Focusrite ISA 428 MkII Four Channel Mic Preamp
The ISA428 MkII provides four of Focusrite's prestigious transformer-based microphone preamps. It features the same classic circuitry and renowned audio quality found in the original at a new level of affordability. With selectable input impedance, direct instrument inputs and an optional eight channels of high-quality analogue to digital conversion, the ISA428 MkII creates the perfect front end for the discerning recording professional.
First introduced in 1985, the ISA microphone preamp holds a reputation for outstanding transparency along with subtle warmth contributed by transformer core saturation. The addition of a variable impedance circuit allows ISA users to perfectly match the preamp with any microphone, or to use different settings creatively to shape the sound of the microphone. Unchanged for decades, the ISA microphone preamp topology offers incredible clarity and the signature Focusrite sound that makes it the top choice among many audio professionals today.
The optional class-leading eight-channel A-D converter option used with the ISA828 is also compatible with the ISA428 MkII. Along with the four mic preamp inputs, four additional inputs allow you to route other line signals through the converter.
Four instrument inputs, instantly accessible on the front panel, allow quick and easy connection without the need for a separate DI box. Extra processing can be placed between preamp and conversion via the units dedicated insert points, featured on every channel. Finally, accurate six-segment LED metering is designed to catch even the fastest transients on every channel.
Over 25 years, Focusrite has earned a reputation for bringing superb audio quality and engineering excellence to an array of audio professionals. Whether you're looking to preserve the sound of your classic microphones, or searching for the perfect front end for your digital studio, the ISA428 MkII brings legendary tools to your studio at an exceptional new price.
| SKU | FOC-ISA428MKII |
| Vendor | Focusrite |
| Bus Power | No |
| Included From Manufacturer | Power Cable |
| Mic Preamps | 4 |
| MPN | ISA428MKII |
| Product Unique Features | Optional 8 channel A-D converter available |
| ADAT Expandable | No |
| Number of Channels | 4 |
| Audio Inputs | 4 XLR Mic Inputs, 4 TRS Line Inputs, 4 1/4" Instrument Inputs |
| Audio Outputs | XLR Audio Outputs |
| Phantom Power | 48V |
| Product Weight | 15 lbs |
| Rackmountable | Yes |
| Width | 19" |
| Depth | 11" |
| Height | 3.5" |
Focusrite Limited Warranty
All Focusrite products are built to the highest standards and should provide reliable performance for many years, subject to reasonable care, use, transportation and storage.
Many of the products returned under warranty are found not to exhibit any fault at all. To avoid unnecessary inconvenience to you in terms of retuning the product please contact Focusrite support.
In the event of a Manufacturing Defect becoming evident during the warranty period, Focusrite will ensure that the product is repaired or replaced free of charge. The warranty period for any product purchased on or after January 24th, 2020 is a period of 36 months from the date of the original purchase.
A Manufacturing Defect is defined as a defect in the performance of the product as described and published by Focusrite. A Manufacturing Defect does not include damage caused by post-purchase transportation, storage or careless handling, nor damage caused by misuse.
While this warranty is provided by Focusrite, the warranty obligations are fulfilled by the distributor responsible for the country in which you purchased the product.
The distributor will advise you of the appropriate procedure for resolving the warranty issue. In every case it will be necessary to provide a copy of the original invoice or store receipt to the distributor. In the event that you are unable to provide proof of purchase directly then you should contact the reseller from whom you purchased the product and attempt to obtain proof of purchase from them.
Please note that if you purchase a Focusrite product outside your country of residence or business you will not be entitled to ask your local Focusrite distributor to honor this limited warranty, although you may request an out-of-warranty chargeable repair.
This limited warranty is offered solely to products purchased from an Authorized Focusrite Reseller (defined as a reseller which has purchased the product directly from Focusrite Audio Engineering Limited in the UK, or one of its Authorized Distributors outside the UK). This warranty is in addition to your statutory rights in the country of purchase.
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