Updated 15 May 2026
| Brand | Focusrite |
| Category | Musical Instruments |
| Available at | 1 UK stores |
| 90-day avg | £2991.00 |
Focusrite
Focusrite ISA828 Mk II 8 Channel Pre-Amp
£2990.00Fair Price
Cheapest at Gear4music · 1 store
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PRICE HISTORY
Current
£2728
Change
+8.2%
Avg
£2710
Low
£2490
High
£2879
Volatility
3.4%
PRODUCT DESCRIPTION
- Classic ISA mic preamp design The Focusrite ISA828 Mk II is equipped with eight high-quality microphone preamps each featuring the iconic Lundahl LL1538 input transformer. This renowned design ensures exceptional audio performance providing a unique character to the sound that cannot be replicated in any other way. The variable input impedance allows for added flexibility offering a range of sonic options when using different microphones. With the option to switch to the ISA 110 setting you can replicate the impedance of the original Focusrite mic pre further enhancing your recordings. Up to 80dB gain with precision trim control With the ISA828 Mk II you have an impressive amount of gain at your fingertips. Each mic preamp offers up to 60dB of gain and an additional +20dB of continuously variable trim giving you a total gain range of 80dB. This allows you to capture even the most quiet or delicate sound sources with clarity and precision. Whether its a soft-spoken vocalist or a subtle acoustic guitar the ISA828 Mk II ensures you never miss a detail. Vintage-style high-pass filter The ISA828 Mk II features a high-pass filter with a fixed frequency of 75Hz and an 18dB/octave roll-off. This handy feature minimizes unwanted low-frequency rumble stand-borne noise and other low-frequency sounds ensuring your recordings sound clean and professional. By effectively eliminating these unwanted frequencies you can focus on capturing the true essence of your source material without any unwanted artifacts. Switchable insert points for flexible connectivity For added convenience and flexibility the ISA828 Mk II offers switchable rear-panel insert points. This allows you to use inline processors such as compressors or EQs directly with the preamp. By integrating your favorite outboard gear into your signal chain you can shape and enhance your recordings with precision. This feature is particularly valuable for professional studio setups where precise signal routing and processing control are essential. Features: 8 x ISA Transformer Based Preamps 25 Pin D-type Connectors (for connection to ProTools HD) Switchable Impedance 4 x Direct Instrument Inputs Inserts Available On All Channels High Pass Filter Phase Reverse and Phantom Power 6 x LED Input Meter Specifications Mic Inputs Gain Range: 0dB to +30dB (30-60 switch disabled) and +30dB to +60dB (30-60 switch enabled) in 10dB steps with an additional +20dB of continuous trim Input Impedance: Low = 600? ISA 110 = 1400? Med (Medium) = 2400? High = 6800? Max. Input Level: +7dBu min gain medium Z Frequency Response (20Hz - 20kHz): 20Hz - 20kHz 0.2dB min gain medium Z THD + N: -91dB (0.0028 ) @ -1dBr min gain medium Z EIN: -123dBu A-Weighted (typical) Signal-To-Noise Ratio: 122dB A-Weighted (typical) medium Z Line Inputs Gain Range: 20dB to +10dB in 10dB steps with an additional +20dB of continuous trim Input Impedance: Low = 600? ISA 110 = 1400? Med (Medium) = 2400? High = 6800? Max. Input Level: +25dBu min gain low Z Frequency Response (20Hz - 20kHz): 20Hz - 20kHz 0.1dB min gain low Z THD + N: -91dB (0.0028 ) @ -1dBr min gain low Z Signal-To-Noise Ratio: 122dB A-Weighted (typical) min gain low Z Instrument Inputs Gain Range: +10dB to +40dB with continuous gain using trim pot Front Panel Connectivity Channel Count: 2 Channels In Instrument Inputs: 4 x 1/4" jack inputs Rear Panel Connectivity Mic Inputs: Input: 8 x Female XLR Line level: Channel Count: 8 In and 8 Out Input: 8 x 1/4" jack inputs Output: 1 x DB-25 connectors (AES59) Inserts: Channel Count: 8 In Input: 1 x DB-25 connectors (AES59) Digital Card Slot Compatible Card: ISA ADN8 Front Panel Indicators Control Functions: 16 x Pots (Gain and Trim). 60 Switches (On/Off Switch 30-60 Gain +48V Phase HPF Insert Z In Input Meters Pre A-D Clock Select and Ext. Word Clock) Rear Panel Indicators Control Functions: 1 x Pot (Meter Trim) Height: 3.5" Depth: 12" Width: 19" Weight: 8.84Kg Product Code: MOIF828MK2-UK