{"product_id":"isa-428-mkii-gfo02000181","title":"Focusrite ISA 428 MKII","description":"\u003ch2\u003eDescription\u003c\/h2\u003e\u003cp\u003eFocusrite ISA microphone preamplifiers date back to 1985, when Sir George Martin asked console designer Rupert Neve to create new modules for the AIR Studio console in Montserrat. The modules created included the legendary ISA110, on which all ISA microphone preamplifiers are based. With their characteristic Lundahl LL1538 input transformer, and a concession to modernity - variable input impedance - ISA microphone preamplifiers are very similar to what they were 30 years ago. But today, instead of exclusively gracing consoles at AIR Studio, ISA microphone pres are at the heart of hundreds of hits produced in the world's most important studios by the best engineers, artists, and producers.\u003c\/p\u003e\u003cp\u003eNow in its second generation, the ISA 428 Mk II incorporates 4 renowned Focusrite microphone pres in an easy-to-use layout with a 2-rack unit footprint, giving you 4 microphone preamplifiers, instrument inputs, and line inputs at your fingertips. The original Focusrite microphone pre was designed for microphones of the time; today's model features a small change: with the addition of 3 additional input impedances to the classic ISA110 settings, it allows you to match any microphone and access a wide range of sounds, from the character and warmth of a vintage microphone to the clear transparency of modern microphones. Or you can experiment and highlight the qualities you desire. Front panel instrument inputs.\u003c\/p\u003e\u003cp style=\"text-align: justify;\"\u003e\u0026nbsp;\u003c\/p\u003e\u003cp style=\"text-align: justify;\"\u003e\u003cstrong\u003e3-year warranty\u003c\/strong\u003e on all new \u003cstrong\u003eFocusrite\u003c\/strong\u003e products purchased from January 1, 2018 onwards. The Focusrite Warranty means peace of mind for the user, representing a professional service that minimizes waiting times should a manufacturing defect occur, and confirms that the English company's products are built to high quality standards.\u003c\/p\u003e\u003cp style=\"text-align: justify;\"\u003e\u0026nbsp;\u003c\/p\u003e\u003cp\u003eIn addition to the microphone inputs, there are 4 instrument inputs on the front panel, making the ISA428 Mk II ideal for overdubs in the control room without needing a DI box. On the rear panel: 4 line inputs and switchable insert points on each channel allow routing through an external signal processor. An optional 8-channel precision A-D converter with 122 dB dynamic range and superb jitter performance is available for the ISA428 Mk II - ideal for simple interaction with your DAW.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eMain features\u003c\/strong\u003e\u003c\/h3\u003e\u003ch4\u003e\u003cstrong\u003e4 ISA series preamplifiers with transformer\u003c\/strong\u003e\u003c\/h4\u003e\u003cp\u003eISA series microphone preamplifiers have been the choice of producers on countless hit records over the past two decades.\u003c\/p\u003e\u003ch4\u003e\u003cstrong\u003eOptional 8-channel A-D converter\u003c\/strong\u003e\u003c\/h4\u003e\u003cp\u003eFour additional A-D converter inputs allow for quality 8-channel conversion, with a dynamic range of 122dB and jitter below 250 picoseconds.