ISA One
The ISA Range from Focusrite, based on Rupert Neves original designs for Sir George Martins AIR Studios back in 1985, puts the renowned Heritage Sound of Focusrite into your own studio or live performance. Featuring a rugged, portable all metal enclosure, the ISA One combines the classic Focusrite transformer input microphone preamp with a flexible, independent DI channel and optional 192kHz precision A/D conversion.
SPECIFICATIONS
MIC INPUT RESPONSE
Gain Range (Mic)
0dB to 60dB in 10dB steps 20 dB of variable gain
EIN (Mic)
-126dB measured at 60dB of gain with 150 Ohm terminating impedance and 22Hz/22kHz band-pass filter
Noise (Mic)
Noise at output with unity gain (0 dB) and 22 Hz-22 kHz band pass filter-97 dBu
Signal-To-Noise Ratio (Mic)
106 dB relative to max headroom (9dBu)
Frequency Response (Mic)
At minimum gain (0 dB)-0.5dB down at 10Hz and -3dB down at 125kHz
CMRR (Mic)
98dB (Channel 1, 1kHz, maximum gain with 24 dBu input)
Crosstalk Channel To Channel (Mic)
With 10dB@1kHz input to chA, chB output =104dBrA. With 10dB@10kHz input to chA, chB output = 84dBrA
LINE INPUT RESPONSE
Gain Range (Line)
-20dB to 10dB in 10dB steps 20 dB of variable gain
Input Impedance (Line)
10 kO from 10 Hz to 200 kHz
Total Harmonic Distortion Noise (Line)
Measured with a 0 dBu input signal, and a 22 Hz-22 kHz band pass filter0.0001
Frequency Response (Line)
At unity gain (0 dB)-0.3dB down at 10Hz and -3dB down at 200kHz
INSTRUMENT INPUT RESPONSE
Gain Range (Instrument)
10dB to 40dB continuously variable
Input Impedance (Instrument)
High = greater than 1M Low =greater than 300k
THD (Instrument)
At minimum gain ( 10)
HIGH-PASS FILTER
Roll-Off
18 dB per octave (3 pole filter)
Frequency
Fixed 75Hz measured at the 3dB down point
WEIGHT AND DIMENSIONS
W X D X H
220mm (W) x 104mm (H) x 254 - 290mm
Weight
3.9 kg (8.6 lbs)
