• Input Connector USB type B port
• Codec 16 bit, 48 Khz
• Input Impedance 10k Ohms Transformer Balanced
• Output Impedance 300 Ohms Transformer Balanced
• Input Level Maximum nominal 0dB
• Output Level Maximum nominal 0dB
• Output Noise
• USB - System dependent
• ISO transformer - Environment sensitive
• Frequency Response 20 - 20 KHz ± 0.5 dB
• Power Operating current via USB Port 80mA

Input Connectors

• 2 x Female XLR, wired Pin 2 + Hot, Pin 3 Cold. Pin 1 via Ground Lift switch

Output Connectors

• 2 x Male XLR, wired Pin 2 + Hot, Pin 3 Cold. Pin 1 via Ground Lift switch

Construction
All-steel powder coated chassis, fiberglass PCB, epoxy printing, slip-resistant rubber feet.

System Requirements

• Windows PC running Windows 98SE, ME, XP or Vista
• USB port
• Audio software installed

98SE will need the Win 98SE CD Rom to install driver.

• Input Connector USB type B port
• Output Impedance 300 Ohms Transformer Balanced
• Output Level Maximum nominal output level 0dB
• Output Noise
• USB - System dependent
• ISO transformer - Environment sensitive
• Frequency Response 20 - 20 KHz ± 0.5 dB
• Power Operating current via USB Port 80mA

Output Connectors

• 2 x Male XLR, wired Pin 2 + Hot, Pin 3 – Cold. Pin 1 Floating (not connected)

Construction
All-steel powder coated chassis, fiberglass PCB, epoxy printing, slip-resistant rubber feet.

System Requirements

• Windows PC running Windows 98SE, ME, XP or Vista
• USB port
• Audio software installed

* 98SE will need the Win 98SE CD Rom to install driver.

• Input Connector USB type B port
• Output Impedance 300 Ohms Transformer Balanced
• Output Level User variable from 0dB down to infinity (off)
• Output Noise
• USB - System dependent
• ISO transformer - Environment sensitive
• Frequency Response 20 - 20 KHz ± 0.5 dB
• Power Operating current via USB Port 80mA

Output Connectors

• 2 x Male XLR, wired Pin 2 + Hot, Pin 3 – Cold. Pin 1 Chassis Ground

Construction
All-steel powder coated chassis, fiberglass PCB, epoxy printing, slip-resistant rubber feet.

System Requirements

• Windows PC running Windows 98SE, ME, XP or Vista
• USB port
• Audio software installed

* 98SE will need the Win 98SE CD Rom to install driver.

• Input Impedance 10K Ohms Balanced TRS jack; Unbalanced RCA
• Output Impedance 10K Ohms (User variable) Balanced jack
• Unbalanced RCA
• Input Headroom (max) +12dB
• Input Attenuation User variable from 0db to infinity (off)
• Frequency Response 20Hz - 20 KHz ± 0.5dB
• THD at Max Output 0.2% 30 Hz - 20KHz
• Insertion Loss 0.75dB @ 1 KHz (600 Ohm source)
• Input Connectors Balanced TRS jack, wired Pin Sleeve Ground, Tip + Hot, Ring – Cold.
• Unbalanced RCA wired Tip: Hot, Sleeve: Cold

Output Connectors

• Dual stereo RCA connectors
• Balanced TRS jack, wired Pin Sleeve Ground, Tip + Hot, Ring – Cold.
• Unbalanced RCA wired Tip: Hot, Sleeve: Cold

Construction
All-steel powder coated chassis, fiberglass PCB, ultra low noise audio transformer

• Input Impedance 600 Ohms
• Output Impedance 600 Ohms
• Frequency Response 20Hz - 20 KHz ± 0.1dB
• Maximum Output Level + 24dBm
• THD at Max Output 0.2% 30 Hz - 20KHz
• Insertion Loss 0.75dB @ 1 KHz (600 Ohm source & load)
• Input Connectors 3 pin female XLR wired Pin 2 + Hot, Pin 3 – Cold