\u003c\/p\u003e\u003ch4\u003e\u003cstrong\u003eSelectable impedance\u003c\/strong\u003e\u003c\/h4\u003e\u003cp\u003eIdeal for matching microphones or expanding creativity. Settings include 'Vintage ISA110' which provides the original Focusrite sound.\u003c\/p\u003e\u003ch4\u003e\u003cstrong\u003e4 instrument inputs on the front panel\u003c\/strong\u003e\u003c\/h4\u003e\u003cp\u003eImmediate access from the front panel - no separate DI boxes required.\u003c\/p\u003e\u003ch4\u003e\u003cstrong\u003eDedicated analog insert points\u003c\/strong\u003e\u003c\/h4\u003e\u003cp\u003eSwitchable insert points on each channel allow routing (between preamp and output) through additional external processing.\u003c\/p\u003e\u003ch4\u003e\u003cstrong\u003eAccurate LED meters for each channel\u003c\/strong\u003e\u003c\/h4\u003e\u003cp\u003eClear metering designed to capture even the fastest and most elusive transient.\u003c\/p\u003e \u003ch4\u003e\u003cu\u003e\u003cstrong\u003eMain technical specifications:\u003c\/strong\u003e\u003c\/u\u003e\u003c\/h4\u003e\u003cp\u003eFour ISA Series transformer-based preamplifiers\u003cbr \/\u003eOptional 8-channel A-D converter\u003cbr \/\u003eSelectable Impedance\u003cbr \/\u003eFour front panel instrument inputs\u003cbr \/\u003eDedicated Analog Insert Points\u003cbr \/\u003eFocusrite Variable High-Pass Filter\u003cbr \/\u003eHighly accurate LED Meters on each channel\u003c\/p\u003e\u003ch4\u003e\u003cu\u003e\u003cstrong\u003eOther features:\u003c\/strong\u003e\u003c\/u\u003e\u003c\/h4\u003e\u003cp\u003ePhantom power on each channel\u003cbr \/\u003eA Trim control allowing 20dB of extra gain with precise adjustments\u003cbr \/\u003ePhase inversion buttons that help correct phase problems with microphones and cables\u003cbr \/\u003eOptional A-D converter that easily synchronizes to an external word clock\u003c\/p\u003e\u003ch4\u003e\u003cu\u003e\u003cstrong\u003eMic Inputs\u003c\/strong\u003e\u003c\/u\u003e\u003c\/h4\u003e\u003cp\u003eFrequency response at minimum gain (0dB): -0.35dB at 20Hz and –3dB at 122kHz\u003cbr \/\u003eFrequency response at maximum gain (60dB): –2.5dB at 20Hz and –3dB at 103kHz\u003cbr \/\u003eGain range: 0dB to +60dB in 10dB steps, plus 0dB to +20dB with continuously variable trim\u003cbr \/\u003eMaximum headroom: +7.4dBu\u003cbr \/\u003eTHD+N: 0.0009% (measured with a 1kHz -20dBu signal, at 30dB gain, with a 20Hz\/22kHz bandpass filter)\u003cbr \/\u003eEIN noise: -126dB (measured at 60dB gain with 150Ω termination and 20Hz\/22kHz bandpass filter)\u003cbr \/\u003eMain output noise at unity gain: -98dBu (measured with 20Hz\/22kHz bandpass filter)\u003cbr \/\u003eSNR: 123dB (relative to maximum output of 25dBu)\u003cbr \/\u003eSNR: 120dB (relative to 0dBFS (+22dBu)\u003cbr \/\u003eCMRR: 88dB. Input impedance, variable as follows:\u003c\/p\u003e\u003ch4\u003e\u003cu\u003e\u003cstrong\u003eImpedance setting Equivalent value at 1kHz\u003c\/strong\u003e\u003c\/u\u003e\u003c\/h4\u003e\u003cp\u003eLow 600Ω\u003cbr \/\u003eISA110 1400Ω\u003cbr \/\u003eMed (Medium) 2400Ω\u003cbr \/\u003eHigh 6800Ω\u003c\/p\u003e\u003ch4\u003e\u003cu\u003e\u003cstrong\u003eLine Inputs\u003c\/strong\u003e\u003c\/u\u003e\u003c\/h4\u003e\u003cp\u003eFrequency response at unity gain (0dB): -0.3dB at 20Hz and –3dB at 94kHz\u003cbr \/\u003eGain range: -20dB to +10dB in 10dB steps, plus 0dB to +20dB