Focusrite ISA-2 Two Channel Classic Focusrite Mic Pres

SKU
ISA-2

$899.99

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Focusrite's ISA Two brings together a totally independent pair of classic 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. Each mic pre has the option of mic, line or the front-panel instrument input, with variable input impedance to ensure you are getting the best performance from the source. Up to 60dB of gain is available on the first four-position rotary and gain range switches, with a further +20dB of continuously variable trim, meaning a huge 80dB of gain is available should it be required. The high-pass filter features variable cut-off frequency between 16 and 420Hz. A pair of 8-segment LED meters show peak signal level in dBFS, while a rear-panel pot allows calibration to suit your A-D converters. Rear-panel insert points allow the use of inline processors such as compression.

The ISA Two provides two of Focusrite's prestigious transformer-based microphone preamps. It features the same classic circuitry and renowned audio quality found in the original at a new level of affordability. With selectable input impedance, direct instrument inputs and insert points, the ISA Two creates the perfect front end for the discerning recording professional. First introduced in 1985, the ISA microphone preamp holds a reputation for outstanding transparency along with subtle warmth contributed by transformer core saturation. The addition of a variable impedance circuit allows ISA users to perfectly match the preamp with any microphone, or to use different settings creatively to shape the sound of the microphone. Unchanged for decades, the ISA microphone preamp topology offers incredible clarity and the signature Focusrite sound that makes it the top choice among many audio professionals today.

Focusrite ISA-2 Mic Pres Features:

  • Classic ISA mic preamp design featuring Lundahl LL1538 input transformer.
  • Front-panel instrument inputs.
  • Dedicated TRS line input socket with front-panel switch.
  • Switchable input impedance including classic ISA 110 setting.
  • Dedicated insert points.
  • User-calibrated peak-level meters.
  • Two ISA series transformer-based preamps.
  • Two front panel instrument inputs.
  • Dedicated analogue insert points.
  • Variable high pass filter.

Focusrite ISA-2 Specifications:

Mic Input Response
Gain range (Mic): 0 dB to 60 dB in 10 dB steps, plus 0 dB to 20 dB continuously variable trim
EIN (Mic): Measured at 60 dB of gain with 150 O source impedance and 22 Hz-22 kHz band pass filter -127 dB
Noise (Mic): Noise at output with unity gain (0 dB) and 22 Hz-22 kHz band pass filter -97 dBu
Frequency Response (Mic): At minimum gain (0 dB)-0.5 dB at 10 Hz,?-1 dB at 135 kHz, relative to 1 kHz
At 60 dB gain (Mic): -6 dB at 10 Hz, -1 dB at 115 kHz, relative to 1 kHz
Crosstalk Channel to Channel (Mic): 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 (Line): -20 dB to 10 dB in 10 dB steps, plus 0 dB to 20 dB continuously variable trim
Input Impedance (Line): 10 kO from 10 Hz to 200 kHz
Frequency Response (Line): 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): 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 (Instrument): 10 dB to 40 dB continuously variable trim
Input Impedance (Instrument): 2 MO
Noise (Instrument): Measured with 22 Hz-22 kHz band pass filterMinimum gain ( 10 dB) = -95 dBu
Frequency Response (Instrument): 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) (Instrument): -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: 18.8" x 11" x 1.7" (480 mm x 280 mm x 44 mm)
Weight: 8.1 lbs. / 3.7 kg

Each ISA-2 Retail Box Includes:
(1) Focusrite ISA-2 Two Channel Classic Focusrite Mic Pres
(1) IEC Power cable
(1) Printed User Guide in English, French and German

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