Output Connectors

• 3 pin male XLR wired Pin 2 + Hot, Pin 3 – Cold.
• Audio grounds are unconnected
• Ground Reference Chassis is grounded to Output Pin 1; Duo version chassis is grounded to Channel 1, Output Pin 1

Construction
All-steel powder coated chassis, fiberglass PCB, ultra low noise audio transformer

• Input Impedance 300 Ohms
• Output Impedance 2 secondaries @ 600 Ohms each
• Frequency Response 20Hz - 20 KHz ± 0.1dB
• Maximum Output Level + 20dBm
• THD at Max Output 0.2% 30 Hz - 20KHz @ 20dBm
• Insertion Loss 1.6dB @ 1 KHz (600 Ohm source & load)
• Input Connectors 3 pin female XLR wired Pin 2 + Hot, Pin 3 – Cold

Output Connectors

• 3 pin male XLR wired Pin 2 + Hot, Pin 3 – Cold.
• Audio grounds are unconnected
• Ground Reference Chassis is grounded to Output A Pin 1; Duo version chassis is grounded to Channel 1, Output A
• Pin 1

Construction
All-steel powder coated chassis, fiberglass PCB, ultra low noise audio transformer

• Input Impedance 600 Ohms Balanced
• Max Input Level +20 dB
• THD Max 0.2% 30Hz to 20 KHz
• Frequency Response 20 - 20 KHz ± 0.5 dB
• Insertion Loss < 6dB @ 1 KHz (600 Ohm source/load)
• Power Requirements None
• Input Connectors 2 x Female XLR, Wired Pin 1 Not Connected,
• Pin 2 + Hot, Pin 3 – Cold.

Output Connectors

• Male XLR, Wired Pin 1 Chassis Ground, Pin 2 + Hot, Pin 3 – Cold.

Construction
All-steel powder coated chassis, fiberglass PCB, ultra low noise audio transformers

Please Note: When combining Unbalanced Inputs, Pins 1 and 3 should be bridged and the Ground wired to Pin 3.

• Frequency Response DC to Daylight ± 0.0dB
• Power Requirements None
• Input Connectors Female XLR, Wired Pin 1 Audio Ground, Pin 2 + Hot,
• Pin 3 – Cold.

Output Connectors

• Male XLR, Wired Pin 1 Audio Ground, Pin 2 + Hot,
• Pin 3 – Cold

Construction
All-steel powder coated chassis, fiberglass PCB

• Input Impedance 10K Ohms Unbalanced
• Output Impedance 10K Ohms Balanced
• Input Level (max) +12dB
• Frequency Response 20Hz - 20 KHz ± 0.5dB
• Distortion 0.2% Maximum THD, 0dB 1KHz
• Insertion Loss 0.75dB @ 1 KHz (600 Ohm load)
• Input Connector
• Stereo RCA connectors. RCA Ground connected to XLR Pin 1

Output Connector

• 3 pin male XLR, wired Pin 1 Ground, Pin 2 + Hot, Pin 3 - Cold.

Construction
All-steel powder coated chassis, fiberglass PCB

• Input Impedance 10K Ohms Balanced
• Output Impedance 10K Ohms Unbalanced
• Input Level (max) +12dB
• Frequency Response 20Hz - 20 KHz ± 0.5dB
• THD at Max Output 0.2% 30 Hz - 20KHz
• Insertion Loss 0.75dB @ 1 KHz (600 Ohm source)
• Input Connector 3 pin female XLR, wired Pin 1 Ground, Pin 2 + Hot,
• Pin 3 - Cold. Chassis Ground connected to XLR Pin 1

Output Connectors

• Dual stereo RCA connectors

Construction
All-steel powder coated chassis, fiberglass PCB, ultra low noise audio transformer

• Input Impedance 47K Ohms unbalanced, on both RCA connectors and Mini Jack
• Max Input Level Line +8 dB with Pad switch Out, + 28dB with Pad switch In
• Gain through Unit 6dB, Pad switch Out.
• Output Noise -90 dB Unweighted, -97 dB 'A' weighted, inputs loaded
• Frequency Response 20 - 20 KHz ± 0.3 dB
• Power Requirements 48V Phantom power on XLR pins 2 and 3;
• 12-15V DC from external supply
• Input Connectors Left and Right RCA (phono) connectors,
• plus Tip-Ring-Sleeve Mini Jack

Output Connectors

• Dual 3 pin XLR wired Pin 1 Ground, Pin 2 + Hot, Pin 3 – Cold.

