Focusrite ISA One Portable Desktop Microphone Preamp

The Focusrite ISA One is a single-channel microphone preamplifier that utilizes a transformer-based design, drawing inspiration from the original ISA 110 preamp, which was integral to each channel of the renowned Forte console. This device showcases a classic vintage architecture and is equipped with the Lundahl L1538 transformer along with a custom Zobel network.

In addition to its switchable input impedance options for the microphone preamp, the ISA One features a line input accessible via XLR and 1/4″ TRS phone jacks. Furthermore, it includes an independent DI channel that offers a dedicated gain control, an active or passive impedance switch, a 1/4″ TRS output for connecting to an amplifier, and a separate XLR output located at the rear.

The ISA One is equipped with an insert point, allowing for additional signal processing to be integrated between the preamp or DI and the optional analog-to-digital converter if necessary. The angled front panel also provides access to phantom power, phase reversal, and a 75 Hz, 18 dB/octave high-pass filter.

For independent input metering on both channels, a moving coil VU meter is included, featuring variable calibration to accommodate both analog and digital recording formats, in addition to two six-LED peak meters. Metering can be configured to occur either before or after the insert point. The calibration of the meters aligns with the reference points used in Avid’s Pro Tools HD systems, facilitating seamless integration with Pro Tools.

An exceptional addition is the Brainworx bx_console Focusrite SC channel-strip plug-in, which offers a remarkable digital emulation of the iconic and rare Focusrite Studio Console. With only ten of these consoles ever manufactured, users can now experience its renowned sound directly within their digital audio workstation.

• Classic single-channel Focusrite microphone preamp with Independent DI
• Ideal for both engineers and demanding performers alike, featuring independent gain control, an output for routing to an amp, an independent XLR output on the rear and routing to the optional ADC
• Four, carefully selected, switchable input-impedance levels (including the original ISA 110 setting), to match or enhance the performance of any microphone
• Headphone output with volume control can feed either a sum of the two inputs to the headphones output, or an external stereo cue mix (such as a stereo mix feed from an interface) via two TRS Jack inputs on the rear of the unit
• Optional stereo 192 kHz analog-to-digital conversion card utilizes cutting-edge conversion technology and Focusrite analog circuitry to deliver the highest A/D performance with a dynamic range of 119 dB
• Dedicated insert point allows the user to place extra processing such as an EQ or compressor, between the preamplifier or DI and the optional converter
• Includes Brainworx bx_console Focusrite SC channel-strip plug-in, a stellar digital emulation of the legendary and rare Focusrite Studio Console