ISA 828

Specifications

We always quote 'real world' performance figures (measured to the AES17 standard). Some companies choose to quote chipset performance, which is misleading, and here's why.

Mic Input Response

  • Gain range: 0dB to 60dB in 10dB steps
  • Input Impedance, variable: 600Ω, 1k4Ω, 2k4Ω, 6k8Ω
  • EIN (equivalent input noise): -126dB measured at 60dB of gain with 150 Ohm terminating impedance and 22Hz/22kHz bandpass filter
  • Noise at main output with gain at unity (0dB): -97dBu measured with a 22Hz/22kHz bandpass filter
  • Signal to noise ratio relative to max headroom (9dBu): 106dB
  • THD at medium gain (30dB): 0.0008% measured with a 1kHz -20dBu input signal and with a 22Hz/22kHz bandpass filter
  • Frequency response at minimum gain (0dB): -0.5dB down at 10Hz and –3dB down at 110kHz
  • Frequency response at maximum gain (60dB): –3dB down at 16Hz and –3dB down 85kHz
  • CMRR: 91.8dB (Channel 1, 1kHz, maxiumum gain)
  • Crosstalk Channel to Channel: with 10dB@1kHz input to chA, chB output =102dBrA. With 10dB@10kHz input to chA, chB output = 84dBrA

Line Input Response

  • Gain range: -20dB to +10dB in 10dB steps
  • Input Impedance: 10k? from 10Hz to 200kHz
  • Noise at main output with gain at unity (0dB): -96dBu measured with a 22Hz/22kHz bandpass filter
  • Signal to noise ratio relative to max headroom (24dBu): 120dB
  • Signal to noise ratio relative to 0dBFS(+22dBu): 118dB
  • THD at unity gain (0dB): 0.001% measured with a 0dBu input signal and with a 22Hz/22kHz bandpass filter
  • Frequency Response at unity gain (0dB): 0.3dB down at 10Hz and –3dB down at 122kHz

Instrument Input Response

  • Gain range: 10dB to 40dB continuously variable
  • Input Impedance: 1M? or 300k?
  • Noise at minimum gain (+10dB): -90dBu measured with a 22Hz/22kHz bandpass filter
  • Noise at maximum gain (+40dB): -62dBu measured with a 22Hz/22kHz bandpass filter
  • THD at minimum gain (+10dB): 0.002% measured with a 10dBu input signal and with a 22Hz/22kHz bandpass filter
  • Frequency Response at 10dB gain with -10dB input: 10Hz-200kHz +/- 0.6dB
  • Frequency Response at 40dB gain with -40dB input: -2.5dB down at 10Hz and 0dB at 200kHz

High Pass Filter

  • Roll off: 18dB per octave 3 pole filter
  • Fixed Frequency 75Hz measured at the 3dB down point

Weight

  • 8.84kg
  • 19.5Ibs

Dimensions

  • 484mm (W) x 85mm (H) x 305mm (D) (350mm depth with heat sink)
  • 19" (W) x 3.5" (H) x 12" (D) (13.8" depth with heat sink)