Fubar4

Fubar4 DAC + Headphone Amplifier
The Fubar4 is a superb 24Bit/96kHz 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

Features

USB input: Plug & Play via USB. Requires no addition software or drivers. 16 bit performance

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. 

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. 

Specifications

• Amplifier Structure : Coupling capacitor less, Push-Pull with Class-B
• Linear Output : RCA output 2Vrms, delay time phone out funtion
• Power Structure : Switching power supply, Soft-Star circuit
• Gain Control : Low (attenuation 20dB) / High (normal)
• Volume Control : Series / shunt mode selectable
• Headphone Impedence : 32 ohm to 600 ohm
• Circuit Protect : Output short / over current protect
• Support Format : 16-bit, 32 / 44.1kHz / 48kHz
• USB Chip : CMedia - CM108
• Receiver Chip : TI – DIR9001
• DAC Chip : TI – PCM1754
• LPF OPAmp : TI – OPA2134
• Main OPAmp : TI – OPA2604
• Servo OPAmp : TI - TL072

Audio Performance

Audio Performance SPDIF Coaxial / Optical input - RCA Line output (1kHz sine wave, 2Vrms output)

Frequency response (From 40Hz to 15kHz) : 40Hz +0.01dB, 15kHz -0.07dB

Noise level (1kHz, A-Weighted) : -95.4dB

Dynamic range (1kHz, A-Weighted) : 95.1dB

THD% : 0.0034%

Stereo crosstalk : -95.8dB

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Audio Performance Coaxial / Optical input - Headphone output (1kHz sine wave, 2Vrms output)

Frequency response (From 40Hz to 15kHz) : 40Hz +0.02dB, 15kHz -0.07dB

Noise level (1kHz, A-Weighted) : -94.0dB

Dynamic range (1kHz, A-Weighted) : 94.0dB

THD% : 0.0032%

Stereo crosstalk : -80.6dB

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Audio Performance USB input - RCA Line output (1kHz sine wave, 2Vrms output)

Frequency response (From 40Hz to 15kHz) : 40Hz +0.02dB, 15kHz -0.08dB

Noise level (1kHz, A-Weighted) : -93.8dB

Dynamic range (1kHz, A-Weighted) : 93.3dB

THD% : 0.0035%

Stereo crosstalk : -93.5dB

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Audio Performance USB input - Headphone output (1kHz sine wave, 2Vrms output)

Frequency response (From 40Hz to 15kHz) : 40Hz +0.02dB, 15kHz -0.08dB

Noise level (1kHz, A-Weighted) : -90.4dB

Dynamic range (1kHz, A-Weighted) : 90.4dB

THD% : 0.0038%

Stereo crosstalk : -80.7dB

Connectivity

USB input

S/PDIF Input Coaxial

S/PDIF input Toslink optical

Line Outputs RCA Jacks (1 set)

Headphone Jack 1/4" (6.4mm)

System Requirements

Intel® Pentium® 2, Celeron® 800MHz or higher computer system

Microsoft® Windows 2000® (Service Pack 4) or Windows® XP (Service Pack 1)

128MB RAM

Available USB port