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Everything in Music Since 1958
Everything in Music Since 1958

Focusrite ISA 428 MkII

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Original price $1,999.99 - Original price $1,999.99
Original price
$1,999.99
Default Title: $1,999.99
Current price $1,999.99
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Get Four Classic Mic Preamps With The Focusrite ISA 428 MkII

The Focusrite ISA 428 MkII incorporates four of their most renowned mic pres in a simple-to-operate 2U enclosure, placing all four mic preamps, instrument inputs and line ins at your fingertips. The original Focusrite mic pre was designed to suit the microphones of the time; today's model makes one small change, adding three additional input impedances to the classic ISA 110 setting, allowing you to match any microphone, old or new, and access a wide range of sounds, from the character and warmth of a vintage mic to the clear transparency of a modern design.

Each one of the mic preamps 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 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. An array of 6-segment LED meters show peak signal level for the four mic pres, in addition to the four direct inputs to the optional A-D card. Switchable rear-panel insert points allow the use of inline processors such as compression.


  • Classic ISA mic preamp design featuring Lundahl LL1538 input transformer
  • Instrument and line inputs with dedicated input connectors and front-panel switch
  • Switchable input impedance including classic ISA 110 setting
  • Variable cut-off frequency high-pass filter
  • Dedicated analogue insert points
  • Per-channel six-segment LED peak-level meters
  • Brainworx bx_console - A Focusrite-exclusive plug-in that faithfully captures the sound, feel and styling of the original Focusrite ISA 110 Equaliser and ISA 130 Dynamics Modules
  • Optional A-D card with up to 192kHz, 24-bit sampling via ADAT or AES3


SPECIFICATIONS

Mic Inputs

  • Frequency response at minimum gain (0dB): -0.35dB at 20Hz and –3dB at 122kHz
  • Frequency response at maximum gain (60dB): –2.5dB at 20Hz and –3dB 103kHz
  • Gain range: 0dB to +60dB in 10dB steps, plus 0dB to +20dB continuously variable trim
  • Maximum headroom: +7.4dBu
  • Noise EIN: -126dB (measured at 60dB of gain with 150Ω termination and 20Hz/22kHz bandpass filter)
  • Noise at main output with unity gain: -98dBu (measured with a 20Hz/22kHz bandpass filter)
  • SNR: 123dB (relative to max output 25dBu)
  • CMRR: 88dB.
  • Input Impedance, variable: 600Ω, 1400Ω, 2400Ω, 6800Ω

Line Inputs

  • Frequency Response at unity gain (0dB): -0.3dB at 20Hz and –3dB at 94kHz
  • Gain range: -20dB to +10dB in 10dB steps, plus 0dB to +20dB continuously variable trim
  • Maximum Headroom: +25.4dBu
  • THD+N: 0.002% (measured with +4dBu input signal, 0dB gain setting, with a 20Hz/22kHz bandpass filter)
  • Noise at main output with unity gain: -91dBu (measured with a 20Hz/22kHz bandpass filter)
  • SNR: 116dB (relative to max output 25dBu); SNR: 113dB (relative to 0dBFS +22dBu). Input Impedance: 10kΩ

Instrument Inputs

  • Gain range: +10dB to +40dB continuously variable
  • Maximum headroom: +11.5dBu
  • Noise at main output with minimum gain (+10dB): -95dBu (measured with a 20Hz/22kHz bandpass filter)
  • Input Impedance = >1MO
  • High Pass Filter
  • Roll off = 18dB per octave 3 pole filter
  • Frequency range: 16Hz to 420Hz (continuously variable, measured at the 3dB down point)
  • Analogue Audio Outputs (Outputs 1-4)
  • 4 line XLR outputs on rear panel
  • 4 insert send 1⁄4" TRS jacks on rear panel
  • Other I/O
  • IEC power input connector 100Vac – 240Vac

Weight and Dimensions

  • Weight: 5.5kg (12.2lbs)
  • Dimensions: 480mm(W) x 88mm(H) x 280mm(D)


Manufacturer: Focusrite
Model: ISA428MK2
SKU: I344325-N-0-WHXA
UPC: 815301005124


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