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INFRASONIC QUARTET is a multi purpose pro audio interface card
using stable PCI bus technology
QUARTET is suitable for providing high quality, multi function,
sound editing for your home studio and at a good price

QUARTET has better performing analog I/O’s than other cards in its class
It supports 192 kHz ADC sample-rate with Full 24-bit recording
The high-quality AD/DA converter has 115dB S/N ratio and the high-end components in the analog circuit improve dynamic range by 10dB

Other features include MIC preamp, Direct Instrument input,
MIDI I/O, Coaxial I/O, Word clock I/O and Dual Headphone amplifiers
QUARTET will satisfy a user as professional gear in feature,
performance and convenience

  
       
  Total 4 x 4 channel 24-bit/192kHz Audio Interface
           (PCI Local Bus Spec. 2.2 compliant)
        ● PCI Slot compatibility designed to suit +3.3V and/or +5V PCI slot
        ● Precision low noise Microphone preamplifier
           with +48V phantom and Low cut
        ● Built-in Selectable Direct Instrument Input
        ● Built-in high quality Dual Headphone amplifier
        ● High quality Audio-Converters and expert analog technology
        ● ADC : 113dB dynamic range (up to 24-bit/192kHz)
        ● DAC : 115dB dynamic range
        ● Hardware mixer for direct monitoring.
        ● Uses Cross-Latch type 1/4" TRS Stereo jack for reliable analog I/O
        ● 2 Stereo unbalanced analog inputs (1/4" TRS Stereo, -10dBV)
        ● 2 Stereo unbalanced analog outputs (1/4 TRS Stereo, -10dBV)
        ● RCA connector for Coaxial I/O (Support up to 192kHz)
        ● Shutter type optical output jack for S/PDIF output
        ● Supports pass-through AC-3/DTS
        ● Word Clock I/O : Fs / 256*Fs, BNC Connector
        ● 16 channel MIDI I/O
        ● FREE Mixer
        ● Virtual Channel Function
        ● Support ASIO2, GSIF2, WDM, DirectSound
        ● Support for Windows® XP, 2000
  
       
   
  The QUARTET is equipped with ‘US-PSB class I’ based on OP-AMP discrete circuits instead of a general regulator type IC
        First of all, as it reduces noise of output, and power noise is decreased over 10dB
        Mass storage capacitors and protection circuits effectively deal with electronic shock and noise
        It can be monitored in detail by the powerful drivers and OP-AMP circuitry. It keeps a very stable power flow
        In addition, it has the function of slowly rising voltage, called ‘Slow slope ON’
        This protects monitor speakers and headphones from being damaged by that ‘pop-noise’ when you turn on your PC		  
       
 


IS Microphone Preamplifier - a low noise transistor buffer, high quality
mic-preamp. (E.I.N: Equivalent input noise -127dBu)
Not only is the value of E.I.N 20dB lower but, its quality of CMRR
and frequency response is better than other similar grade products
It delivers professional recording studio quality audio

PAD/GAIN jumper can be used with many types of microphones
(from the condenser microphones to low leveled dynamic microphones)
Like a professional MIC preamplifier, QUARTET supports the Low-cut function and +48V phantom power

Generally, there is a lot of high frequency digital noise in the inside of a Computer Especially if you have more PCI cards close to one another

Noise Guard Bracket is designed to protect QUARTET from electronic noise that the computer and other PCI/video cards can generate

        In the analog output circuit of the QUARTET there is no need to classify
        between Line output and Headphone output
        The output jacks automatically know the difference  between stereo
        headphone jacks or line outputs  to your speakers or mixer

        A Noise shaping filter and High grade Film-capacitors
        in the output ports can block ‘Quantization noise ‘in the DAC perfectly.
        (Digital Audio Converters)
        With a wide Frequency response, it plays back sound as real as
        possible

 

