The Focusrite ISA ONE Analog Preamp is a high quality preamplifier designed to record microphone, line-level or instrument sources. It delivers Focusrite's prestigious ISA transformer-based pre-amp in a rugged and portable chassis, at a groundbreaking price.
The Focusrite ISA ONE Analog Preamp features a rugged, portable all-metal enclosure, and combines the classic Focusrite microphone preamp with a flexible, independent DI channel and optional 192kHz precision A-D conversion. At the heart of the Focusrite ISA ONE 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 Focusrite 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.
Focusrite ISA ONE Analog Preamp Features
- Classic ISA mic preamp design featuring Lundahl LL1538 input transformer
- Flexible independent DI channel
- Switchable input impedance including classic ISA 110 setting
- Headphone output with volume control
- Dedicated insert point
- Optional stereo 192kHz A-D conversion card
Focusrite ISA ONE Analog Preamp 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 kOhm 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)
Focusrite ISA ONE Analog Preamp Includes
- Focusrite ISA ONE Analog Preamp
- IEC Power Cable
- User Guide
- 2 Year Warranty
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