with continuously variable trim\u003cbr \/\u003eMaximum headroom: +25.4dBu\u003cbr \/\u003eTHD+N: 0.002% (measured with a +4dBu signal, with gain set to 0dB, and 20Hz\/22kHz bandpass filter)\u003cbr \/\u003eNoise on main output at: -91dBu (measured with 20Hz\/22kHz bandpass filter)\u003cbr \/\u003eSNR: 116dB (relative to maximum output of 25dBu)\u003cbr \/\u003eSNR: 113dB (relative to 0dBFS +22dBu). Input impedance: 10kΩ\u003c\/p\u003e\u003ch4\u003e\u003cu\u003e\u003cstrong\u003eInstrument Inputs\u003c\/strong\u003e\u003c\/u\u003e\u003c\/h4\u003e\u003cp\u003eFrequency response at +10dB gain: -0.2dB at 20Hz and 0dB at 200kHz\u003cbr \/\u003eFrequency response at +40dB gain: -3dB at 20Hz and –3dB at 38.4kHz\u003cbr \/\u003eGain range: +10dB to +40dB continuously variable\u003cbr \/\u003eMaximum headroom: +11.5dBu\u003cbr \/\u003eTHD+N: 0.006% (measured with an input signal of –20dBu, at minimum gain (+10dB), with 20Hz\/22kHz bandpass filter)\u003cbr \/\u003eNoise on main output at minimum gain (+10dB): -95dBu (measured with a 20Hz\/22kHz bandpass filter)\u003cbr \/\u003eInput impedance = \u003e1MΩ\u003c\/p\u003e\u003ch4\u003e\u003cu\u003e\u003cstrong\u003eHigh-Pass Filter\u003c\/strong\u003e\u003c\/u\u003e\u003c\/h4\u003e\u003cp\u003eRoll off = 18dB per octave, 3-pole filter\u003cbr \/\u003eFrequency range: 16Hz to 420Hz (continuously variable, measured at -3dB)\u003c\/p\u003e\u003ch4\u003e\u003cu\u003e\u003cstrong\u003eMeters\u003c\/strong\u003e\u003c\/u\u003e\u003c\/h4\u003e\u003cp\u003e6-LED meter, calibrated as follows: 0dBFS = +22dBu (Maximum level that can be correctly converted by the optional internal AD converter before overload occurs)\u003c\/p\u003e\u003cp\u003eThe meter calibration points are:\u003c\/p\u003e\u003ctable border=\"1\" cellpadding=\"0\" cellspacing=\"0\" style=\"width:100%\"\u003e    \u003ctbody\u003e        \u003ctr\u003e            \u003ctd\u003e\u0026nbsp;\u003cstrong\u003eMeter calibration values in dBFS\u003c\/strong\u003e\u003c\/td\u003e            \u003ctd\u003e\u0026nbsp;\u003cstrong\u003eEquivalent in dBu\u003c\/strong\u003e\u003c\/td\u003e        \u003c\/tr\u003e        \u003ctr\u003e            \u003ctd\u003e\u0026nbsp;0dBFS\u003c\/td\u003e            \u003ctd\u003e\u0026nbsp;+22dBu\u003c\/td\u003e        \u003c\/tr\u003e        \u003ctr\u003e            \u003ctd\u003e\u0026nbsp;-2dBFS\u003c\/td\u003e            \u003ctd\u003e\u0026nbsp;+20dBu\u003c\/td\u003e        \u003c\/tr\u003e        \u003ctr\u003e            \u003ctd\u003e\u0026nbsp;-6dBFS\u003c\/td\u003e            \u003ctd\u003e\u0026nbsp;+16dBu\u003c\/td\u003e        \u003c\/tr\u003e        \u003ctr\u003e            \u003ctd\u003e\u0026nbsp;-12dBFS\u003c\/td\u003e            \u003ctd\u003e\u0026nbsp;+10dBu\u003c\/td\u003e        \u003c\/tr\u003e        \u003ctr\u003e            \u003ctd\u003e\u0026nbsp;-18dBFS\u003c\/td\u003e            \u003ctd\u003e\u0026nbsp;+4dBu\u003c\/td\u003e        \u003c\/tr\u003e        \u003ctr\u003e            \u003ctd\u003e\u0026nbsp;-42dBFS\u003c\/td\u003e            \u003ctd\u003e\u0026nbsp;-20dBu\u003c\/td\u003e        \u003c\/tr\u003e    \u003c\/tbody\u003e\u003c\/table\u003e\u003ch4\u003e\u003cu\u003e\u003cstrong\u003eAnalog Channel Inputs (Inputs 1-4)\u003c\/strong\u003e\u003c\/u\u003e\u003c\/h4\u003e\u003cp\u003e4 instrument inputs on front panel 1\/4” TS