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Fubar4 Plus DACs/Headphone AMP

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Firestone Audio Co., Ltd.

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Views: 9669
Last update: 2010-04-20

Feature
Fubar 4+ is a USB DAC Headphone Amplifier with Coaxial and Optical Input.
Fubar 4+ combines Fubar II USB DAC with Cute Curve Headphone Amplifier into one tiny unit. Using the Universal Serial Bus, users can simply plug and play without installing any drivers (with Linux, Mac OS or PC Windows system). With Coaxial and Optical Input (various kinds of input mode) users can select an ideal transfer medium (USB, Coaxial, or Optical Inputs) to satisfy the needs of sound quality. Up sampling make users feel the real, natural sound.

Technical Specifications
* Amplifier Structure : Coupling capacitor less, Push-Pull with Class-B
* Linear Output : RCA output 2Vrms, delay time phone out function
* 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
* USB Support Format : 16-bit, 32 / 44.1kHz / 48kHz
* SPDIF Support Format : 24-bit / 96kHz (MAX)
* Upsampling : Up to 192kHz
* Input Select : Auto Select, USB input is highest priority
* USB Chip : CMedia - CM108
* Reciver : TI - DIR9001
* ASRC Chip : TI - SRC4192
* DAC Chip : TI - PCM1793
* LPF OPAmp : NS - LM4562
* Main OPAmp : TI ? OPA2604
* Servo OPAmp : TI - TL072

Audio Performance - Coaxial / Optical input - Line output (1kHz sine wave, 2Vrms output, 24-bit / 48kHz)
Frequency response (From 40Hz to 15kHz) : 40Hz +0.01dB, 15kHz -0.03dB
Noise level (1kHz, A-Weighted) : -111.9dB
Dynamic range (1kHz, A-Weighted) : 111.6dB
THD% : 0.0018%
Stereo crosstalk : -111.0dB

Audio Performance - Coaxial / Optical input - Phone output (1kHz sine wave, 2Vrms output, 24-bit / 48kHz)
Frequency response (From 40Hz to 15kHz) : 40Hz +0.01dB, 15kHz -0.03dB
Noise level (1kHz, A-Weighted) : -99.7dB
Dynamic range (1kHz, A-Weighted) : 99.6dB
THD% : 0.0020%
Stereo crosstalk : -90.0dB

Audio Performance - USB input - Line output (1kH

Specifications > Amplifier > Fubar4 Plus DACs/Headphone AMP
Manufacturer	Firestone Audio Co., Ltd.
Model name	Fubar4 Plus DACs/Headphone AMP
Catalog No.	4716329380070
Kind of amplifier	Headphone amplifier
Type	Digital
Number of channels	2
Class	B
Total Harmonic Distortion (THD)	0.0018 %
Signal to noise ratio	-111.9 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
Available front panel colors	Silver/Black
Available front panel materials	Alumi
Dimensions (Height/Width/Depth)	7.7/7.8/10.7 cm
Fubar4 Plus 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 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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