Focusrite ISA 828 Mk II

Focusrite ISA 828 Mk II

ISA 828 Mk II features eight classic ISA mic preamps with Lundahl LL1538 input transformers on every channel. With up to 80 dB of gain, selectable impedance including the classic ISA110 setting, and professional rack integration, it delivers unmistakable large-format studio tone.

✅ 8 × ISA transformer-based mic preamps (Lundahl LL1538)
✅ Selectable impedance: 600Ω / 1400Ω (ISA110) / 2400Ω / 6800Ω
✅ Up to 80 dB gain (60 dB + 20 dB trim)
✅ 4 × Front-panel instrument inputs (High 2.4 MΩ / Low 470 kΩ)
✅ Fixed 75 Hz High-Pass Filter (18 dB/oct)
✅ Switchable insert points (DB-25 AES59)
✅ Six-segment LED meters per channel
✅ Updated switching power supply (cooler, more efficient)
✅ Optional ISA ADN8 A-D card (Dante, ADAT, AES3 up to 24-bit/192 kHz)

Mic Inputs:
Gain: 0–60 dB (stepped) + 0–20 dB trim
EIN: -123 dBu (A-weighted)
SNR: 122 dB (A-weighted)
THD+N: 0.0028%
+48V phantom power per channel
Phase reverse available

Line Inputs:
Gain: -20 dB to +10 dB + trim
Max Input Level: +25 dBu

Connectivity:
• 8 × XLR mic inputs
• 8 × 6.3 mm line inputs
• 1 × DB-25 output (AES59)
• 1 × DB-25 insert connector
• IEC power input

Form Factor: 2U / 19” rack

In the box:
– ISA 828 Mk II unit

Tags: Focusrite ISA 828 Mk II, ISA 828 Mk II, Microphone preamplifiers