Del modelo de 2014
Summarize
Fully balanced design built by discrete analog stages without any OPA and coupling caps in the signal channels, built in real balanced DAC. Output for headphone (4-pin XLR or 1/4") and DAC (fixed output) with preamp (variable output)Non- feedback ACSS analog output stage .
LED display avoids RF disturbance for better sound quality
Large R-core transformers and Hi-fi grade parts like DALE resistors, WIMA caps .
Total of 6-group PSUs are used to purify the power supply , the analog amp has discrete PSU power supply
Four-channel digitally controlled relay-based volume control to avoid channel imbalance and improve sound quality.
80 steps volume level control in both high gain mode and low gain mode. 160-step volume control ensures smooth control of the volume level.
4 digital inputs: Coaxial RCA / Coaxial BNC / Optical / USB
2 analog inputs: XLR / RCA
DAC output: XLR / RCA / ACSS (User can set either variable output level as preamp or fixed output level as dedicated DAC )
Headphone output : 4 pin XLR / 1/4" (6.3MM) SE
Static storage mode control software for avoid disturb sound quality , the MCU output once control data and save in the perform parts ,then stop output data until users next operation.
http://www.audio-gd.com/Pro/Headphoneamp/NFB28/NFB28EN.htm