睿志音响

	Wisdom in mind, enthusiasm at heart.

NFB-20.2

Discrete DAC+ Headphone amplifier / Preamplifier
Supports full speed Asynchronous Transfer Mode
Built in the Tenor TE8802 chip
Built in 2 Pieces Hi-end grade WM8741 Chips

Price: USD1480 (With remote control)

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Frequency response diagram from RCA / XLR /ACSS output: ( Click to zoom)
Display OS=8, Filter = 1 :	Input sampling 44.1KHz,24Bit, -2.5DB at 20KHz	Input sampling 48KHz,24Bit, -0.2DB at 20KHz , -3DB at 23KHz
8X oversampling , Minimum phase apodising filter. Support up to 48KHz .

Display OS=8, Filter = 2 :	Input sampling 44.1KHz,24Bit, -0.2DB at 20KHz , -3DB at 25KHz	Input sampling 48KHz,24Bit, -0.2DB at 20KHz , -3DB at 25KHz
8X oversampling , Linear phase apodising filter. Support up to 48KHz .

Display OS=8, Filter = 3:	Input sampling 44.1KHz,24Bit, -2.5DB at 20KHz	Input sampling 48KHz,24Bit, -0.2DB at 20KHz , -3DB at 23KHz
8X oversampling , Linear phase half-band filter for backward compatibility. Support up to 48KHz .

Display OS=4, Filter = 1:	Input sampling 44.1KHz,24Bit, -3DB at 15KHz	Input sampling 48KHz,24Bit, -3DB at 17KHz	Input sampling 96KHz,24Bit, -0.2DB at 20KHz , -3DB at 31KHz
4X oversampling , Minimum phase 'soft-knee' filter. Support up to 96KHz .

Display OS=4, Filter = 2 :	Input sampling 44.1KHz,24Bit, -3DB at 15KHz	Input sampling 48KHz,24Bit, -3DB at 17KHz	Input sampling 96KHz,24Bit, -0.2DB at 20KHz , -3DB at 31KHz
4X oversampling , Linear phase 'soft-knee' filter. Support up to 96KHz .

Display OS=4, Filter = 3 :	Input sampling 44.1KHz,24Bit, -2.8DB at 20KHz	Input sampling 48KHz,24Bit, -0.3DB at 20KHz , -3DB at 24KHz	Input sampling 96KHz,24Bit, -1DB at 20KHz , -3DB at 42KHz
4X oversampling , Linear phase 'brickwall' filter. Support up to 96KHz .

Display OS=2, Filter = 1:	Input sampling 44.1KHz,24Bit, -3.2DB at 20KHz	Input sampling 48KHz,24Bit, -2.5DB at 20KHz , -3DB at 22KHz	Input sampling 96KHz,24Bit, -0.5DB at 20KHz , -3DB at 25KHz
2X oversampling , Minimum phase 'soft-knee' filter. Support up to 192KHz .

Display OS=2, Filter = 2:2 :	Input sampling 44.1KHz,24Bit, -3.5DB at 20KHz	Input sampling 48KHz,24Bit, -2.7DB at 20KHz	Input sampling 96KHz,24Bit, -0.8DB at 20KHz , -3DB at 25KHz
2X oversampling , Linear phase 'soft-knee' filter. Support up to 192KHz .

Display OS=2, Filter = 3 :	Input sampling 44.1KHz,24Bit, -2.5DB at 20KHz , -3DB at 22KHz	Input sampling 48KHz,24Bit, -2DB at 20KHz , -3DB at 23KHz	Input sampling 96KHz,24Bit, -0.2DB at 20KHz , , -3DB at 40KHz
2X oversampling , Linear phase 'brickwall' filter. Support up to 192KHz .

Improvement may result in changes in specifications and design without notice.
S/N Ratio	>120DB
Gain	+7 DB (70 steps volume control) (XLR) +13DB (99 steps volume control) (XLR)
Volume characteristic	Linear @ 70 steps Exponent @ 99 steps
Channels cross	> 130DB
Channels imbalance	< 0.05DB
Frequency Breadth	20Hz - 20KHz (< - 0.1DB) 1Hz - 140KHz ( - 3DB )
Output Level	Headphone output : 22V RMS (balance , max) Preamp Variable output : 10V RMS (balance, max) DAC Variable output : 5 V RMS (balance, max) ACSS： 2MA+2MA
Headphone amp output power ability (Only headphone.) Balanced mode	6000MW / 50 ohm 3500MW / 100 ohm 1200MW / 300 ohm 600 MW / 600 ohm
Output impedance	1 ohm / Headphone output 1 ohm / DAC output
Input Sensitivity	0.5 Vp-p(75 Ohms, Coaxial) 19 dBm (Optical) USB1.1 ,USB2.0 (Full Speed, Class 2)
Support Sampling	USB model : 44.1kHz, 48kHz, 88.2kHz, 96kHz, 176.4kHz, 192kHz SPDIF model: 44.1kHz, 48kHz, 88.2kHz, 96kHz, 192kHz Optical model: 44.1kHz, 48kHz, 88.2kHz, 96kHz
Power Requirement	1 Version 100-120V AC 50/60 Hz 2 Version 220-240V AC 50/60 Hz
Power Consumption	35W
Package Weight	Approximately 15KG
Dimensions	W430 X L430 X H93(MM, Fully aluminium )
Accessories	AC power cord X1 USB cable X1 Optical cable X1
Operating Temperatures	+5 °C to +40 °C
Operating Humidity	5 % to 90 % (without dew)