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Fubar4 DACs/Headphone AMP

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Firestone Audio Co., Ltd.

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Views: 7791
Last update: 2010-04-20

Feature
Fubar 4 is an advanced version of Fubar III which is a USB DAC Headphone Amplifier.
Fubar 4 combines Fubar II USB DAC with Cute Curve Headphone Amplifier into one tiny unit.
Using the Universal Serial Bus you can simply plug and play without installing any drivers (with Linux, Mac OS or PC Windows system). Adopting two DAC chips can separate the digital signals to decrease the effects of sharing the analogy signals in order to make you enjoy the natural and clear sound.

Technical 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 Coaxial / Optical input - 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

Audio Performance Coaxial / Optical input - Phone 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

Audio Performance USB input - 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

Audio Performance USB inpu

Specifications > Amplifier > Fubar4 DACs/Headphone AMP
Manufacturer	Firestone Audio Co., Ltd.
Model name	Fubar4 DACs/Headphone AMP
Catalog No.	4716329380063
Kind of amplifier	Headphone amplifier
Type	Digital
Number of channels	2
Class	B
Total Harmonic Distortion (THD)	0.0034 %
Signal to noise ratio	-95.4 dB
Frequency response	from 40 Hz to 15 kHz
Source direct	No
Balance	No
Treble / Bass	No
Loudness	No
Source selector	No
Standby mode	No
Remote control	No
Phono input	No
Dimensions (Height/Width/Depth)	7.7/7.8/10.7 cm
Fubar4 DACs/Headphone AMP > Firestone Audio Co., Ltd.

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AMPLIFIERS:	Fireye1 Micro Headphone AMP \| Fireye2 USB DAC/Headphone AMP \| Fubar2 USB DAC \| Fubar3 USB DAC/Headphone AMP \| FubarI/O DAC/ADC \| Fubar4 Plus DACs/Headphone AMP \| Spitfire DAC \| Korora MC/MM Phono AMP \| Bravo 24bit/96kHz Digital Processor \| Cute Beyond Headphone \| Cute Curve Headphone AMP \| Mass Remote Pre-AMP \| Bigjoe2 Power AMP \| Bigjoe3 Digital Power AMP \|
SPEAKERS:	None

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