Focusrite Pro ISA 428 MkII 4-Channel Microphone / Instrument Preamplier ISA428-MKII

The Focusrite ISA428 MkII provides four of Focusrite’s prestigious transformer-based microphone preamps. It features the same classic circuitry and renowned audio quality found in the original at a new level of affordability.And now you can add the iconic sound, feel, and styling of the legendary Focusrite console to your production toolkit simply by registering your ISA428 MKII. 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!With selectable input impedance, direct instrument inputs, and an optional eight channels of high-quality analog-to-digital conversion, the ISA428 MkII creates the perfect front end for the discerning recording professional.First introduced in 1985, the ISA microphone preamp holds a reputation for outstanding transparency along with subtle warmth contributed by transformer core saturation. The addition of a variable impedance circuit allows ISA users to perfectly match the preamp with any microphone, or to use different settings creatively to shape the sound of the microphone. Unchanged for decades, the ISA microphone preamp topology offers incredible clarity and the signature Focusrite sound that makes it the top choice among many audio professionals today.FeaturesFour ISA Series Transformer-Based PreampsEight-Channel Optional A-D ConverterSelectable ImpedanceFour Front Panel Instrument InputsDedicated Analogue Insert PointsVariable High-Pass Focusrite FilterAccurate LED Meters for Every ChannelSpecificationsMic Inputs:Frequency response @ minimum gain (0dB): -0.35dB at 20Hz and –3dB at 122kHzFrequency response @ maximum gain (60dB): –2.5dB at 20Hz and –3dB 103kHzGain range: 0dB to +60dB in 10dB steps, plus 0dB to +20dB continuously variable trimMaximum headroom: +7.4dBuTHD+N: 0.0009% (measured @ 1kHz -20dBu input signal, @ 30dB gain setting, with a 20Hz - 22kHz bandpass filter)Noise EIN: -126dB (measured @ 60dB of gain with 150Ω termination and 20Hz - 22kHz bandpass filter)Noise @ main output with unity gain: -98dBu (measured with a 20Hz - 22kHz bandpass filter)SNR: 123dB (relative to max output 25dBu)SNR: 120dB (relative to 0dBFS (+22dBu)CMRR: 88dB.Input Impedance, variable: 600Ω, 1400Ω, 2400Ωs, 6800ΩLine Inputs:Frequency Response @ unity gain (0dB): -0.3dB @ 20Hz and –3dB at 94kHzGain range: -20dB to +10dB in 10dB steps, plus 0dB to +20dB continuously variable trimMaximum headroom: +25.4dBuTHD+N: 0.002% (measured with +4dBu input signal, 0dB gain setting, with a 20Hz - 22kHz bandpass filter)Noise @ main output with unity gain: -91dBu (measured with a 20Hz - 22kHz bandpass filter)SNR: 116dB (relative to max output 25dBu)SNR: 113dB (relative to 0dBFS +22dBu). Input Impedance: 10kΩInstrument