With the FREE mixer, it is possible to connect to every part of the Hardware in/out, WDM, ASIO2, GSIF2 drivers to themselves
You can use them altogether to mix and route them in two styles of
user interface
According to set it up, It can be used as input monitor, sub mixer, connection driver to driver or any purpose you want


The QUARTET has 4X4 physical channels
In the other hand, QUARTET also supports virtual extended 8X8 channels, which can be made by easily mapping through the FREE mixer

 
       
 




 

  ANALOG LINE INPUT

  Type

  2 x Unbalanced 1/4” Stereo Input

  Level

  -10dBu Nominal (@-18dBFS) , +10.4dBu max, deviation +/- 0.1dB

  Frequency Response

  20Hz to 20kHz, +/- 0.05 dB

  THD + N

  0.0012 dB % A-weighted (1kHz @ -3dBFS)

  Dynamic Range

  110 dB A-weighted (1kHz @ -60dBFS)

  Impedance

  10k ohm

  A/D Converter

  Type
  Dynamic Range
  S/(N+D) Ratio
  Interchannel Isolation

  24bit, 192KHz
  110/113dB (@ -60dBFS A-Weighted)
  -90/-100dB (@ -1dBFS, measurement method)
  105dB

  ANALOG LINE OUTPUT

  Type

  2 x Unbalanced 1/4” Stereo Output

  Level

  -10dBu Nominal (@-18dBFS) , +10.2dBu max, deviation +/- 0.1dB

  ATT Range

  0dB ~ -48dB (255 linear step size)

  Frequency Response

  20Hz to 20kHz, +/- 0.02 dB

  THD + N

  0.0012 % A-weighted (@ -3dBFS)

  Dynamic Range

  113dB dB A-weighted

  Load Impedance

  32 ~ 600 ohm (1/4” Stereo)

  D/A Converter

  Type
   Dynamic Range
   S/(N+D) Ratio
  Interchannel Isolation

  24bit, 192KHz 8 times digital filter
  115dB (@ -60dBFS with A-Weighted)
  -97dB (@ -1dBFS, measurement method)
  110dB

  MICROPHONE PRE

  Type

  Balanced TRS (+48V Phantom Power support)

  Max Input Level

  -2dBu max (PAD OFF), +17.0dBu max (PAD ON)

  Gain Range

  +20dB / +40dB / +60dB (PAD OFF), 0dB min ~ +40dB max

  Equivalent Input Noise

  -127 dBu (22kHz BW, +60dB Gain, 150 ohm)

  THD + N

  0.002% A-weighted (1kHz @ gain +20dB)

  Frequency Response

  10Hz ~ 50kHz @+50dB (40Hz~15kHz : +0.06, -0.58dB)
  Low Cut Freq : 75Hz @+3dB

  Impedance

  1.5K Ohm

  Hi-Z Instruments) INPUT

  Type

  Unbalanced 1/4”

  Level

  -16dBu Nominal (@-16dBFS) , +2.4dBu max

  Frequency Response

  20Hz to 20kHz, +/- 0.24 dB

  THD + N

  0.06% A-weighted (1kHz @ -3dBFS)

  Dynamic Range

  TBD dB A-weighted (1kHz @ -60dBFS)

  Impedance

  150K Ohm

  MIDI I/O

  Type

  5P-DIN Standard MIDI Connector

  DIGITAL I/O

  Type

  RCA (Coaxial) / Optical Jack

  Impedance

  75ohm

  Format

  IEC-60958 Professional / Consumer

  Sample rate

  44.1kHz, 48.0kHz, 88.2kHz, 96.0kHz, 192kHz

  MINIMUM SYSTEM REQUIREMENT

  Intel Pentium 4 or equivalent and compatible CPU
  Motherboard with chipset supporting the Intel Pentium 4
  256MB of RAM
  One available PCI slot
   Microsoft Windows®XP, 2000 operating system


 
     
     
  latest update: 23 November, 2007
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