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    • Focusrite ISA Two Pair of ISA Microphone Preamps
    • Focusrite ISA Two Pair of ISA Microphone Preamps
    • Focusrite ISA Two Pair of ISA Microphone Preamps
  1. Focusrite ISA Two Pair of ISA Microphone Preamps

    Retail Price: R28,625.00
    Your Price: R22,995.00
    Save: R5,630.00
    From R2,178.00 x 12 months
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The ISA Story goes back to 1985, when Sir George Martin commissioned legendary designer Rupert Neve to design new modules for the console at AIR Montserrat. They were so successful that more were commissioned for AIR London. These original modules form the basis of todays Focusrite ISA range delivering the legendary Focusrite sound to leading studios, artists, producers and engineers around the world. Literally hundreds of hits have been made with the Focusrite ISA Range and continue to be made today.
Two legendary mic pres
Focusrites ISA Two brings together a totally independent pair of legendary ISA microphone preamps from the original ISA 110 module, combining the best of traditional solid-state electronics with the original input transformer specified by Rupert Neve the Lundahl LL1538. Two is a nice round number ideal for recording, say, a vocal and an instrument, or a stereo piano. But though you may only need two mic pres, you owe it to your craft to choose the best. (And if you need more, we offer ISA 428 Mk II 4-channel and ISA 828 8-channel units too.)
Variable input impedance
We've made one little adjustment to the mic pre. The original ISA 110 had a single input impedance that was ideal for the mics of the time. We've added three more, allowing you to get the very best out of any microphone, vintage or modern. Give a vintage mic the input it expects to get a traditional, warm sound. Pair the ISA Two with modern microphones and get the most transparent sound imaginable. Or experiment and pull out the inner character of any microphone you care to try. Couple that with up to 80dB of gain and you can be ready for anything.
Front panel instrument inputs
In addition to the mic pres, there are front panel instrument inputs for instant access, along with rear-panel line ins. There's also a balanced insert point on the rear panel, actuated with a front-panel button so you can insert the EQ, dynamics or other processors you need. Add to that the user-calibrated 8-LED metering and variable cut-off high-pass filter and you know that with the ISA Two you'll have everything you need to get the highest quality sound into your recordings.
Front panel, per channel
1/4' instrument input
Variable input impedance - Low, ISA 110, Medium, High
Input selection - Mic, Line, Instrument
0 - 30 dB/30 - 60 dB gain switch
Phantom power switch
Phase invert switch
0 - 60 dB gain in 10 dB steps
0 - +20 dB continuously variable trim
Variable high-pass filter with on/off switch
Insert point on/off switch
Eight-LED user-calibrated level meters
Single power switch
Rear panel, per channel
XLR-F mic inputs
1/4' TRS line inputs
1/4' TRS Sends
1/4' TRS Returns
XLR-M line output
Single peak meter calibration dial
Single IEC power socket
Maximum Input and Output Levels
Maximum Output Level
+24 dBu with a THD+N < 0.01% at 1kHz measured with 150 Ohm source impedance and 22Hz/22kHz band-pass filter
Maximum Microphone Transformer Input Level
+7 dBu with a THD+N < 0.7% at 1kHz measured at 0 dB of gain with 150 Ohm source impedance and 22Hz/22kHz band-pass filter
Mic Input Response
Gain range
0 dB to +60 dB in 10 dB steps, plus 0 dB to +20 dB continuously variable trim
Input Impedance
Switched Impedance setting
Equivalent Input Impedance at 1 kHz
Low = 600 Ohm
ISA 110 = 1.4 kOhm
Med = 2.4 kOhm
High = 6.8 kOhm
EIN (Equivalent Input Noise)
Measured at 60 dB of gain with 150 Ohm source impedance and 22 Hz-22 kHz band pass filter
-127 dB
Noise
Noise at output with unity gain (0 dB) and 22 Hz-22 kHz band pass filter
-97 dBu
Signal-to-Noise Ratio
Measured with 150 Ohm source impedance and 22 Hz-22 kHz band pass filter
121 dB relative to max output +24 dBu
Total Harmonic Distortion + Noise
Measured with a -20 dBu input signal at +30 dB of gain and with a 22 Hz-22 kHz band pass filter
< 0.0007% at 1 kHz
Frequency Response
At minimum gain (0 dB)
-0.5 dB at 10 Hz, -1 dB at 135 kHz, relative to 1 kHz
At +60 dB gain
-6 dB at 10 Hz, -1 dB at 115 kHz, relative to 1 kHz
CMRR (Common Mode Rejection Ratio)
-94 dB for mic input at 60 Hz for max. output = +24 dBu
-91 dB for mic input at 10 kHz for max. output = +24 dBu
Crosstalk Channel to Channel
Mic input, with I/P = 0 dBu, gain = 0 dB @ 1 kHz input to channel A, channel B output = -85 dB
Line Input Response
Gain range
-20 dB to +10 dB in 10 dB steps, plus 0 dB to +20 dB continuously variable trim
Input Impedance
10 kOhm from 10 Hz to 200 kHz
Noise
Noise at main output with gain at unity (0 dB) measured with 50 Ohm source impedance and a 22Hz - 22 kHz band pass filter
-97 dBu
Signal-to-Noise Ratio
Measured with 50 Ohm source impedance and a 22 Hz-22 kHz band pass filter
121 dB relative to max output +24 dBu
Total Harmonic Distortion + Noise
Measured with a 0 dBu input signal, +10 dB of gain and a 22 Hz-22 kHz band pass filter
< 0.0002% at 1 kHz
Frequency Response
At minimum gain (0 dB)
-0.3 dB at 10 Hz, -1 dB at 80 kHz, relative to 1 kHz
Crosstalk Channel to Channel
Line input, with I/P = 0 dBu, gain = 0dB @ 1 kHz input to channel A
Channel B output = -91 dB
Instrument Input Response
Gain range
+10 dB to +40 dB continuously variable trim
Input Impedance
2 MOhm
Noise
Measured with 22 Hz-22 kHz band pass filter
Minimum gain (+10 dB) = -95 dBu
Frequency Response
At minimum gain (+10 dB)
-0.1 dB at 10 Hz, -1 dB at 115 kHz, relative to 1 kHz
At maximum gain (+40 dB)
-2.5 dB at 10 Hz, -1 dB at 110 kHz, relative to 1 kHz
High-Pass Filter
Roll-Off
18 dB per octave (3 pole filter)
Frequency Range
Continuously variable from 16 Hz to 420 Hz (-3 dB)
Weight and Dimensions
W x D x H
480 mm x 280 mm x 44 mm
Weight
3.7 kg

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