Focusrite ISA 428 MkII 4 Channel Classic ISA Mic Preamp/DI

Description The ISA428 MkII from Focusrite is a four-channel microphone preamp featuring Focusrite’s transformer-based preamps. With selectable input impedance, direct instrument inputs and an optional eight channels of high-quality analog to digital conversion, the unit is a perfect front end for the audio professional, whether utilizing digital or analog recording.The ISA microphone preamp holds a reputation for delivering transparency along with subtle warmth derived from transformer core saturation. The addition of a variable impedance circuit allows users to perfectly match the preamp with any microphone, or to use different settings creatively to shape the sound of the microphone.The extremely broad frequency response of Focusrite preamps (close to 200 kHz at the top end) guarantees accurate phase response across the range of human hearing, with the roll-off point being moved entirely outside of the audible hearing range. Warmth, plus beautifully open, unrestricted high frequencies, is a classic hallmark of the mid 80’s Focusrite designs to which this preamp owes its design.The optional eight-channel analog converter utilizes high-quality Burr-Brown amplifiers and PCM4220 A-D converter chips seated within Focusrite’s custom analog circuitry. Specifications include a dynamic range of 122dB and jitter performance below 250 picoseconds. The card can be retrofitted at any time and due to the convenient 25-pin D-type connector, it integrates seamlessly with most digital workstations, including Pro Tools.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. FeaturesFour ISA Series Transformer-Based PreampsISA series microphone preamps have been the producers’ choice on countless hit records over the last two decadesEight-Channel A-D Converter (Optional)Four additional A-D converter inputs allow eight channels of high-quality conversion, with a dynamic range of 122dB and jitter performance below 250 picosecondsSelectable ImpedanceIdeal for microphone matching or extended microphone creativity – settings include the “Vintage ISA110” setting that provides the original Focusrite signature sound?Four Front Panel Instrument Inputs?Instant access on the front fascia – no separate DI box requiredDedicated Analog Insert PointsSwitchable insert points are featured on every channel, allowing routing (between pre-amp and output) through additional external processingVariable High-Pass Focusrite FilterProvided on every channel, this is the same filter as featured on the original ISA428Accurate LED Meters for Every Channel?Clear metering designed to catch even the fastest and most elusive of transientsAdditional FeaturesPhantom power available on every channelTrim control allows 20dB of extra gain with fine adjustmentPhase reverse buttons help to correct phase issues with microphones or cablesOptional A-D converters easily synchronize to external word clockIncludes Brainworx bx_console Focusrite SC channel-strip plug-in, a stellar digital emulation of the legendary and rare Focusrite Studio Console SpecificationsNumber of Channels4Inputs4 x XLR Microphone (rear panel)4 x 1/4″ TS phone Instrument (front panel)4 x 1/4″ TRS phone Line (rear panel)4 x 1/4″ TRS phone Insert Return (front Panel)4 x XLR ADC Input for optional AD converter card (rear panel)Output4 x XLR Line (rear panel)4 x 1/4″ TRS phone Insert Send (rear panel)Phantom Power 48V individually switchableMulti FunctionHas provision for optional analog to digital converterGain RangeMicrophone: 0dB to 60dB in 10dB steps, plus 0dB to 20dB continuously variable trimLine: -20dB to 10dB in 10dB steps, plus 0dB to 20dB continuously variable trimInstrument:  10dB to 40dB continuously variableInput ImpedanceMicrophone: 600Ω, 1.4kΩ, 2.4kΩ, 6.8kΩLine: 10kΩInstrument: