Average Reviews:
(More customer reviews)Very versatile preamps! I've had them for 3 years and wouldn't dream of getting rid of them! Very clean, but colorful (in a good way). I've used them on everything from drums to voice to symphony to bass & keyboards (direct). No complaints. I've done shootouts with preamps that were much more expensive and I won't say the ISA428 blew them away, but it came closer than it should have considering the price difference!
Click Here to see more reviews about: Focusrite ISA428 Four Classic Microphone Pre-Amps and High-Quality A/D Conversion
The ISA 428 features four classic, transformer-based microphone pre amps with switchable impedance and direct Instrument Inputs are combined with an optional eight channel 192kHz ADC. An all-new, Soft Limiter circuit precedes the A/D, providing the perfect path into any DAW, Digital Console or direct to Hard Disc Recorder. The input stage provides enhanced control and creativity allowing you to switch between four carefully selected input impedance settings. The original ISA 110 setting is supplemented by three further impedance settings to either perfectly match the pre-amp with any microphone and maximise level, or to use different settings creatively to shape the sound of the microphone being used. Should the need arise to place extra processing between pre-amp and conversion, insert points are also featured on every channel. Protecting the ADC, Focusrite's Soft Limiter is a new optical circuit design, entirely preventing any digital overs, whilst reducing to an absolute minimum the undesirable distortion artefacts that common limiter circuits typically generate. This limiter requires the optional ADC to be fitted in order for it to operate.The ADC embodies cutting-edge conversion technology, encompassed within Focusrite circuitry, providing eight high quality conversion channels, at sampling frequency rates of 44.1, 48, 96 and 192kHz. Running at 96kHz allows for up to 16 (2 x 8, parallel) digital outputs. Digital output formats are dual 9-pin D-sub (AES/EBU, SPDIF) and dual ADAT light-pipe. Full digital metering is provided for every channel, alongside moving coil peak meters, designed to catch even the fastest transients. A second ISA428 analogue unit can be connected utilising the four extra ADC input channels on the rear of the unit containing the optional ADC. This makes full use of the eight channels provided and expands front-end capacity from four pre amps and eight digital outputs to eight Pre amps and eight digital outputs.
