The Focusrite ISA Two dual-mono rackmount mic pre is the ideal solution when only two inputs are needed but with superb quality sound: 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.And now you can add the iconic sound, feel, and styling of the legendary Focusrite console to your production toolkit simply by registering your ISA Two. The Bx_console Focusrite SC is a virtual channel strip from the original console featuring the ISA 110 EQ and ISA 130 dynamics module including the compressor/limiter, expander/gate, and de-esser. The plugin is an SC VST/AU/AAX compatible plug-in for Mac and PC, and yours for free upon registration, a $349 value!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. 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.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 3-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.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.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.FeaturesLundahl LL1538 mic input transformerUp to 80 dB of gainVariable input impedanceUser-calibrated meteringFront-panel instrument and rear panel line inputsVariable cut-off high-pass filterRear panel balanced insertsSpecificationsFront panel, per channel:1/4" instrument inputVariable input impedance - Low, ISA 110, Medium, HighInput selection - Mic, Line, Instrument0 - 30 dB/30 - 60 dB gain switchPhantom power switchPhase invert switch0 - 60 dB gain in 10 dB steps0 - +20 dB continuously variable trimVariable high-pass filter with on/off switchInsert point on/off switchEight-LED user-calibrated level metersSingle power switchRear panel, per channel:XLR-F mic inputs1/4" TRS line inputs1/4" TRS Sends1/4" TRS ReturnsXLR-M line outputSingle peak meter calibration dialSingle IEC power socketDimensions (WxDxH): 18.9" x 11" x 1.7" (480 x 280 x 44 mm)Weight 8.2 lbs (3.7 kg)Maximum Input and Output LevelsMaximum Output Level: +24dBu with a THD+N< 0.01% @ 1kHz measured with 150 Ω source impedance and 22Hz - 22kHz band-pass filterMaximum Microphone Transformer Input Level: +7dBu with a THD+N< 0.7% @ 1kHz measured @ 0dB of gain with 150Ω source impedance and 22Hz - 22kHz band-pass filterMic Input ResponseGain range: 0dB to +60dB in 10dB steps, plus 0dB to +20dB continuously variable trimInput Impedance: Switched Impedance setting;Equivalent Input Impedance at 1 kHzLow = 600 ΩISA 110 = 1.4 kΩMed = 2.4 kΩHigh = 6.8 kΩEIN (Equivalent Input Noise): Measured @ 60dB of gain with 150Ω source impedance and 22Hz-22kHz band pass filter; -127 dBNoise: Noise at output with unity gain (0dB) and 22Hz-22kHz band pass filter; -97dBuSignal-to-Noise Ratio: Measured with 150Ω source impedance and 22Hz-22kHz band pass filter; 121dB relative to max output +24dBuTotal Harmonic Distortion + Noise: Measured with a -20dBu input signal @ +30 B of gain and with a 22Hz-22kHz band pass filter< 0.0007% at 1 kHzFrequency Response:At minimum gain (0 dB-): 5dB @ 10Hz, -1dB @ 135kHz, relative to 1kHz@ +60 dB gain: -6 dB @ 10 Hz, -1 dB@ 115 kHz, relative to 1 kHzCMRR (Common Mode Rejection Ratio)-94 dB for mic input @ 60 Hz for max. output = +24 dBu-91 dB for mic input @ 10 kHz for max. output = +24 dBuCrosstalk(Channel to Channel): Mic input, with I/P = 0dBu, gain = 0dB @ 1kHz input to channel A, channel B output = -85dBLine Input ResponseGain range: -20dB to +10dB in 10dB steps, plus 0dB to +20dB continuously variable trimInput Impedance: 10kΩ from 10Hz to 200kHzNoise: Noise at main ... Focusrite