FX-Audio DAC X6 Overview and Teardown Analysis
FX-Audio DAC X6
Tom Clark
Overview
●
Digital-to-analog converter with built-in amplifier
●
Meant for higher impedance headphones
○
In my case, my Drop K7XX headphones
●
Has three inputs: Optical, USB, and Digital Coax
●
Outputs to line-out RCA ports on the back as well
as to the headphones
X6 Teardown
●
Not much information available
○
Manufacture just has specifications but no parts list.
○
Found a teardown online (see picture)
●
VT1603 runs the USB interface and outputs the digital
signal to the CS8416
●
CS8416 MUXes the SPDIF, 1603, and coax digital
signals to a single serial audio which goes to the
CS4399
●
CS4399 acts as the primary DAC, taking the single
digital signal and outputting to analog
●
DAC output goes to OPA2134 for gaining
(potentiometer control) and filtering.
○
RCA outputs take from here.
●
OPA2134 goes to the 6120A which amplifies the
output for the headphones
Other information
●
From the TPA6120A2 datasheet:
●
This is an example setup using the amplifier
along with the OPA4134 Op-Amps for gaining
and filtering.
●
In the case of the X6, it is using the CS4399
for the DAC instead of the recommended
PCM1792 or DSD1792
●
The X6 also features a C1237 “speaker”
protection circuit
○
Power on delay of 3 seconds
○
Disconnection when power-off (stops pop)
○
Open protection for both positive and negative
offset voltage to headphones
FX-Audio DAC X6 is a digital-to-analog converter with a built-in amplifier designed for higher impedance headphones like the Drop K7XX. The device features multiple inputs including Optical, USB, and Digital Coax, with outputs to line-out RCA ports and headphones. A breakdown of the internal components reveals the use of VT1603 for USB interface, CS8416 for signal processing, CS4399 as the primary DAC, and OPA2134 for gain and filtering. The X6 also incorporates TPA6120A2 amplifier with OPA4134 Op-Amps for further enhancement. Additional features include a speaker protection circuit and power-on delay for safety.
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Presentation Transcript
FX-Audio DAC X6 Tom Clark
Overview Digital-to-analog converter with built-in amplifier Meant for higher impedance headphones In my case, my Drop K7XX headphones Has three inputs: Optical, USB, and Digital Coax Outputs to line-out RCA ports on the back as well as to the headphones
X6 Teardown Not much information available Manufacture just has specifications but no parts list. Found a teardown online (see picture) VT1603 runs the USB interface and outputs the digital signal to the CS8416 CS8416 MUXes the SPDIF, 1603, and coax digital signals to a single serial audio which goes to the CS4399 CS4399 acts as the primary DAC, taking the single digital signal and outputting to analog DAC output goes to OPA2134 for gaining (potentiometer control) and filtering. RCA outputs take from here. OPA2134 goes to the 6120A which amplifies the output for the headphones
Other information From the TPA6120A2 datasheet: This is an example setup using the amplifier along with the OPA4134 Op-Amps for gaining and filtering. In the case of the X6, it is using the CS4399 for the DAC instead of the recommended PCM1792 or DSD1792 The X6 also features a C1237 speaker protection circuit Power on delay of 3 seconds Disconnection when power-off (stops pop) Open protection for both positive and negative offset voltage to headphones
