睿志音响

	Wisdom in mind, enthusiasm at heart.

NFB-28 (ES9028Pro )

Discrete DAC+ Headphone amplifier / Preamplifier
With XLR / RCA analog inputs
DSD , DXD support from USB & I2S Input
32bit / 768K Sabre ES9028Pro
32bit / 384K Asynchronous Transfer XMOS U208 Chip

Summarize

Use Manual

Specs

Custom Option

Shipping Cost

Specifications might subject to change without prior notice for product improvement.
S/N Ratio	>120DB
THD	<0.001% (0DBV output level ,SPDIF input ) <0.0005% (0DBV output level ,XLR input )
Output impedance	2 ohm
Output Level	Headphone output : 19V RMS (balanced , max) Preamp Variable output (balanced) : 10V RMS (max) Preamp Variable output (RCA) : 5V RMS (max) ACSS： 2MA+2MA
Headphone amp output power level (Only for headphone.) Balanced mode	9500mW / 25 ohm 8000MW / 40 ohm 3500MW / 100 ohm 1200MW / 300 ohm 600MW / 600 ohm
Headphone amp output power level (Only for headphone.) Single ended mode	3600mW / 25 ohm 2500mW / 40 ohm 1100mW / 100 ohm 400mW / 300 ohm 200mW / 600 ohm
Digital Input Sensitivity	0.5 Vp-p(75 Ohms, Coaxial) 19 dBm (Optical)
Analog Input Sensitivity	0.7V to 5V RMS (RCA) 0.7V to 10V RMS (XLR)
Gain	+16DB
Frequency Response (DAC +AMP)	20Hz - 20KHz （<-0.05DB）
Support Operate Systems (USB)	Windows, Mac
Support Sampling	USB / I2S model: 44.1kHz, 48kHz, 88.2kHz, 96kHz, 176.4kHz , 192kHz, 352.8kHz,384kHz Coaxial model: 44.1kHz, 48kHz, 88.2kHz, 96kHz, 176.4kHz ,192kHz Optical model: 44.1kHz, 48kHz, 88.2kHz, 96kHz
Power Requirement	Version 1: 100-120V AC 50/60 Hz Version 2: 220-240V AC 50/60 Hz
Power Consumption	30W
Package Weight	Approximately 5KG
Dimensions	Approximately W240 X L360 X H80 (MM, Fully aluminium )
Accessories	AC power cord X1 USB cable X1