Focusrite Pro ISA828
8 Channel Mic Preamp with 4 DI Inputs & Switchable Impedance
Eight transformer-based preamps with Focusrite heritage.
The ISA828 from Focusrite gives you eight transformer-based ISA mic preamps in 2U of rack space. The ISA 828 is based on the original ISA110 module from the Focusrite Forté console. This console was commissioned by Sir George Martin and designed by Rupert Neve. The ISA series of preamps have a heritage. The ISA828 is a descendant of this original design, and features eight Lundahl Input transformers.
The ISA 828 also includes 8 line inputs, these are switchable per channel on the front of the channel. The microphone inputs are via XLR, the line inputs via TRS jacks, and the Line outputs are on a DB25 connector. This offers simple connectivity to audio interfaces that also use the DB25 standard. There are breakout looms available to XLR and TRS if you need those connections instead.
The Mic, Line and Instrument modes of the ISA 828 offer you a selectable input impedance. This includes the original ISA110 setting, in addition to 3 other settings, offering you 4 different tones for your input - instantly. In Mic mode, you have up to 80dB of gain. The 30-60 button switches in the additional mic gain range, and the trim knob on each channel allows you to add up to an additional 20dB. Each channel has a high pass filter switch, that adds a 18dc per octave high pass filter at 75Hz.This is great for eliminating low rumble on your tracks before they get to "tape".
The first four channels of the ISA828 features 1/4" Jack direct inputs. Plug your guitar, bass, synth or any other instrument into these. In Inst mode, you have the choice of a Low or High impedance setting.
Each channel of the ISA828 features a six-LED input meter. On the rear of the unit is a global meter trim for adjusting the range of these LEDs. AT the default setting the metering is designed to follow a -18dBu reference.
Optional AD Converter Card
Focusrite also offer an 8-channel 192kHz converter card for the ISA828. This gives you ability to convert your signals to digital and connect them to your audio interface via ADAT/SMUX or AES/SPDIF via a breakout loom.