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Focusrite ISA828

Eight classic microphone pre-amplifiers and class-leading A-D conversion

Brand New

Out of stock

$2,499.99
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Product Description for the Focusrite ISA828

ISA 828 incorporates eight 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.

Features

  • Classic ISA mic preamp design featuring Lundahl LL1538 input transformer
  • Front-panel instrument inputs to first four channels
  • Line inputs with dedicated input connectors and front-panel switch
  • Switchable input impedance including classic ISA 110 setting
  • High-pass filters
  • Switchable insert points when used with A-D card
  • Per-channel six-segment LED peak-level meters
  • Optional A-D card with up to 192kHz, 24-bit sampling via ADAT or AES3

Mic Inputs

  • Gain Range (Mic) : 0 dB to 60 dB in 10 dB steps
  • Input Impedance (Mic) : Variable, 600O, 1k4O, 2k4O, 6k8O
  • Noise At Main Output With Gain At Unity (0 DB) (Mic) : -97 dBu measured with a 22 Hz / 22 kHz bandpass filter
  • Signal To Noise Ratio Relative To Max Headroom (9dBu) (Mic) : 106 dB
  • THD At Medium Gain (30dB) (Mic) : 0.0008 measured with a 1 kHz -20 dBu input signal and with a 22 Hz / 22 kHz bandpass filter
  • Frequency Response At Minimum Gain (0 DB) (Mic) : -0.5 dB down at 10 Hz and –3 dB down at 110kHz
  • Frequency Response At Maximum Gain (60 DB) (Mic) : –3 dB down at 16 Hz and –3 dB down 85 kHz
  • CMRR (Mic) : 91.8 dB (Channel 1, 1 kHz, maxiumum gain)

Line Inputs

  • Input Impedance (Line) : 10 kO from 10 Hz to 200 kHz
  • Gain Range (Line) : -20 dB to 10 dB in 10 dB steps
  • Noise At Main Output With Gain At Unity (0 DB) (Line) : -96 dBu measured with a 22 Hz / 22 kHz bandpass filter
  • Signal To Noise Ratio Relative To Max (Line) : 120 dB
  • Signal To Noise Ratio Relative To 0dBFS( 22dBu) (Line) : 118dB
  • THD At Unity Gain (0dB) (Line) : 0.001 measured with a 0 dBu input signal and with a 22 Hz / 22 kHz bandpass filter
  • Frequency Response At Unity Gain (0dB) (Line) : 0.3 dB down at 10 Hz and –3 dB down at 122 kHz

Instrument Inputs

  • Gain Range (Instrument) : 10 dB to 40 dB continuously variable
  • Input Impedance (Instrument) : 1 MO or 300 kO
  • Noise At Minimum Gain ( 10 DB) (Instrument) : -90 dBu measured with a 22 Hz / 22 kHz bandpass filter
  • Noise At Maximum Gain ( 40 DB) (Instrument) : -62 dBu measured with a 22 Hz / 22 kHz bandpass filter
  • THD At Minimum Gain ( 10 DB) (Instrument)  : 0.002 measured with a 10 dBu input signal and with a 22 Hz / 22 kHz bandpass filter
  • Frequency Response At 10 DB Gain With -10 DB Input (Instrument) : 10 Hz - 200 kHz /- 0.6 dB
  • Frequency Response At 40 DB Gain With -40 DB Input (Instrument) : -2.5 dB down at 10 Hz and 0 dB at 200 kHz
  • Roll Off : 18 dB per octave 3 pole filter
  • Frequency (Instrument) : Fixed 75Hz measured at the 3dB down point
  • Dimensions (W X H X D) : 484mm (W) x 85mm (H) x 305mm (D) (350mm depth with heat sink)
SKU FOC-ISA828
Brand Focusrite
Weight 19.4000
Dimensions (WxHxD) 19" x 3.5" x 12"

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