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USB I/O Specifications
  • Input Connector USB type B port
  • Codec 24 bit, 44.1 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 XP, Vista or Windows 7
  • Apple Mac OS X or later
  • USB port
  • Audio software installed
98SE will need the Win 98SE CD Rom to install driver.

USB DI [USB-1] Specifications
  • 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.

USB DI VC [USB-2] Specifications
  • 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.

ISO Optimizer [OPT-1] Specifications
  • 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

ISO Later [IL-1/IL-2] Specifications
  • 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

ISO Splitter [IS-1/IS-2] Specifications
  • 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

ISO Combiner [ISO-C] Specifications
  • 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.

ISO Switcher [ISO-S] Specifications
  • 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

ISO Balancer [IB-1] Specifications
  • 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

ISO De-Balancer [IB-2] Specifications
  • 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

AV DI [AVDI] Specifications
  • 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

Ear Driver [ED-1] Specifications
  • 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.

DI-Pre [PRE-1] Specifications
  • 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

Pro-DI [PDI-1/PDI-2] Specifications
  • 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

AudiBox PSU [PSU] Specifications
  • 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