The INFRASONIC QUARTET is a multi purpose pro audio interface card using stable PCI bus technology. QUARTET provides high quality, multi-function, sound editing for your home studio.

Extended information

QUARTET has better performing analog I/Os than other cards in its class. It supports a 192 kHz ADC sample-rate with full 24-bit recording. The high-quality AD/DA converter has 115dB signal-to-noise (S/N) ratio. The high-end components in the analog circuit improve dynamic range by 10dB.

Other features include a MIC preamp, direct instrument input, MIDI I/O, Coaxial I/O, Word clock I/O and Dual Headphone amplifiers QUARTET is professional gear that will satisfy in features, performance and convenience.

* Total 4 x 4 channel 24-bit/192kHz Audio Interface
* 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
* 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
* FREE Mixer
* Virtual Channel Function
* Support ASIO2, GSIF2, WDM, DirectSound

Technical specifications

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-AMPLIFIER
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 Instrument 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 REQUIREMENTS
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