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Focusrite Pro ISA 828 8-Channel Microphone Preamplifier

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Focusrite Pro ISA 828 8-Channel Microphone Preamplifier
Product no: TS-ISA828

Product information

General

The Focusrite Pro ISA 828 microphone preamplifier hosts eight Focusrite Pro ISA 110 mic preamps in one, and is great for studio and stage use! More specifically, it features eight balanced inputs (equipped with phantom power), six LED VU meters, a 25-pin D connector for ProTools, switchable impedance per channel, inserts on all eight channels, a high-pass filter and phase reversal. 

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Bax Music Warranty This product comes with a 3-year warranty.

Specifications

Product features

19-inch rack size
2U
Number of channels
8
Digital output
Yes
Energy source
AC
Phantom power
Yes
Phase reverse
Yes
Headphone output
No
Built-in compressor
No
Built-in equaliser
No
Built-in limiter
No
Connection sockets
None
Analogue audio input type
Balanced line in (TRS jack), balanced line in (DB25), microphone input (XLR), Hi-Z instrument input (TS jack)
Analogue audio output type
Balanced line out (DB25)
Equipped with tube
No

Weight and dimensions including packaging

Weight
9,0 kg
Dimensions
65,0 x 51,0 x 22,0 cm

Product specifications

  • mic input response 
  • gain range: 0 dB to 60 dB in 10dB steps 
  • EIN (similar input noise): -126 dB measured at 60 dB with a gain of 150 ohms ending impedance and a 22Hz/22kHz bandpass filter
  • noise at head output with a single gain of (0 dB): -97 dBu measured with a 22Hz/22kHz bandpass filter
  • signal/noise ratio in perspective with a maximum headroom (9 dBu): 106 dB 
  • THD at minimum gain (30 dB): 0.0008% measured with a 1 kHz-20dBu input signal and a 22Hz/22kHz bandpass filter
  • frequency response at min. gain (0 dB): -0.5 dB under 10 Hz and -3 dB under 110 kHz 
  • frequency response at max. gain (60 dB) -3 dB under 16 Hz and -3 dB under 85 kHz 
  • CMRR: 91.8dB (channel 1, 1 kHz, maximum gain)
  • crosstalk channel to channel: with 10 dB at 1 kHz input signal to chA, chB output = 102 dBrA. with 10 dB at 10 kHz input signal to chA, chB output = 84 dBrA
  • line input response 
  • gain range: -20 dB to +10 dB in 10 dB steps 
  • input impedance: 0 k input from 10 Hz to 200 kHz 
  • noise at head output with a single gain of (0 dB): -96 dBu measured with a 22Hz/22kHz bandpass filter
  • signal/noise ratio in perspective with a maximum headroom (24 dBu): 120 dB 
  • signal/noise ratio in perspective with 0 dBFS (+22 dBu): 118 dB
  • THS at minimum gain (0 dB): 0.001% measures with a 0 dBu input signal and with a 22Hz/22kHz bandpass filter
  • instrument input response 
  • gain reach: 10 dB to 40 dB constant variable
  • input impedance: 1 M or 300 k
  • noise at minimum gain (+10 dB): -90 dBu with a 22Hz/22kHz bandpass filter
  • noise at maximum gain (+40 db)-62 dBu with a 22Hz/22kHz bandpass filter
  • THS at minimum gain (+10 dB): 0.002% with a 10dBu input signal and with a 22Hz/22kHz bandpass filter 
  • frequency response at 10 dB gain with -10 dB input: 10 Hz - 200 kHz +/- 0.6 dB
  • frequency response at 40 dB gain with -40dB input: -2.5 dB down at 10 Hz and 0 dB at 200 kHz
  • high-pass filter
  • roll off: 18 dB per octave 3-pole filter
  • fixed frequency: 75 Hz at 3 dB (lowest point) 
  • weight: 8.84 kg
  • dimensions: 484 x 85 x 305 mm (W x H x D)

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