Construction
All-steel powder coated chassis, fiberglass PCB

• Inputs 44 K Ohms Balanced, 22 K Ohms Unbalanced
• Stereo Headphone Output 1 watt @ 8 ohms max.
• Frequency Response 20 Hz - 20 KHz ± .5dB
• Distortion Max .1% prior to clipping.
• Power Requirements 12-15V DC from external supply
• Input Connectors Insulated Left and Right jacks. Inserting 1/4" jack into Left Input only will mono all Outputs for added flexibility.
• Channel A Inputs will loop through to all outputs unless Input jacks are inserted into Channels 3 and 4

Output Connector

• Insulated Tip-Ring-Sleeve jack. Wired Tip - Left out, Ring - Right out, Sleeve - Ground / Earth

Construction
All-steel powder coated chassis, fiberglass PCB External 12-15 V DC power supply required for operation.

• Mic Input Impedance 2 K Ohms Balanced; XLR type Pin 1 Audio Ground, Pin 2 +, Pin 3-
• Phantom Power Voltage Switchable +48 V DC on XLR Pins 2 and 3
• Power Requirements 12-15V DC from external supply
• Input Gain +10 dB Minimum, variable to +60 dB Maximum
• Pad Switch -20 dB attenuation
• Overload Indicator Measured at all Gain points throughout the circuitry
• Output Noise -90 dB Unweighted, -97 dB 'A' weighted
• (Measured with Gain nominal 20 dB)
• Frequency Response 20 - 20 KHz ± 0.25 dB
• Distortion 100 Hz 0.0085%, 1 KHz 0.008%, 10 KHz 0.0083%
• (Measured with Mic Gain @ 20 dB)
• Input Connectors Balanced 3 pin Female XLR mic input,
• wired Pin 1 Ground, Pin 2 + Hot, Pin 3 –

Output Connector

• Insulated Tip Ring Sleeve balanced jack

Construction
All-steel powder coated chassis, fiberglass PCB

• Max Input Level +12 dB Phantom powered, +8 dB using
• 12 VDC Power Supply.
• Input Impedance 1 Meg Ohm
• Max Output Level (nominal)
• +12 dB 10K Ohm load using Phantom power
• +11 dB 600 Ohm load using 12 VDC Power Supply
• Output Impedance 680 Ohms Balanced
• Output Signal to Noise -100 dB unweighted, -104 dB A weighted
• Dynamic Range 112 dB 10K Ohm load using 12 VDC Power Supply
• Distortion @100 Hz 0.0025%, @1KHz 0.0026%, @10KHz 0.0033%
• Frequency Response 20Hz to 20KHz, ± 0.2 dB
• Gain through Unit 6dB (Normal input, Pad switch out)
• Power Requirements 48V Phantom power on XLR pins 2 and 3;
• 12-15V DC from external supply
• Pad Switch -20 dB attenuation

Speaker Input

• -40 dB attenuation, equivalent to 100:1 decrease in input level.
• -60 dB attenuation available when Pad switch also enabled
• Input Connectors Insulated jacks

Output Connector

• 3 pin XLR. Wired Pin 1 Ground, Pin 2 + Hot, Pin 3 - Cold.
• Audio Ground (Pin 1) lift switch fitted

Construction
All-steel powder coated chassis, fiberglass PCB

• Input Voltage Selection 3 pin IEC connector, 110/120 V
• or 220 / 240 VAC, 50-60 Hz, Voltage externally variable
• AC Fuse 500mA
• Output Voltage Fully Regulated 15V DC @ 2 amp maximum output.
• Short circuit protected, automatic reset.

Output Connectors

• 4 x + and – screw terminals

Construction
All-steel powder coated chassis, fiberglass PCB