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Table of Contents
Related Manuals for Focusrite ISA Two
Summary of Contents for Focusrite ISA Two
- Page 1 Two channel classic transformer mic pre User Guide focusrite.com FA0540-03...
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Page 2: Table Of Contents
................ISA TWO CONTROLS AND FEATURES . -
Page 3: About This User Guide
About this User Guide This user guide applies to the ISA Two mic pre. It provides information about installing and using the unit, and how it can be connected into your system. If you feel that additional information might be of assistance, be sure to consult the site: pro.focusrite.com/technical-support, which contains a comprehensive collection of common... -
Page 4: Isa Two Controls And Features
ISA TWO CONTROLS AND FEATURES Front Panel Instrument Power Channel 1 Channel 2 inputs meters switch Channel Controls Mic and Selects the high 10 dB stepped Mic/ Applies the Filter roll-off Instrument input (30-60 dB) mic Line Gain switch variable-frequency... -
Page 5: Line Input Gain
Channel Controls... +48V Pressing the +48V button applies phantom power to the Mic input XLR. This switch does not affect the Line or Instrument inputs. If you are unsure whether your microphone requires phantom power please refer to its handbook. Certain microphones (most notably ribbon and unbalanced mics) could be damaged by applying phantom power. -
Page 6: Meter Calibration
Channel Meters The LED meters indicate level at the channel output connectors. The scale is in dBFS, ie., the level in dB, relative to maximum output (reached when the ‘0’ LED illuminates). The default calibration is for ‘0’ to indicate a signal level of 22 dBu. Meter Calibration The level at which the ‘0’... -
Page 7: Rear Panel
Line input trim pot AC Mains Inlet Standard IEC receptacle for AC mains. ISA Two features a ‘Universal’ PSU, enabling it to operate on any supply voltage between 100 V and 240 V AC. Channel Mic Inputs On latching XLR-3 female connectors, with switchable phantom power per channel. -
Page 8: Physical Characteristics
31.8mm / 1.25” Case dimensions are illustrated in the diagram above. ISA Two requires 1U of vertical rack space. Allow an additional 75mm of rack depth behind the unit for cable access. ISA Two weighs 3.7 kg and for installations in a fixed environment (eg., a studio rack), the front- panel rack mountings* will provide adequate support. -
Page 9: Appendices
APPENDICES 1. Connector Pinouts Mic Input Signal Connector: XLR-3 female Screen Hot (+ve) Cold (–ve) Output Signal Connector: XLR-3 male Screen Hot (+ve) Cold (–ve) Line Input / Insert Send / Insert Return Signal Connector: Balanced (TRS) 1/4” Jack socket Hot (+ve) Ring Cold (–ve) -
Page 10: Preamp Input Impedance
– even from average-performance microphones. Various microphone/ISA Two preamp impedance combinations can be tried to achieve the desired amount of colouration for the instrument or voice being recorded. To understand how to use the impedance selection creatively, it may be useful to read the following section on how the microphone output impedance and the mic preamp input impedance interact. - Page 11 2. Pre Amp Impedance... To minimise microphone loading, and to maximise signal to noise ratio, preamps have traditionally been designed to have an input impedance about ten times greater than the average microphone, around 1.2 kΩ to 2 kΩ. (The original ISA 110 preamp design followed this convention and has an input impedance of 1.4 kΩ...
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Page 12: Pro Tools Interfacing
Appendices... 3. Pro Tools Interfacing • Analogue out to Pro Tools | HD ISA Two 2 x XLR-3 female – DB25 male analogue Red 16Line Pro Tools interface... -
Page 13: Performance And Specifications
PERFORMANCE AND SPECIFICATIONS Microphone Inputs All measurements taken at minimum gain, Z In: medium, unless otherwise stated. Measurements taken at the analogue outputs 0 to 30 dB, or 30 to 60 dB with ‘30-60’ switch enabled, in 10 dB steps, Gain Range plus 0 to 20 dB of continuous trim +7 dBu... - Page 14 Performance and Specifications . . . Output Level Maximum output level +24 dBu Connectivity Front panel Instrument inputs 2 x 1/4” mono jack Rear Panel Microphone inputs 2 x XLR-3 female Line level inputs 2 x 1/4” balanced jack Insert sends 2 x 1/4”...
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Page 15: Focusrite Pro Warranty And Service
You can contact our Customer Support team free of charge: Email: proaudiosupport@focusrite.com Phone (UK): +44 (0)1494 836384 Phone (USA): +1 (310) 450-8494 Troubleshooting If you are experiencing problems with your ISA Two, we recommend that in the first instance, you visit our Support Help Centre at: pro.focusrite.com/help-centre...