EAN: 815301005124
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 ISAmicrophone 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.
Apremium 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.
Four ISASeries Transformer-Based Preamps
ISAseries microphone preamps have been the producers choice on countless hit records over the last two decades
Eight-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 picoseconds
Selectable Impedance
Ideal 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 required
Dedicated Analog Insert Points
Switchable insert points are featured on every channel, allowing routing (between pre-amp and output) through additional external processing
Variable High-Pass Focusrite Filter
Provided on every channel, this is the same filter as featured on the original ISA428
Accurate LED Meters for Every Channel ¨
Clear metering designed to catch even the fastest and most elusive of transients
Additional Features
- Phantom power available on every channel
- Trim control allows 20dB of extra gain with fine adjustment
- Phase reverse buttons help to correct phase issues with microphones or cables
- Optional A-D converters easily synchronize to external word clock
- Includes Brainworx bx_console Focusrite SC channel-strip plug-in, a stellar digital emulation of the legendary and rare Focusrite Studio Console
Focusrite ISA428 MkII Specs
| Number of Channels | 4 |
| Inputs | 4 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) |
| Output | 4 x XLR Line (rear panel) 4 x 1/4" TRS phone Insert Send (rear panel) |
| Phantom Power | +48V individually switchable |
| Multi Function | Has provision for optional analog to digital converter |
| Gain Range | Microphone: 0dB to +60dB in 10dB steps, plus 0dB to +20dB continuously variable trim Line: -20dB to +10dB in 10dB steps, plus 0dB to +20dB continuously variable trim Instrument: +10dB to +40dB continuously variable |
| Input Impedance | Microphone: 600©, 1.4k©, 2.4k©, 6.8k© Line: 10k© Instrument: >1M© |
| Maximum Output Level | Microphone: +7.4dBu Line: +25.4dBu Instrument: +11.5dBu |
| Frequency Response | Microphone: -0.35dB at 20Hz and -3.0dB at 122kHz (0dB gain) and -2.5dB at 20Hz and -3.0dB at 103kHz (60dB gain) Line: -0.3dB at 20Hz and -3dB at 94kHz (0dB gain) Instrument: -0.2dB at 20Hz and 0dB at 200kHz (+10dB gain) and -3.0dB at 20Hz and -3.0dB at 38.4kHz (+40dB gain) |
| THD + N | Microphone: 0.0009% (measured at 1kHz, -20dBu input signal, at 30dB gain setting, with a 20Hz/22kHz bandpass filter) Line: 0.002% (measured with +4dBu input signal, 0dB gain setting, with a 20Hz/22kHz bandpass filter) Instrument: 0.006% (measured with -20dBu input signal, at minimum gain (+10dB), with a 20Hz/22kHz bandpass filter) |
| Noise | Microphone:
Line:
Instrument:
|
| CMRR | Microphone: 88dB |
| Meters | Each 6-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: Meter panel calibration value in dBFS / Equivalent dBu value:
|
| Power Requirements | 100VAC~240VAC |
| Dimensions | 19 x 11 x 3.5" (483 x 279 x 89mm) |
| Weight | 12.2 lbs (5.5kg) |
| Specialties | High Pass Filter Roll off = 18dB per octave 3 pole filter Frequency range: 16Hz to 420Hz (continuously variable, measured at the 3.0dB down point) |
Packaging Info
| Package Weight | 15.5 lb |
| Box Dimensions (LxWxH) | 25 x 18 x 9" |
In the Box
- Focusrite ISA428 MkII Rackmount 4-Channel Microphone Preamp
- AC Power Cable
- 3-Year Manufacturer Warranty
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