Focusrite ISA Two
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Essential Information About the Focusrite ISA Two Mic Preamp
Essential Information About the Focusrite ISA Two Mic Preamp
- Two independent ISA channels for uncompromising stereo recordings (vocals, overheads, piano, strings, room, etc.).
- Lundahl LL1538 input transformers: wide bandwidth, clean transients, and the typical "silky" grain of the ISA series.
- Front panel instrument inputs and dedicated line inputs: direct connection without a DI box, ideal for both home studios and professional racks.
- Variable impedance + insert per channel: fine adjustment to microphones and easy integration of a compressor, EQ, or gate during tracking.
Manufacturer Information
Focusrite
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A Direct Heir to Focusrite's "ISA" Designs That Have Become Studio Standards
The Focusrite ISA Two follows the lineage of ISA preamps, themselves inspired by the designs found on the historic Forte console and studio consoles of that era. The goal remains the same: to offer a preamp with a musical character, featuring a large dynamic range and detailed reproduction, while maintaining modern rack ergonomics. Within the range, the ISA Two stands out with its "duo" approach: two high-end mono channels combined in a 1U format, designed for stereo recordings and sessions where coherence between two sources (or two microphones) is crucial.
A Dual Preamp Designed for Stereo Recording and Demanding Takes
If you only need a pair of mic preamps, the ISA Two clearly targets the top tier: capturing vocals with dual mics, stereo piano, overheads, AB/XY pairs, room mics, acoustic guitar, or recording synths and drum machines via its line inputs. The high-impedance front panel instrument inputs also facilitate direct recording of bass or guitar without an external DI, with appropriate level and impedance.
Each channel remains completely independent, allowing you to process two different sources with dedicated settings (gain, impedance, filter, phase inversion, insert), making the ISA Two equally relevant for "live" recording as well as production, when a clean, stable capture that's easy to integrate into a mix is desired.
Technical specifications
| Insert | Yes | Category | microphone preamp |
| Number of channels | 2 | Audio outputs | XLR |
| Phantom power supply | Yes | Impedance selector | Yes |
| EQ | High-pass filter | Vumeter | LED level indicator |
| Gain | 80 dB | Number of instrument inputs | 2 |
| Valve | No | Number of microphone inputs | 2 |
| Rack unit | 1 | Color | Blue |
| Compressor | No | Weight | 3.7 kg |
| Phase opposition | Yes | Dimensions (mm) | 480 x 280 x 44 |
| Remote | No | ||
Questions frequently asked
Focusrite ISA Two for stereo recordings: is it suitable?
Its two independent channels allow for stereo recording of piano, overheads, AB or XY pairs, and ambient microphones. Each channel has its own gain, impedance, filter, and phase controls.
What microphone impedance does the ISA Two offer?
Four values are selectable per channel: 600 ohms, 1.4 kohm, 2.4 kohm, and 6.8 kohm. This selection allows matching the input load to the microphone used.
Can a guitar or bass be connected directly?
Two high-impedance instrument inputs on the front panel enable direct recording of a guitar or bass without any external DI.
Is the high-pass filter adjustable?
Filtering covers a range from 16 Hz to 420 Hz via a dedicated potentiometer. A HPF switch is labeled with an 18 dB per octave slope at 75 Hz. It helps reduce vibrations, rumble, and microphone stand handling noise.
Can an external compressor be inserted on each channel?
Each channel includes an insert point to place a processor between the preamp or DI and the output. The audio outputs are in XLR format.



