Portable Preamp Based on Focusrite Forte Technology
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AMS-ISA-ONE
ADK-FRT-1366-00113
Focusrite
Mac & Win
Availability: In stock
$599.99

Classic Mic Pre With Independent DI

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. TheDI 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.

·       Classic ISA mic preamp design featuring LundahlLL1538 input transformer

·       Flexible independent DI channel

·       Switchable input impedance including classic ISA110 setting

·       Headphone output with volume control

·       Dedicated insert point

·       Optional stereo 192kHz A-D conversion card

·       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.

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 terminatingimpedance and 22Hz/22kHz band-pass filter

 

Noise (Mic)

 

Noise at output with unity gain (0 dB) and 22 Hz-22 kHz bandpass 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 at125kHz

 

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. With10dB@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 bandpass filter0.0001

 

Frequency Response (Line)

 

At unity gain (0 dB)-0.3dB down at 10Hz and -3dB down at200kHz

 

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)

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