Focusrite ISA Two Dual Channel Classic ISA Mic Preamp/DI

Description The ISA Two from Focusrite is a dual mono microphone preamp featuring transformer based microphone inputs with variable input impedance. Based on the legendary designs found in the Focusrite Forte and Studio consoles, the preamps provides up to 80 dB of gain, while two front panel instrument inputs allow for immediate access to two transparent DIs.The microphone inputs feature a pair of Lundahl LL1538 transformers with a 3-section winding that results in very low leakage inductance, along with an extended frequency response. To shield them from stray magnetism, each is encapsulated in mu-metal cans. Each channel has a fully-balanced insert point, activated using a front-panel button, making it easy to insert a choice of outboard EQ, a compressor, or limiter.A premium bonus is the Brainworx bx_console Focusrite SC channel-strip plug-in, a stellar digital emulation of the legendary and rare Focusrite Studio Console. Only 10 of the consoles were ever produced, but you can access its famed sound directly in your DAW. FeaturesMicrophone Input TransformerIncludes Lundahl LL1538 input transformers, originally chosen by Rupert Neve for the ISA 110 and one of the best microphone input transformers availableZobel network in the ISA circuit (perfected by Rupert Neve) allows the microphone preamp to maintain an extremely flat frequency response across a very wide bandwidthGainOffers up to 80 dB of clean, distortion-free gainISA topology ensures low-noise even at the highest gain levelsThe transformer supplies 20 dB of gain, while the ISA’s input stage offers up to 60 dB of additional gain on the microphone inputVariable Input ImpedanceFour choices of input impedance, including the original ISA 110 value, allow for matching the preamp to a different microphones, even a vintage type, for the best possible soundImpedance is selected using a switch on the front panelImpedance choice is remembered even when the unit is switched off and back onUser-Calibrated MeteringEach channel has an eight-LED array to clearly display the level of the two signalsLine up the analog levels with digital converters or a DAW by using the calibration knob on the rear panelCalibration avoids clipping on inputInstrument and Line InputsTwo 1/4″ TS connectors on the front panel provide access to a transparent DI inputTRS line inputs are available on the rear panel and a front panel switch allows for stepping through them to instantly select required inputVariable High-Pass FilterSmooth-sounding, built-in 18 dB/octave high-pass filter per channelSame design as the original ISA 110 moduleIdeal for cutting out rumble, thumps and other unwanted low-frequency sounds using the 16 Hz to 420 Hz rangeEasily accessed with a large knob and illuminated buttonBalanced InsertsEach channel has its own balanced insert point via 1/4″ TRS send and receive connectorsAllows for a choice of signal processor to be connected and switched in and out using the illuminated switch on the front panelFocusrite Console Plug-InIncludes Brainworx bx_console Focusrite SC channel-strip plug-in, a stellar digital emulation of the legendary and rare Focusrite Studio Console   SpecificationsNumber of Channels2Multi FunctionNoInputs2 x 1/4″ TS phone Instrument (front panel)2 x XLR Microphone (rear panel)2 x 1/4″ TRS phone Line (rear panel)2 x 1/4″ TRS phone Return (rear panel)Input ImpedanceMic (@ 1 kHz): Low = 600Ω, ISA 110 = 1.4Ω, Medium = 2.4Ω, High = 6.8 kΩLine: 10 kΩ from 10 Hz to 200 kHzInstrument: >2 MΩMaximum Input LevelMic: 7 dBu with a THD N <0.7% at 1 kHz measured at 0 dB of gain with 150Ω source impedance and 22 Hz to 22 kHz band-pass filterOutputs2 x XLR2 x 1/4″ TRS phone SendMaximum Output Level 24 dBu with a THD N <0.01% at 1 kHz measured with 150Ω source impedance and 22 Hz to 22 kHz band-pass filterPhantom Power 48V, individually switchableGain RangeMic: 0 dB to 60 dB in 10 dB steps, plus 0 dB to 20 dB continuously variable trimLine: -20 dB to 10 dB in 10 dB steps, plus 0 dB to 20 dB continuously variable trimInstrument: 10 dB to 40 dB continuously variable trimFrequency ResponseMic @ minimum gain (0 dB): 10 Hz to 135 kHz, -0.5/1 dBMic @ 60 dB gain: 10 Hz to 115 kHz, -6/-1 dBLine @ unity gain (0 dB): 10 Hz to 80 Hz, -0.3/-1 dBInstrument @ minimum gain ( 10 dB): 10 Hz to 115 kHz, -0.1/1 dBInstrument @ maximum gain ( 40 dB): 10 Hz to 110 kHz, -2.5/1 dBEIN-127 dB (60 dB of gain with 150Ω source impedance and 22 Hz to 22 kHz band-pass filter)NoiseMic: -97 dBu @ output with unity gain (0 dB) and 22 Hz to 22 kHz band-pass filterLine: -97 dBu @ output with unity gain (0 dB), measured with 50Ω source impedance and 22 Hz to 22 kHz band-pass filterInstrument: -95 dBu, minimum gain ( 10 dB) with 22 Hz to 22 kHz band-pass filterSignal to Noise RatioMic: 121 dB, with 24 dB maximum output (150Ω source impedance and 22 Hz to 22 kHz band-pass filter)Line: 121 dB, with 24 dB maximum output (50Ω source impedance and 22 Hz to 22 kHz band-pass filter)THD NMic: <0.0007% @ 1 kHz (-20 dBu input signal with 30 dB gain and 22 Hz to 22 kHz band-pass filter)Line: <0.002% @ 1 kHz (0 dBu input signal with 10 dB gain and 22 Hz to 22 kHz band-pass filter)CMRRMic Input @ 60 Hz: -94 dB, with 24 dBu maximum outputMic Input @ 10 kHz: -91 dB, with 24 dBu maximum outputCrosstalkMic: -85 dB (I/P = 0 dBu, gain = 0 dB @ 1 kHz input to channel A, channel B output)Line: -91 dB (I/P = 0 dBu, gain = 0dB @ 1 kHz input to channel A, channel B output)Power Requirements100~240 VAC, 50/60 HzDimensions19 x 11 x 1.7″ (480 x 280 x 44 mm)Weight8.2 lb (3.7 kg)Specialties18 dB per octave (3-pole) high-pass filter, continuously variable from 16 Hz to 420 Hz (-3 dB)Packaging InfoPackage Weight12 lbBox Dimensions (LxWxH)25.8 x 14.8 x 5.2″