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The ISA-828 from Focusrite is an eight-channel microphone preamp, featuring original ISA transformer-based preamps with the signature high-end Focusrite sound.
The microphone input stage provides a variable impedance circuit comprising four input impedance settings. Maximum gain is a very healthy 80dB, for use with low output dynamic and ribbon microphones.
Channels one through four include DI inputs that feature high and low impedance options, delivering a comprehensive and accessible DI solution. An eight-channel optional analog to digital converter card makes the ISA-828 the perfect front-end for a DAW.
Eight channel microphone preamp featuring original ISA transformer-based preamps
Each channel can accept either microphone or line input
Channels 1 - 4 also accept instrument inputs for guitars and basses, or vintage synthesizers with high impedance outputs
Microphone input can deliver up to 80dB of gain, particularly useful when working with very low output dynamic and ribbon microphones
Phantom power and phase switches provided on each input
High-pass filter on each channel provides a 75Hz knee frequency with 18dB/octave roll-off
Variable microphone impedance with four settings of 600, 1.4k, 24k and 6.8kΩ
Six-LED input meter per channel
Optional eight-channel 192kHz analog-to-digital converter card provides eight channels A/D conversion, delivering a dynamic range of 122dB and jitter at <250 picoseconds
In the Box
Focusrite ISA-828 - Microphone Preamp
AC Power Cable
One (1) Year Warranty
Table of Contents
Number of Channels
8 x XLR 8 x 1/4" TRS phone Line 4 x 1/4" TS phone Instrument
1 x 25-pin D-sub (8 x analog outputs)
48V, individually selectable
Mic: 0dB to 60dB in 10dB steps (an additional 20dB is available via trim controls) Line: -20dB to +10dB in 10dB steps Instr: 10dB to 40dB continuously variable
Maximum Output Level
Mic: 10Hz to 110kHz, -0.3dB/-3dB Line: 10Hz to 122kHz, -0.3dB/-3dB 10Hz-200kHz +/-0.6dB
Mic SNR: 106dB Line SNR: 120dB
19 x 12 x 3.5" (482 x 305 x 88mm)
19.4 lbs (8.8 kg)
Provision for adding optional eight-channel analog to digital converter card with Wordclock I/O, and which also provides insert functionality on all eight-channels