Fubar4-Plus

This is the new 2009 "Fubar4-Plus" DAC + integrated Headphone Amplifier
The Fubar4-Plus is a superb 24Bit/192kHz upsamplig DAC + Integrated Headphone amplifier + RCA outputs (analog) to connect to your audio rig. You get HiFi music direct from your PC to connect to your home stereo, or you can use the built-in headphone ampifier to drive your headphone. Sound source can be USB or S/PDIF, coaxial as well as optical.
The 192 kHz upsampling will give you the clearest sound you heard from a digital source !


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Features

	USB input: Plug & Play via USB. Requires no addition software or drivers
	S/PDIF inputs: Digital inputs for both Digital Coax and Optical, with 24 Bit 96kHz DAC.
	Headphone Output: 1/4" (6.4mm) headphone jack. This amplifier will perfectly drive bigger audiophile headphones with ease.
	Gain Switch: External gain switch to optimize with your headphones. Compatible with 32 - 600 Ohm impedance.
	192 kHz Upsampling: Will give you more natural performance.
	RCA Outputs: Gold Plated RCA outputs to connect to your home stereo for playback over speakers.
	Volume Control: Controls headphone output only, not the line-out RCA outputs, wich are fixed level line-out
	Changeable OpAmps: The OPA2604 OpAmp in the headphone amplifier are changable.
	Color of faceplate: Available in your choice of Black and Silver face plates.

Specifications

	Amplifier Structure: Coupling Capacitor Less / Push-Pull
	Line Level Output: RCA output 2 Vrms
	Gain Control: High setting (normal) / Low setting provides 20dB attenuation
	Volume Control: Series / Shunt - user selectable (default is Series)
	Headphone Impedance: 32 Ohm to 600 Ohm
	Circuit Protection: Output Short / Over Current Protection
	USB Support Format: 16 Bit - 32 / 44.1 / 48 kHz (compatible with Windows, Mac and Linux)
	S/PDIF Support Format: 24 Bit / 96 kHz
	Upsampling: up to 192 kHz
	Input select: Auto Select - USB highest priority
	USB Chip: CMedia - CM108
	Reciever: Texas Instruments - DIR9001
	ASRC Chip: Texas Instruments - SRC4192
	DAC Chip: Cirrus Logic - CS4344
	LPF OpAmp: National Semiconductor LM4562
	Main OpAmp: Texas Instruments OPA2604
	Servo OpAmp: Texas Instruments TL072

Audio Performance

	*S/PDIF (Digital Coax and Toslink Optical input) - RCA outputs* -** (1 kHz Sinewave) 2 Vrms
	Frequency response (From 40Hz to 15kHz) : 40Hz +0.01dB, 15kHz -0.03dB
	Noise Level: (1 kHz A-weighted) -111.9 dB
	Dynamic Range: (1 kHz A-weighted) -111.6 dB
	THD%: 0.0018%
	Stereo Crosstalk: -111.0 dB
	----
	S/PDIF (Digital Coax and Toslink Optical input) - Headphone output (1 kHz Sinewave 2 Vrms)
	Frequency response (From 40Hz to 15kHz) : 40Hz +0.01dB, 15kHz -0.03dB
	Noise Level: (1 kHz A-weighted) -99.7 dB
	Dynamic Range: (1 kHz A-weighted) -99.6 dB
	THD%: 0.0020%
	Stereo Crosstalk: -90.0 dB
	----
	USB Input - RCA outputs (16 Bit / 48 kHz)
	Frequency response (From 40Hz to 15kHz) : 40Hz +0.01dB, 15kHz -0.03dB
	Noise Level: (1 kHz A-weighted) -96.2 dB
	Dynamic Range: (1 kHz A-weighted) -96.2 dB
	THD%: 0.0017%
	Stereo Crosstalk: -94.1 dB
	----
	USB Input - Headphone output (16 Bit / 48 kHz)
	Frequency response (From 40Hz to 15kHz) : 40Hz +0.01dB, 15kHz -0.03dB
	Noise Level: (1 kHz A-weighted) -92.1 dB
	Dynamic Range: (1 kHz A-weighted) -91.6 dB
	THD%: 0.0020%
	Stereo Crosstalk: -90.0 dB