{"product_id":"focusrite-isa828-mkii-b1","title":"Focusrite ISA 828 MkII 8-Channel Transformer Mic Preamp (Warehouse Deal, Minor marks)","description":"\u003cp\u003eThe Focusrite ISA 828 MkII is an eight-channel transformer-based mic preamp in a 2U rackmount chassis, featuring eight ISA preamp circuits with Lundahl LL1538 input transformers and a rear-panel expansion slot for the optional ISA ADN8 A-D converter card.\u003c\/p\u003e\n\n\u003ch3\u003ePreamp Controls\u003c\/h3\u003e\n\u003cp\u003eEach of the eight channels offers up to 80dB of gain (60dB in 10dB steps, plus 20dB of variable trim) with four-position input impedance switching (600Ω, 1.4kΩ ISA 110, 2.4kΩ, 6.8kΩ). Channels 1 through 4 include front-panel instrument inputs for direct recording of guitars and basses. A 75Hz high-pass filter (18dB\/octave) is independently switchable per channel. Rear-panel insert points on every channel allow external processing.\u003c\/p\u003e\n\n\u003ch3\u003eOutputs and Digital Expansion\u003c\/h3\u003e\n\u003cp\u003eAnalogue outputs are provided on a DB-25 connector (AES59 Tascam Analogue pinout). A second rear-panel DB-25 provides eight additional A-D inputs when the optional ISA ADN8 card is installed, enabling up to 16 channels of A-D conversion from a single unit with Dante, AES3, and ADAT connectivity.\u003c\/p\u003e\n\n\u003ch3\u003eConnectivity\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e8 x XLR mic inputs (rear panel)\u003c\/li\u003e\n\u003cli\u003e8 x 1\/4\" TRS line inputs (rear panel)\u003c\/li\u003e\n\u003cli\u003e4 x 1\/4\" TS instrument inputs (front panel, channels 1-4)\u003c\/li\u003e\n\u003cli\u003e8 x balanced analogue outputs (DB-25, AES59 pinout)\u003c\/li\u003e\n\u003cli\u003e8 x A-D inputs (DB-25, active with optional ADN8 card)\u003c\/li\u003e\n\u003cli\u003eSwitchable insert points per channel\u003c\/li\u003e\n\u003cli\u003eOptional ISA ADN8 digital card slot\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eMic gain range: 0 to 60dB (10dB steps) + 20dB trim\u003c\/li\u003e\n\u003cli\u003eMic input impedance: 600Ω, 1.4kΩ (ISA 110), 2.4kΩ, 6.8kΩ\u003c\/li\u003e\n\u003cli\u003eMic EIN: \u0026lt;-123dBu (A-weighted)\u003c\/li\u003e\n\u003cli\u003eSignal-to-noise ratio: 122dB (A-weighted)\u003c\/li\u003e\n\u003cli\u003eFrequency response: 20Hz to 20kHz +\/-0.2dB\u003c\/li\u003e\n\u003cli\u003eHigh-pass filter: 75Hz, 18dB\/octave, switchable per channel\u003c\/li\u003e\n\u003cli\u003ePhantom power: +48V, independently switchable per channel\u003c\/li\u003e\n\u003cli\u003eForm factor: 2U rackmount\u003c\/li\u003e\n\u003cli\u003ePower: Internal PSU, 100-240V AC\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Focusrite","offers":[{"title":"Default Title","offer_id":50525564502265,"sku":"ISA828-MKII-b1","price":4499.1,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0746\/5766\/1177\/files\/ISA828-MKII_79eea154-cc02-46a9-a4e8-7d933ca92441.jpg?v=1765321257","url":"https:\/\/blackoutaudio.com\/products\/focusrite-isa828-mkii-b1","provider":"Blackout Audio","version":"1.0","type":"link"}