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- FOCUSRITE ISA 428 MkII
Description
Now 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 (sold separately).
FOUR CLASSIC MIC PRES
ISA 428 MkII 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 ISA 110 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.
THE FOCUSRITE STUDIO CONSOLE REBORN IN YOUR DAW
The Focusrite Studio Console defined countless hits of the 80s and 90s, thanks in large part to its ISA 110 Equaliser and ISA 130 Dynamics Modules. Brainworx's bx_console Focusrite plug-in brings you stunningly accurate emulations of both in a single plug-in, perfectly capturing the famously warm, open sound of two of the most revered pieces of studio hardware ever made.
KEY FEATURES:
- Four ISA series transformer-based preamps — ISA series mic preamps have been the producers' choice on countless hit records over the last two decades.
- Eight-channel optional A-D converter — Four additional A-D converter inputs allow eight channels of high quality conversion, with a dynamic range of 122dB and jitter performance below 250 picoseconds.
- Selectable impedance — Ideal for mic matching or extended microphone creativity. Settings include the 'Vintage ISA110' setting, providing the original focusrite signature sound.
- Four front panel instrument inputs — Instant access on the face of the unit - no separate DI box required.
- Dedicated analogue insert points — Switchable insert points are featured on every channel, allowing routing (between preamp and output) through additional external processing.
- Accurate LED meters for every channel — Clear metering designed to catch even the fastest and most elusive of transients.
Specifications
Mic Inputs
- Frequency Response at Minimum Gain (0 dB): -0.35 dB at 20 Hz and -3 dB at 122 kHz
- Frequency Response at Maximum Gain (60 dB): -2.5 dB at 20 Hz and -3 dB at 103 kHz
- Gain Range: 0 dB to 60 dB in 10 dB steps, plus 0 dB to 20 dB continuously variable trim
- Maximum Headroom: 7.4 dBu
- Noise EIN: -126 dB, measured at 60 dB gain with 150 Ω termination and 20 Hz/22 kHz bandpass filter
- Noise at Main Output with Unity Gain: -98 dBu, measured with a 20 Hz/22 kHz bandpass filter
- SNR: 123 dB relative to maximum output (25 dBu); 120 dB relative to 0 dBFS (22 dBu)
- CMRR: 88 dB
- Input Impedance, Variable: 600 Ω, 1400 Ω, 2400 Ω, 6800 Ω
Line Inputs
- Frequency Response at Unity Gain (0 dB): -0.3 dB at 20 Hz and -3 dB at 94 kHz
- Gain Range: -20 dB to 10 dB in 10 dB steps, plus 0 dB to 20 dB continuously variable trim
- Maximum Headroom: 25.4 dBu
- THD+N: 0.002, measured with 4 dBu input signal, 0 dB gain setting, with a 20 Hz/22 kHz bandpass filter
- Noise at Main Output with Unity Gain: -91 dBu, measured with a 20 Hz/22 kHz bandpass filter
- SNR: 116 dB relative to maximum output (25 dBu); 113 dB relative to 0 dBFS (22 dBu)
- Input Impedance: 10 kΩ
Instrument Inputs
- Gain Range: 10 dB to 40 dB continuously variable
- Maximum Headroom: 11.5 dBu
- Noise at Main Output with Minimum Gain (10 dB): -95 dBu, measured with a 20 Hz/22 kHz bandpass filter
- Input Impedance: >1 MΩ
- Frequency Response at 10 dB Gain: -0.2 dB at 20 Hz and 0 dB at 200 kHz
- Frequency Response at 40 dB Gain: -3 dB at 20 Hz and -3 dB at 38.4 kHz
High-Pass Filter
- Roll-Off: 18 dB per octave, 3-pole filter
- Frequency Range: 16 Hz to 420 Hz, continuously variable, measured at the 3 dB down point
Front and Rear Connectivity
- Analogue Audio Outputs (Outputs 1-4): 4 line XLR outputs on rear panel
- Insert Outputs: 4 insert send 1/4" TRS jacks on rear panel
- Power Input: IEC power input connector
- Power Supply: 100 VAC - 240 VAC
In the Box
- ISA 428 MkII Four-Channel Mic Preamp Unit
- AC Power Cable
- Important Information Guide
- Safety & Environmental Information Sheet