{"product_id":"focusrite-isa428-mkii-4-channel-microphone-preamp-1569062","title":"Focusrite ISA428 MkII 4-channel Microphone Preamp","description":"\u003cp\u003e\u003ci\u003e\u003cb\u003eCondition:\u003c\/b\u003e This item is subject to minor wear from use.\u003c\/i\u003e\u003c\/p\u003e\u003cbr\u003eNow in its second generation, the ISA 428 Mk II incorporates four of Focusrite's renowned mic pres in a simple-to-operate 2U enclosure, placing four mic preamps, instrument inputs and line ins at your fingertips. The original Focusrite mic pre was designed to suit the microphones of the time; today's model makes one small change, adding three additional input impedances to the classic ISA110 setting, allowing you to match any microphone, old or new, and access a wide range of sounds, from the character and warmth of a vintage mic to the clear transparency of a modern design. Or you can experiment and bring out just the qualities you want.In addition to the mic inputs, there are four front-panel instrument inputs making the ISA428 Mk II ideal for overdubs in the control room with no need for a DI box. On the back: four line inputs and switchable insert points on each channel to allow routing via external signal processors. There's also a versatile, vintage design variable high-pass filter to control what's going on at the bass end. And finally… accurate, 6-LED meters to tell you exactly what's going down. Optionally available for the ISA428 Mk II is a precision eight-channel A-D converter with 122dB dynamic range and superb jitter performance – ideal for simple interfacing with your DAW.\u003cbr\u003e\u003cbr\u003e\u003cb\u003eFour ISA series transformer-based preamps\u003c\/b\u003e\u003cbr\u003eISA series mic preamps have been the producers' choice on countless hit records over the last two decades.\u003cbr\u003e\u003cbr\u003e\u003cb\u003eEight-channel optional A-D converter\u003c\/b\u003e\u003cbr\u003eFour additional A-D converter inputs allow eight channels of high quality conversion, with a dynamic range of 122dB and jitter performance below 250 picoseconds.\u003cbr\u003e\u003cbr\u003e\u003cb\u003eSelectable impedance\u003c\/b\u003e\u003cbr\u003eIdeal for mic matching or extended microphone creativity. Settings include the 'Vintage ISA110' setting, providing the original focusrite signature sound.\u003cbr\u003e\u003cbr\u003e\u003cb\u003eFour front panel instrument inputs\u003c\/b\u003e\u003cbr\u003eInstant access on the front fascia - no separate DI box required.\u003cbr\u003e\u003cbr\u003e\u003cb\u003eDedicated analogue insert points\u003c\/b\u003e\u003cbr\u003eSwitchable insert points are featured on every channel, allowing routing (between preamp and output) through additional external processing.\u003cbr\u003e\u003cbr\u003e\u003cb\u003eAccurate LED meters for every channel\u003c\/b\u003e\u003cbr\u003eClear metering designed to catch even the fastest and most elusive of transients.