FOCUSRITE ISA ONE Classic Mic Pre With Independent DI
FOCUSRITE ISA ONE เครื่องเปลี่ยนแปลงสัญญาณไมค์ ISA ONE ปรีแอมป์ ไมค์ จากแบรนด์ FOCUSRITE
Featuring a rugged, portable all-metal enclosure, ISA One combines the classic Focusrite microphone preamp with a flexible, independent DI channel and optional 192kHz precision A-D conversion. At the heart of the ISA range is the microphone preamplifier with its Lundahl input transformer – essentially the same circuit, based on the original ISA 110, that has been used for 30 years in successive Focusrite designs. The input transformer imparts a special character to the sound that can’t be truly emulated in any other way, while the modern twist of variable input impedance allows for a new degree of flexibility.
Whether you’re an artist, engineer or producer, you’ll appreciate the versatility of the ISA One, with its front-panel DI input. The DI includes low/high impedance switching and an amplifier output, and its own feed to the optional A-D converter and separate rear-panel XLR output.
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Classic ISA mic preamp design featuring Lundahl LL1538 input transformer
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Flexible independent DI channel
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Switchable input impedance including classic ISA 110 setting
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Headphone output with volume control
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Dedicated insert point
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Optional stereo 192kHz A-D conversion card
MIC INPUT RESPONSE |
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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 [email protected] input to chA, chB output =104dBrA. With [email protected] input to chA, chB output = 84dBrA |
LINE INPUT RESPONSE |
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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 |
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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 |
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Roll-Off |
18 dB per octave (3 pole filter) |
Frequency |
Fixed 75Hz measured at the 3dB down point |
WEIGHT AND DIMENSIONS |
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W X D X H |
220mm (W) x 104mm (H) x 254 – 290mm |
Weight |
3.9 kg (8.6 lbs) |