jacks\u003cbr \/\u003e4 microphone inputs on rear panel XLR\u003cbr \/\u003e4 line inputs on rear panel 1\/4” TRS jacks\u003cbr \/\u003e4 insert returns on rear panel 1\/4” TRS jacks\u003cbr \/\u003e4 ADC inputs on rear panel XLR\u003c\/p\u003e\u003ch4\u003e\u003cu\u003e\u003cstrong\u003eAnalog Audio Outputs (Outputs 1-4)\u003c\/strong\u003e\u003c\/u\u003e\u003c\/h4\u003e\u003cp\u003e4 line outputs on rear panel XLR\u003cbr \/\u003e4 insert sends on rear panel 1\/4” TRS jack\u003c\/p\u003e\u003ch4\u003e\u003cu\u003e\u003cstrong\u003eOther I\/O\u003c\/strong\u003e\u003c\/u\u003e\u003c\/h4\u003e\u003cp\u003eIEC 100Vac – 240Vac power input connector\u003c\/p\u003e\u003ch4\u003e\u003cu\u003e\u003cstrong\u003eFront panel indicators\u003c\/strong\u003e\u003c\/u\u003e\u003c\/h4\u003e\u003cp\u003e8 x 6-segment output meters\u003cbr \/\u003e4 x 30-60 mic gain range selection indicators\u003cbr \/\u003e4 x +48V phantom power indicators\u003cbr \/\u003e4 x Phase indicators\u003cbr \/\u003e4 x Insert In indicators\u003cbr \/\u003e4 x Filter In indicators\u003cbr \/\u003e4 x Input selection indicators (Mic, Line, Inst)\u003cbr \/\u003e4 x Z In input impedance selection indicators (Low, ISA110, Med, High)\u003cbr \/\u003eClock selection indicators (44.1, 48, 88.2, 96, 176.4, 192)\u003cbr \/\u003eExt clock indicators (Lock, Word clock, 256X)\u003c\/p\u003e\u003ch4\u003e\u003cu\u003e\u003cstrong\u003eDimensions (W x H x D)\u003c\/strong\u003e\u003c\/u\u003e\u003c\/h4\u003e\u003cp\u003eUnboxed: approx. 480 mm x 88 mm x 280 mm (19 x 3.5 x 11 inches)\u003cbr \/\u003eBoxed: approx. 620 mm x 460 mm x 210 mm (24.4 x 18.1 x 8.3 inches)\u003c\/p\u003e\u003ch4\u003e\u003cu\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/u\u003e\u003c\/h4\u003e\u003cp\u003eNet: 5.5 kg \/ 12.2 lbs\u003cbr \/\u003eBoxed: approx. 10.5 kg \/ 23.1 lbs\u003c\/p\u003e\u003ch4\u003e\u003cstrong\u003e\u003cu\u003eWhat are the differences between the ISA428 and the ISA428 MkII?\u003c\/u\u003e\u003c\/strong\u003e\u003c\/h4\u003e\u003cp\u003eIt should come as no surprise that some features of the original ISA428 have been removed to offer the ISA428 MkII at such a competitive price. However, it is important to note that the analog circuit board used in the ISA428 MkII is exactly the same as used in the original. Internal tests we conducted on the new model suggest that interference in the audible frequency range has even been reduced compared to the original.\u003c\/p\u003e\u003cp\u003eHere is a summary of the changes made to the new ISA428 MkII model compared to the original:\u003c\/p\u003e\u003cul style=\"margin-left:17px\"\u003e    \u003cli\u003e\u003cstrong\u003eThe analog ‘moving coil’ peak meters have been removed.\u003c\/strong\u003e\u003cbr \/\u003e    On the ISA 428 MKII, the LED meters remain and, in the signal chain, are located before the A-D converter, allowing for precise metering before conversion.\u003c\/li\u003e    \u003cli\u003e\u003cstrong\u003eThe Soft Limiter function has been removed.\u003c\/strong\u003e\u003cbr \/\u003e    Previously, a soft limiter was available to compress signals before the A-D converter inputs, reducing the chances of digital clipping. Without this limiter, the user only needs to monitor signal levels as they would on any other AD converter to avoid clipping and preserve audio quality. This brings the ISA428 MkII in line with the ISA828, which never had optical soft limiters. \u0026nbsp;\u003c\/li\u003e    \u003cli\u003e\u003cstrong\u003eThe bit resolution selection button has been removed from the front panel.