A Tribute to a Great Vintage Microphone Preamp The Focusrite ISA One is based on the vintage ISA 110 module microphone preamplifier. It features the same circuitry and componentry as that legendary and celebrated unit, including the Lundahl L1538 transformer and bespoke zobel network. These were the preamps that made Focusrite a household name, and they have been lovingly recreated for this excellent-sounding pre. It is unquestionably a product reflecting many years of continued innovation.
The Nicest DI Box in the Room Live or in the studio, the ISA One works as a fantastic direct input box when you want to run a high-impedance, line level, unbalanced output signal to a low-impedance microphone-level balanced input. As a DI, it delivers a great, noise-free sound. The DI channel is independent from the mic pre, and utilizes its own dedicated gain control.
Exceptional for Dual-Signal Application Focusrite developed this innovative design to accommodate guitars or basses running via a DI while miking the amp cabinet simultaneously. The ISA One also serves well as a great single solution for musicians looking to run a direct guitar and vocals through the same preamplifier.
Versatile and Intuitive I/O The Focusrite ISA One preamp has a single XLR and TRS line input. There is a switch for Active or Passive impedance to allow different signal sources to be routed quickly. A single TRS jack output is provided for routing to other amps. There is also an independent XLR output on the rear. The headphone output has a dedicated volume control.
Extensive Features for Tonal Crafting The ISA One's variable impedance design allows you to switch between four different input impedance settings for more tonal variety. There is even an additional Insert Point where extra processors or FX can be introduced in between the preamp and the DI. Phase Reverse and a 75 Hz, 18 dB/octave high-pass filter round out the tonal shaping capabilities. The ISA One preamp also delivers phantom power.
A moving-coil VU meter with variable calibration gives you clear input metering for both channels. Helpfully, the meter calibrations utilize all the same reference points as Pro Tools, allowing your digital meters to sync perfectly to your analog meters.
Focusrite ISA One Analogue Microphone Preamp Features
- Variable impedance design with four switchable input impedance settings
- 1 x XLR and 1 x TRS instrument input
- 1 x TRS External ADC input
- 1 x TRS Return
- 1 x TRS Jack Send
- 1 x Balanced XLR Line Output
- 1 x XLR DI output
- 1 x TS Jack DI through
- 1 x headphone jack with independent volume
- 75 Hz high-pass filter
- Moving coil VU meter can be calibrated
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