Focusrite ISA 828

$3,379.00

Focusrite ISA 828

In stock

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SKU: AMS-ISA828

Description

 

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.

Product Specifications

Mic Inputs

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

Line Inputs

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

Instrument Inputs

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

Instrument Inputs

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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