【Voltage Compatibility】
When using electrical appliances, please note that they are designed for Japanese voltage specifications (90-110V), so if you use them with a different voltage, it may cause a malfunction.
【Plug Type】
Our products use Japanese plug types (A or B type).
Please use a conversion adapter if necessary.
【Important Note on Transformers and Adapters】
A transformer adjusts voltage to match your device’s requirements.
A conversion adapter only changes the plug shape and does not adjust voltage.
Using only a conversion adapter without a transformer may result in damage to the product.
【Liability】
We are not responsible for malfunctions or damages caused by improper use, such as operating the product without a transformer.
[About clocks that synchronize time via radio waves]
The function of clocks that synchronize time via radio waves only works in the Japanese area. Please be careful.
Achieving ideal operation through further tuning of the power supply circuit
Adopts 32bit high-end mobile audio DAC ESS manufactured by ES9018K2M
Output coupling-less specification, component configuration ideal for audio
Left and right independent operational amplifier LPF circuit & operational amplifier differential conversion circuit
Significant renewal to new lot from September 27, 2022 sales
We redesigned the board circuit and changed the USB receiver IC from "VT1728A" to the new generation BRAVO "SA9023".
Basic performance has been improved by changing to a newly designed and well-established IC and renewing the circuit.
・Change to new generation IC “SA9023”
・Renewal of main board
The most popular mobile DAC has evolved with improved sound quality!
The most popular FX-04J, which is equipped with an ultra-high-performance DAC IC that exceeds high-end audio, but at an affordable price, has evolved into the FX-04J+ by thoroughly reviewing the details to obtain the ideal operational environment for operational amplifiers!
The USB bus-powered operation delivers sound quality that exceeds common sense, giving you the reality of playing right in front of your eyes, and the convenience of being easy to carry.
[About ES9018K2M] Currently, the main audio battleground is shifting from indoor to mobile. It is still fresh in my memory that ESS announced the 32-bit SABER32 2M DAC "ES9018K2M".
The SABER32 2M DAC series uses ESS's patented technology Hyperstream and Time Domain Jitter Eliminator to achieve wide DNR, low jitter, and low power consumption. These technologies have been applied not only to professional audio equipment, but also to mobile devices, taking advantage of their low power consumption, and have led to the evolution of mobile audio itself.
[Main IC specifications] ■USB receiver IC (DDC): Savitech BRAVO SA9023
Supported formats: up to 24bit/96kHz
■DAC IC: ES9018K2M manufactured by ESS Technology
DAC IC for high-end audio
Dynamic range: 127dB
THD+N: -120dB
■LPF circuit operational amplifier: Texas Instruments TL072
Left and right channel independent design
■Reference voltage generation operational amplifier: JRC NJM4580
■Differential conversion unit operational amplifier: Texas Instruments TL072
[Notes]
*If the sound no longer comes out, please check the USB recognition status and the audio output destination settings.
*The LED indicator on the left side of the USB terminal lights up when power is applied. (Does not blink!)
Old USB cables have deteriorated. Please use a new cable as this may cause problems such as noise, audio interruptions, and poor recognition.
*If there is an abnormality in volume, noise, or no sound, there is a problem with the connection cable, so please replace it.
*When operating the power supply, first turn off the power to the amplifier connected to the output side.
[Product specifications]
Brand: FX-AUDIO-
Product model number: FX-04J+
Color: black
Product warranty period: 6 months from the date of purchase
Digital input: USB TypeB terminal USB1.1/2.0 compatible USB audio class 1.0
Analog output: stereo RCA terminal
Supported format: PCM maximum 24bit 96kHz
DAC IC: ESS Technology ES9018K2M (DNR: +125dB / THD+N: -120dB)
USB receiver IC: Savitech BRAVO SA9023 (USB-DDC)
Compatible OS: Windows 11/ 10/ 8 (8.1) & 7/ Vista / XP / 2000 / MacOS X / 9.1 or later
Accessories: Instructions
Size: Width 51mm x Depth 78mm x Height 21mm (excluding protrusions)
Weight: 80g
