DIY projects
• BT Magic
• T2V Extension Board