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Focusrite ISA 428 MkII Preamps
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Focusrite ISA 428 MkII

2.259,00 €
2.139,00 € -5%
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Four Classic Mic Pres

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Focusrite ISA 428 MkII

 

 
 
 

ISA 428 MkII incorporates four of Focusrite's renowned mic pres in a simple-to-operate 2U enclosure, placing 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 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 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 switchable insert point
  • Per-channel six-segment LED peak-level meters
  • Optional A-D card with up to 192kHz, 24-bit sampling via ADAT or AES3
  • Brainworx bx_console Focusrite – exclusive plug-in that faithfully captures the sound, feel and styling of the original Focusrite ISA 110 Equaliser and ISA 130 Dynamics Modules.

MIC INPUTS

  • Frequency Response At Minimum Gain (0dB) (Mic) -0.35dB at 20Hz and –3dB at 122kHz
  • Frequency Response At Maximum Gain (60dB) (Mic)  –2.5dB at 20Hz and –3dB 103kHz
  • Gain Range (Mic) 0dB to 60dB in 10dB steps, plus 0dB to 20dB continuously variable trim
  • Maximum Headroom (Mic) 7.4dBu
  • Noise EIN (Mic) -126dB (measured at 60dB of gain with 150O termination and 20Hz/22kHz bandpass filter)
  • Noise At Main Output With Unity Gain (Mic)  -98dBu (measured with a 20Hz/22kHz bandpass filter)
  • SNR (Mic) 123dB (relative to max output 25dBu) 120dB (relative to 0dBFS ( 22dBu)
  • CMRR (Mic) 88dB
  • Input Impedance, Variable (Mic) 600O, 1400O, 2400O, 6800O

LINE INPUTS

  • Frequency Response At Unity Gain (0dB) (Line) -0.3dB at 20Hz and –3dB at 94kHz
  • Gain Range (Line) -20dB to 10dB in 10dB steps, plus 0dB to 20dB continuously variable trim
  • Maximum Headroom (Line) 25.4dBu
  • THD N (Line) 0.002 (measured with 4dBu input signal, 0dB gain setting, with a 20Hz/22kHz bandpass filter)
  • Noise At Main Output With Unity Gain (Line) -91dBu (measured with a 20Hz/22kHz bandpass filter)
  • SNR (Line) 116dB (relative to max output 25dBu) 113dB (relative to 0dBFS 22dBu). Input Impedance: 10kO
  • Frequency Response At 10dB Gain (Instrument) -0.2dB at 20Hz and 0dB at 200kHz
  • Frequency Response At 40dB Gain (Instrument) -3dB at 20Hz and –3dB at 38.4kHz

INSTRUMENT INPUTS

  • Gain Range (Instrument)
  • 10dB to 40dB continuously variable
  • Maximum Headroom (Instrument) 11.5dBu
  • Noise At Main Output With Minimum Gain ( 10dB) (Instrument) -95dBu (measured with a 20Hz/22kHz bandpass filter)
  • Input Impedance (Instrument) >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)

FRONT AND REAR CONNECTIVITY

  • 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)

GFO02000181

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