Focusrite ISA 828 MkII 8-Channel Rack-Mount Transformer-Based Microphone Preamplifier<
Focusrite | SKU: FOCUSRT-ISA828MKII-AMSISA828MKII
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Most orders placed before 10:00am PST will most likely ship out the same day. We work hard to process and ship your items quickly so you can start enjoying them as soon as possible.
Found a lower price? Contact us and we'll see if we can match it! Price match will only be applied to products sold and shipped by authorized retailers of the brand.
No restocking fee will be charged when you opt for store credit. Exclusions apply.
Condition: New
AMS-ISA-828-MKII
Focusrite ISA 828 MkII 8-Channel Rack-Mount Transformer-Based Microphone Preamplifier
The Focusrite ISA 828 MkII houses eight iconic transformer-based ISA 110-derived mic preamps in a compact 2U rack unit. Equipped with Lundahl LL1538 input transformers, variable impedance, front-panel instrument inputs, high-pass filters, optional digital expansion, and robust metering, this preamp delivers legendary tone with modern flexibility.
Key Features
- Iso Preamp Design: 8x classic ISA mic preamps with Lundahl LL1538 transformers
- Inputs: Mic/line inputs on all channels; front-panel instrument inputs on channels 1–4 with high/low impedance
- Gain: Up to 60 dB stepped + 20 dB trim (80 dB total) for mic gain; line gain –20 dB to +10 dB + 20 dB trim
- High-Pass Filter: Fixed 75 Hz, 18 dB/octave, per channel
- Metering: Per-channel six-segment LED meters with rear-panel calibration
- Input Impedance: Variable mic impedance—Low (600 Ω), ISA 110 (1.4 kΩ), Medium (2.4 kΩ), High (6.8 kΩ); instrument inputs switch between Low (470 kΩ) and High (2.4 MΩ)
- Insert Points: Switchable rear-panel inserts when used with optional AD card
- Optional A-D Expansion: Supports ISA ADN8 card for Dante, ADAT, AES3 outputs at up to 24-bit/192 kHz
- Power: Internal universal PSU (100–240 VAC), efficient switching design
- Reliability: Updated PSU generates less heat, higher reliability; 3-year warranty
Technical Specifications
- Dimensions: W 482 mm (18.98") x H 88 mm (3.46") x D 325 mm (12.80")
- Weight: 7.05 kg (15.55 lb) – 7.48 kg (16.49 lb) with accessories
- Gain Range (Mic): 0–60 dB stepped + 0–20 dB trim (80 dB total)
- High-Pass Filter: 75 Hz, 18 dB/oct, per channel
- Input Impedance Settings: Mic: 600 Ω / 1.4 kΩ / 2.4 kΩ / 6.8 kΩ; Instrument: 470 kΩ / 2.4 MΩ
- Metering: 6-segment LED, dBFS, rear-trim calibrated
- Power Consumption: 35 W
- Rack Space Required: 2U, with 75 mm rear clearance
- Max Env. Temp: 40 °C (104 °F)
What's Included
- 1x ISA 828 MkII unit
- 1x IEC mains power cable
- 1x Safety cut sheet / quick info
- 3-year Focusrite warranty
- Optional: ISA ADN8 A-D expansion card (sold separately)