\u003cbr\u003e\u003cbr\u003e\u003cb\u003eMic Inputs\u003c\/b\u003e\u003cul\u003e\n\u003cli\u003eFrequency response at minimum gain (0dB): -0.35dB at 20Hz and –3dB at 122kHz\u003c\/li\u003e\n\u003cli\u003eFrequency response at maximum gain (60dB): –2.5dB at 20Hz and –3dB 103kHz\u003c\/li\u003e\n\u003cli\u003eGain range: 0dB to +60dB in 10dB steps, plus 0dB to +20dB continuously variable trim\u003c\/li\u003e\n\u003cli\u003eMaximum headroom: +7.4dBu\u003c\/li\u003e\n\u003cli\u003eTHD+N: 0.0009% (measured at 1kHz -20dBu input signal, at 30dB gain setting, with a 20Hz\/22kHz bandpass filter)\u003c\/li\u003e\n\u003cli\u003eNoise EIN: -126dB (measured at 60dB of gain with 150Ω termination and 20Hz\/22kHz bandpass filter)\u003c\/li\u003e\n\u003cli\u003eNoise at main output with unity gain: -98dBu (measured with a 20Hz\/22kHz bandpass filter)\u003c\/li\u003e\n\u003cli\u003eSNR: 123dB (relative to max output 25dBu)\u003c\/li\u003e\n\u003cli\u003eSNR: 120dB (relative to 0dBFS (+22dBu)\u003c\/li\u003e\n\u003cli\u003eCMRR: 88dB.\u003c\/li\u003e\n\u003cli\u003eInput Impedance, variable: 600Ω, 1400Ω, 2400Ω, 6800Ω\u003c\/li\u003e\n\u003c\/ul\u003e\u003cb\u003eLine Inputs\u003c\/b\u003e\u003cul\u003e\n\u003cli\u003eFrequency Response at unity gain (0dB): -0.3dB at 20Hz and –3dB at 94kHz\u003c\/li\u003e\n\u003cli\u003eGain range: -20dB to +10dB in 10dB steps, plus 0dB to +20dB continuously variable trim\u003c\/li\u003e\n\u003cli\u003eMaximum headroom: +25.4dBu\u003c\/li\u003e\n\u003cli\u003eTHD+N: 0.002% (measured with +4dBu input signal, 0dB gain setting, with a 20Hz\/22kHz bandpass filter)\u003c\/li\u003e\n\u003cli\u003eNoise at main output with unity gain: -91dBu (measured with a 20Hz\/22kHz bandpass filter)\u003c\/li\u003e\n\u003cli\u003eSNR: 116dB (relative to max output 25dBu)\u003c\/li\u003e\n\u003cli\u003eSNR: 113dB (relative to 0dBFS +22dBu). Input Impedance: 10kΩ\u003c\/li\u003e\n\u003c\/ul\u003e\u003cb\u003eInstrument Inputs\u003c\/b\u003e\u003cul\u003e\n\u003cli\u003eFrequency Response at +10dB gain: -0.2dB at 20Hz and 0dB at 200kHz\u003c\/li\u003e\n\u003cli\u003eFrequency Response at +40dB gain: -3dB at 20Hz and –3dB at 38.4kHz\u003c\/li\u003e\n\u003cli\u003eGain range: +10dB to +40dB continuously variable\u003c\/li\u003e\n\u003cli\u003eMaximum headroom: +11.5dBu\u003c\/li\u003e\n\u003cli\u003eTHD+N: 0.006% (measured with –20dBu input signal, at minimum gain (+10dB), with a 20Hz\/22kHz bandpass filter)\u003c\/li\u003e\n\u003cli\u003eNoise at main output with minimum gain (+10dB): -95dBu (measured with a 20Hz\/22kHz bandpass filter)\u003c\/li\u003e\n\u003cli\u003eInput Impedance = \u0026gt;1MΩ\u003c\/li\u003e\n\u003c\/ul\u003e\u003cb\u003eHigh Pass Filter\u003c\/b\u003e\u003cul\u003e\n\u003cli\u003eRoll off = 18dB per octave 3 pole filter\u003c\/li\u003e\n\u003cli\u003eFrequency range: 16Hz to 420Hz (continuously variable, measured at the 3dB down point)\u003c\/li\u003e\n\u003c\/ul\u003e\u003cb\u003eMeters\u003c\/b\u003e\u003cul\u003e\n\u003cli\u003e6 LED meter is calibrated 0dBFS = +22dBu (the maximum level which can be correctly converted