{"product_id":"ca-undertone-audio-mpdi-4-0efb8e869f","title":"UNDERTONE AUDIO MPDI-4 — Microphone","description":"\u003cp\u003eUndertone Audio MPDI-4 is a four-channel microphone preamp and DI in a single 1RU chassis. The manufacturer lists four independent mic preamp\/DI circuits with front-panel XLR\/1\/4-inch combo inputs, mic-pre direct XLR outputs, +48 V phantom power, phase reverse, a switchable -20 dB input pad and -10 dB output pad. Gain is stepped from -10 to -60 dB in 5 dB increments, and each channel includes a switchable 600 ohm output load plus a low-impedance mode intended for passive ribbon microphones. The design includes bypassable input and output transformers and adjustable THD\/headroom behavior, allowing clean or more harmonic operation depending on settings. Retailer corroboration lists the product as a 19-inch 1U rackmount and gives MFR# MPDI-4. Accessible pages did not publish a GTIN, exact dimensions beyond 1U rack format, or verified unit weight.\u003c\/p\u003e","brand":"UNDERTONE AUDIO","offers":[{"title":"Default Title","offer_id":51242202988790,"sku":null,"price":5645.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/2882\/7894\/files\/14350_full.jpg?v=1783727472","url":"https:\/\/envoy-music.myshopify.com\/products\/ca-undertone-audio-mpdi-4-0efb8e869f","provider":"Envoy Music","version":"1.0","type":"link"}