A 4-pack of Focusrite microphone preamplifiers has never been so affordable! Focusrite's ISA428 MkII retains all of the primary functions of the original ISA428. You get four hand-wound transformer-based preamps built around the original ISA 110 preamp circuit, housed in a convenient 2U chassis. Each of these incredible preamps features switchable impedance and an impressive 122dB of dynamic range, and each provides you with Focusrite's highly sought-after warm and transparent sound. You also get the same fantastic DI circuits found on the original ISA428, a favorite of many engineers for the bite they give electric bass. And by omitting the bulky VU meters and soft limiters, and retaining the precise LED metering of the original ISA428, Focusrite reduced the environmental footprint of the ISA428 MkII. They've also uncluttered its face and reduced its cost, all without impacting its performance. An optional A/D conversion card gives you up to eight channels of conversion over ADAT lightpipe, so the ISA428 MkII is as easy to integrate into your DAW as ever.
The ISA428 MKII features four of Focusrite's classic ISA transformer-balanced preamps in a single robust 2U chassis. The four preamps feature the same vintage preamplifier design as the original ISA110 module from Focusrite’s critically acclaimed Forte console (including the original Lundahl L1538 transformer). If you've been wanting to get the signature Focusrite sound for your studio, the ISA428 MKII is an ideal way to achieve it — at a remarkably low per-channel cost!
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.
ISA series mic preamps have been the producers' choice on countless hit records over the last two decades.
Four additional A-D converter inputs allow eight channels of high quality conversion, with a dynamic range of 122dB and jitter performance below 250 picosecondse
Ideal for mic matching or extended microphone creativity. Settings include the 'Vintage ISA110' setting, providing the original focusrite signature sound.
Instant access on the front fascia - no separate DI box required.
Switchable insert points are featured on every channel, allowing routing (between preamp and output) through additional external processing.
Clear metering designed to catch even the fastest and most elusive of transients.
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. Each mic pre has the option of mic, line or the front-panel instrument input, with variable input impedance to ensure you are getting the best performance from the source. Up to 60dB of gain is available on the four-position rotary and gain range switches, with a further +20dB of continuously variable trim, meaning a huge 80dB of gain is available should it be required. The high-pass filter features variable cut-off frequency between 16 and 420Hz. An array of 6-segment LED meters show peak signal level for the four mic pres, in addition to the four direct inputs to the optional A-D card. Switchable rear-panel insert points allow the use of inline processors such as compressione
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.
All Focusrite products are built to the highest standards, and are designed to provide many years of reliable performance.
| Preamp Type | Solid State |
|---|---|
| Number of Channels | 4 |
| Phantom Power | Yes |
| EQ |
Highpass Filter (75Hz, 18dB/Octave, Switchable per Channel) |
| Phantom Power | Yes |
| Sample Rate |
Up to 192kHz |
| Bit Depth |
Up to 24-bit |
| Analog Inputs | 4 x XLR (Mic), 4 x 1/4" (Line), 4 x 1/4" (Hi-Z), 4 x 1/4" (Returns), 4 x XLR (Aux) |
| Analog Outputs | 4 x XLR, 4 x 1/4" (Sends) |
|
Digital Outputs |
Optional A/D expansion card available (digital DB25, optical) |
|
Frequency Response |
20Hz-122kHz (±0.1dB) |
| Rack Spaces | 2U |
| Power Supply | Standard IEC AC cable |
| Width |
19" |
| Height |
3.5" |
| Depth | 11" |
| Weight | 12.2 lbs. |
| Manufacturer Part Number | AMS-ISA-428-MKII 815301005124 |
