You can enjoy the benefits of Focusrite's classic heritage sound in many ways, but one of the most cost-effective is with the ISA 828, which includes eight Focusrite transformer-based mic preamps in a compact 2U package, along with front panel instrument ins and rear panel line inputs
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|Gain range||0 dB to 60 dB in 10 dB steps|
|Input Impedance||Variable, 600Ω, 1k4Ω, 2k4Ω, 6k8Ω|
|EIN (equivalent input noise)||-126 dB measured at 60 dB of gain with 150 Ohm terminating impedance and 22 Hz / 22 kHz bandpass filter|
|Noise at main output with gain at unity (0 dB)||-97 dBu measured with a 22 Hz / 22 kHz bandpass filter|
|Signal to noise ratio relative to max headroom (9dBu)||106 dB|
|THD at medium gain (30dB)||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)||-0.5 dB down at 10 Hz and –3 dB down at 110kHz|
|Frequency response at maximum gain (60 dB)||–3 dB down at 16 Hz and –3 dB down 85 kHz|
|CMRR||91.8 dB (Channel 1, 1 kHz, maxiumum gain)|
|Crosstalk Channel to Channel||With 10 dB @ 1 kHz input to chA, chB output = 102 dBrA. With 10 dB @ 10 kHz input to chA, chB output = 84 dBrA|
|Gain range||-20 dB to +10 dB in 10 dB steps|
|Input Impedance||10 kΩ from 10 Hz to 200 kHz|
|Noise at main output with gain at unity (0 dB)||-96 dBu measured with a 22 Hz / 22 kHz bandpass filter|
|Signal to noise ratio relative to max headroom (24 dBu)||120 dB|
|Signal to noise ratio relative to 0dBFS(+22dBu)||118dB|
|THD at unity gain (0dB)||0.001% measured with a 0 dBu input signal and with a 22 Hz / 22 kHz bandpass filter|
|Frequency Response at unity gain (0dB)||0.3 dB down at 10 Hz and –3 dB down at 122 kHz|
|Gain range||10 dB to 40 dB continuously variable|
|Input Impedance||1 MΩ or 300 kΩ|
|Noise at minimum gain (+10 dB)||-90 dBu measured with a 22 Hz / 22 kHz bandpass filter|
|Noise at maximum gain (+40 dB)||-62 dBu measured with a 22 Hz / 22 kHz bandpass filter|
|THD at minimum gain (+10 dB)||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||10 Hz - 200 kHz +/- 0.6 dB|
|Frequency Response at 40 dB gain with -40 dB input||-2.5 dB down at 10 Hz and 0 dB at 200 kHz|
|Roll off||18 dB per octave 3 pole filter|
|Frequency||Fixed 75Hz measured at the 3dB down point|
Weight and Dimensions
|Weight||8.84 kg||19.5 lbs|
|Dimensions (W x H x D)||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)|
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Included software – eStore:
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.
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.