FX-AUDIO- FX-04J+ OPA627 x 3 NFJ Edition 32-bit High-End Mobile Audio DAC with ES9018K2M, USB Bus-Powered, High-Resolution Audio

Transitioning to a "Made-to-Order Model" from December 2019 This was previously sold as a special limited edition model, but in response to numerous requests for restocking, we will resume sales as a "Made-to-Order Model" from December 2019. Please note that while some components will be changed due to the change in batch, performance and sound quality will remain unchanged.

A major overhaul of the new batch will begin on sale from October 4, 2022. The circuit board has been redesigned, and the USB receiver IC has been changed from the "VT1728A" to the new-generation BRAVO "SA9023" IC. By switching to a new, well-established IC design and redesigning the circuitry, basic performance has been improved. ・Changed to the new-generation IC "SA9023" ・Redesigned main board

FX-AUDIO- FX-04J+ OPA627 x 3 NFJ Edition This compact, USB-connected, bus-powered D/A converter supports high-resolution audio sources (24-bit/96kHz) and employs the VIA VT1728A digital audio control IC and the ESS Technology ES9018K2M DAC IC.

Based on the popular "FX-04J," known for its high sound quality and affordable price, thorough refinements have been made to ensure optimal operation of the operational amplifiers, and the selected operational amplifiers have been further refined to further enhance sound quality.

This special limited edition model fully utilizes the potential of the ES9018K2M DAC by replacing all three of the main TL072 op-amps used in the base model FX-04J+ - two in the LPF circuit section and one in the differential-to-single-ended conversion section - with Burr-Brown OPA627AU (dual-circuit DIP version). The sound quality exceeds expectations for USB bus-powered operation, delivering a level of realism that makes you feel like you're listening to a performance right in front of you, while also offering easy portability. [Product Specifications] Brand: FX-AUDIO Model Number: FX-04J+ NFJ Edition Color: Black Warranty Period: 6 months from date of purchase Digital Input: USB Type B, USB 1.1/2.0 compatible, USB Audio Class 1.0 Analog Output: Stereo RCA Supported Formats: PCM up to 24-bit 96kHz DAC IC: ESS Technology ES9018K2M (DNR: +125dB / THD+N: -120dB) USB Receiver IC: Savitech BRAVO SA9023 (USB-DDC) Compatible OS: Windows 10/8 (8.1), 7/Vista/XP/2000, MacOS X/9.1 or later Accessories: Instruction manual, "NFJ Edition" logo sticker Dimensions: 51mm W x 78mm D x 21mm H (excluding protrusions) Weight: 80g Made-to-order model NFJ Special Edition with three OPA627s OPA627s are used in both the left and right independent LPF circuits and the differential conversion circuit! Further tuning of the power supply circuit ensures ideal performance Uses the ESS ES9018K2M DAC, a 32-bit high-end mobile audio DAC Optimal component configuration for audio