\u003c\/strong\u003e\u003cbr \/\u003e    The ability to change the bit resolution for the A-D converter was a useful feature when the ISA 428 was first introduced to the market. Since then, technology has moved forward and the majority of users (if not all) now prefer to use dithering algorithms within their digital audio workstations for this purpose. The ability to change the bit resolution is actually still available via a jumper setting in the hardware on the A-D converter board. However, to achieve the highest audio quality, it is recommended to convert to the highest available bit resolution (24-bit). If a lower resolution is needed, good quality dithering, to be used later in the signal flow, produces the best results.\u003c\/li\u003e    \u003cli\u003e\u003cstrong\u003eThe linear power supply has been replaced with a switching power supply.\u003c\/strong\u003e\u003cbr \/\u003e    Aside from cost savings, this change brings several advantages to the ISA428 MkII: firstly, heat output is significantly reduced, protecting not only the circuitry inside the ISA428 MkII, but also adjacent equipment in the studio. The new power supply automatically switches input voltages. It can be connected to almost any power grid in the world without having to change the voltage selector or a fuse. The weight has also been greatly reduced: an important aspect for touring engineers and musicians. While some believe that linear power supplies are indispensable in audio equipment, the truth is that the switching power supply offers significant advantages in terms of convenience and reliability while maintaining very similar audio specifications to the original unit.\u003c\/li\u003e\u003c\/ul\u003e \u003cp\u003e\u003ciframe width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/3HzyPdkq5mE\" frameborder=\"0\" allow=\"accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen\u003e\u003c\/iframe\u003e\u003c\/p\u003e\u003cp\u003e\u003ciframe width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/Vu_hEdgn8Pw\" frameborder=\"0\" allow=\"accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen\u003e\u003c\/iframe\u003e\u003c\/p\u003e\u003ch4\u003eDrum tutorial recording\u003c\/h4\u003e\u003cp\u003e\u003ciframe width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/IPtlLSb_y-s\" frameborder=\"0\" allow=\"accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen\u003e\u003c\/iframe\u003e\u003c\/p\u003e\u003ch4\u003eIn the studio with \"The Naked and Famous\"\u003c\/h4\u003e\u003cp\u003e\u003ciframe width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/Twmm8NIlU3s\" frameborder=\"0\" allow=\"accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen\u003e\u003c\/iframe\u003e\u003c\/p\u003e","brand":"FOCUSRITE","offers":[{"title":"Default Title","offer_id":58003734888793,"sku":"GFO02000181","price":1964.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1036\/3633\/6985\/files\/26-focusrite-isa-428-mkii-gfo02000181_0.jpg?v=1778131008","url":"https:\/\/yourmusiconline.it\/en\/products\/isa-428-mkii-gfo02000181","provider":"yourmusiconline.it","version":"1.0","type":"link"}