by the optional internal A\/D converter before overload occurs). The meter calibration points are as follows:\u003c\/li\u003e\n\u003cli\u003eMeter panel calibration value in dBFS \/ Equivalent dBu value\u003c\/li\u003e\n\u003cli\u003e0dBFS \/ +22dBu\u003c\/li\u003e\n\u003cli\u003e-2dBFS \/ +20dBu\u003c\/li\u003e\n\u003cli\u003e-6dBFS \/ +16dBu\u003c\/li\u003e\n\u003cli\u003e-12dBFS \/ +10dBu\u003c\/li\u003e\n\u003cli\u003e-18dBFS \/ +4dBu\u003c\/li\u003e\n\u003cli\u003e-42dBFS \/ -20dBu\u003c\/li\u003e\n\u003c\/ul\u003e\u003cb\u003eAnalogue Channel Inputs (Inputs 1-4)\u003c\/b\u003e\u003cul\u003e\n\u003cli\u003e4 instrument 1⁄4\" TS jack inputs on front panel\u003c\/li\u003e\n\u003cli\u003e4 microphone XLR inputs on rear panel\u003c\/li\u003e\n\u003cli\u003e4 line 1⁄4\" TRS jacks on rear panel\u003c\/li\u003e\n\u003cli\u003e4 insert return 1⁄4\" TRS jacks on rear panel\u003c\/li\u003e\n\u003cli\u003e4 ADC XLR inputs on rear panel\u003c\/li\u003e\n\u003c\/ul\u003e\u003cb\u003eAnalogue Audio Outputs (Outputs 1-4)\u003c\/b\u003e\u003cul\u003e\n\u003cli\u003e4 line XLR outputs on rear panel\u003c\/li\u003e\n\u003cli\u003e4 insert send 1⁄4\" TRS jacks on rear panel\u003c\/li\u003e\n\u003c\/ul\u003e\u003cb\u003eOther I\/O\u003c\/b\u003e\u003cul\u003e\u003cli\u003eIEC power input connector 100Vac – 240Vac\u003c\/li\u003e\u003c\/ul\u003e\u003cb\u003eFront Panel Indicators\u003c\/b\u003e\u003cul\u003e\n\u003cli\u003e8 output meters, 6 segment\u003c\/li\u003e\n\u003cli\u003e4 30-60 mic gain range selection indicator\u003c\/li\u003e\n\u003cli\u003e4 +48V phantom power indicator\u003c\/li\u003e\n\u003cli\u003e4 Phase indicator\u003c\/li\u003e\n\u003cli\u003e4 Insert In indicator\u003c\/li\u003e\n\u003cli\u003e4 Filter In indicator\u003c\/li\u003e\n\u003cli\u003e4 Input selection indicators (Mic, Line, Inst)\u003c\/li\u003e\n\u003cli\u003e4 Z In microphone input impedance selection indicators (Low, ISA110, Med, High) Clock select indicators (44.1, 48, 88.2, 96, 176.4, 192)\u003c\/li\u003e\n\u003cli\u003eExt clock indicators (Lock, Word clock, 256X)\u003c\/li\u003e\n\u003c\/ul\u003e\u003cb\u003eWeight\u003c\/b\u003e\u003cul\u003e\n\u003cli\u003e5.5kg\u003c\/li\u003e\n\u003cli\u003e12.2lbs\u003c\/li\u003e\n\u003c\/ul\u003e\u003cb\u003eDimensions (W x H x D)\u003c\/b\u003e\u003cul\u003e\n\u003cli\u003e480mm (W) x 88mm (H) x 280mm (D)\u003c\/li\u003e\n\u003cli\u003e19\" (W) x 3.5\" (H) x 11\" (D)\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Focusrite","offers":[{"title":"Default Title","offer_id":40060808495239,"sku":"AMS-ISA428MK2-DEMO","price":22843.0,"currency_code":"MXN","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0343\/4368\/2183\/products\/focusrite-home-audio-preamps-focusrite-isa428-mkii-4-channel-microphone-preamp-ams-isa428mk2-demo-29541856215175.jpg?v=1661192058","url":"https:\/\/www.chicagomusicexchange.com\/en-mx\/products\/focusrite-isa428-mkii-4-channel-microphone-preamp-1569062","provider":"Chicago Music Exchange","version":"1.0","type":"link"}