Focusrite ISA Two Focusrite ISA Two Classic Dual Mono Transformer-Based Microphone Preamplifier, Blue and Gray

Classic Duo Mono Transformer-Based Mic Preamp

You may only need a couple of mic preamps, but they need to be the very best. The ISA Two dual-mono mic pre is the ideal solution: two independent channels of the highest quality classic Focusrite mic pres, with line in and front-panel instrument inputs – no DI box required. Based on the legendary designs found in the Focusrite Forte and Studio Consoles, ISA Two is the ideal front-end for your rack.

Superb Sound Spanning Four Decades

Focusrite’s microphone preamplifiers go back to the original Focusrite ISA 110 modules, when Rupert Neve was commissioned by George Martin in 1985 to create a no-compromise channel strip for his Neve console. The Focusrite preamp is renowned for its transparency, but there's also that subtle warmth that transformer core saturation contributes. This seeming contradiction of warmth plus beautifully open, unrestricted high frequencies, is a classic hallmark of the mid '80s Focusrite designs. Combining the very best solid-state electronics with transformer coupling, Focusrite mic pres have played a key part in the recording of hundreds of hit records and they’re the choice of leading artists, producers, and engineers around the world.

Lundahl LL1538 Mic Input Transformer

At the heart of the ISA Two is a pair of Lundahl LL1538 transformers. ISA products have relied on Lundahl from the beginning, since their components were originally specified in 1985. The LL1538 features a three-section winding, resulting in very low leakage inductance and, as a result, an extended frequency response. They’re encapsulated in mu-metal cans to shield them from stray magnetism. To this day the Lundahl transformer remains the best microphone input transformer available, and is used in every ISA Series mic pre.

Up To 80 dB Of Gain

ISA Two features two classic Focusrite mic preamps, with four impedance settings including the original ISA 110 setting. Variable input impedance allows you to go for an accurate, transparent sound or choose to highlight the character of your favorite vintage mic – and anywhere in between. With up to 80 dB of low-noise gain, ISA Two can perform in the most demanding situations - really bringing your ribbon, condenser, or moving coil mics to life.

Variable Input Impedance

Four choices of input impedance, including the original ISA 110 value, allow you to match the preamp to your microphone, giving you the best possible sound. The impedance is selected using a switch on the front panel, and the impedance choice is remembered even once the unit is switched off and back on.

User-Calibrated Metering

Each channel has an eight-LED array to clearly display the level of your two signals. You can line up your analog levels with your converters or DAW by using the calibration knob on the rear panel. You will be safe in the knowledge that you have avoided clipping on the way in.

Insert Your Choice Of Processors

Each channel has a fully balanced insert point accessed via TRS sockets on the rear panel and activated with a front-panel button, so it’s easy to use outboard processors with the ISA Two. Just plug in your choice of EQ, compressor, or limiter. The 2.25-inch jack sockets on the front panel of ISA Two give you instant access to a transparent DI input. TRS line inputs are available on the rear panel too, and you can step through them instantly to select the one you want. Each channel of ISA Two has its own balanced insert point.

Variable Cut-Off High-pass Filter

Built in, and easily accessed with its own large knob and illuminated button, is an extremely smooth-sounding 18 dB/octave high-pass filter of the same design as the original ISA 110 module. This is ideal for cutting out unwanted low-frequency sounds, and with a range of 16 to 420 Hz, it's easy to lose what you don’t want, and keep what you do.