MIC PREAMP The ISA 828 MkII shares the simple mic preamp design of the original Focusrite ISA 110 module from the Focusrite Studio Console and integrates eight of Focusrite's classic mic preamps with Lundahl LL1538 transformers on each input. Each channel has a choice of mic or line inputs, while inputs 1 to 4 also feature front panel instrument inputs. Each mic has variable input impedance to provide a range of subtly different sonic options including an 'ISA 110' setting, which replicates the impedance of the original Focusrite mic preamp.

Up to 60dB of gain is available, with an additional +20dB continuously variable trim, giving a whopping 80dB of gain range. The high-pass filter has a variable cutoff frequency that goes from 16 to 420Hz. The ISA 828 MkII features channel-by-channel calibratable high-pass filters, six-segment LED meters, and selectable insert points on the rear panel, which allow the use of in-line processors such as compressors or equalizers.

Dedicated connectors for mic and line level inputs allow all sources to be connected simultaneously, making the ISA 828 MkII perfect for permanent rack installation. An innovation of the ISA 828 MkII is an updated power supply that allows for more efficient power consumption, reduced heat generation, and extremely reliable operation. The ADN8 ISA analog-to-digital expansion option card provides eight Dante, ADAT and AES3 outputs at speeds up to 24-bit 192kHz.

Main features:

-Optional AD card with up to 24-bit sampling, at 192kHz, offering precise, high-quality digital audio conversion to Dante, ADAT and AES3

-Classic ISA mic preamp design with Lundahl LL1538 input transformer

-Selectable power supply design allows for cool and efficient operation

-Front panel instrument inputs for the first four channels

-Line inputs with dedicated input connectors and a switch on the front panel

-Selectable input impedance including classic ISA 110 tuning

-High-pass filters

-Selectable insert points when used with AD card

-6-segment LED peak level meters, calibratable per channel