{"product_id":"burl-audio-b80-b4","title":"Burl Audio B80-B4","description":"\u003cdiv lang=\"en\"\u003e\n\u003cstrong\u003eBurl Audio B80-B4\u003c\/strong\u003e – four-channel mic\/line preamp card with A\/D conversion for the B80 Mothership chassis.\n\nThe card uses a new BX6 input transformer, designed to provide correct impedance for both microphone and line-level sources, paired with a fully discrete Class-A analog path built around the BOPA14 chip - the same one used in the BAD8 card. The signal reaches the same analog-to-digital converter as the BAD8, keeping tonal consistency between mic channels and the conversion path of the rest of the system. A fully balanced signal path keeps self-noise low even at the high gain quieter microphone sources require.\n\n\u003ch3\u003eTrue mic and line input impedance on one card\u003c\/h3\u003e\nThe BX6 transformer selects the correct input impedance depending on the operating mode - 2.5k ohms for mic inputs and 10k ohms for line inputs - removing the need for separate cards or external preamps when switching between sources at different signal levels within the same session. A gain range up to 59 dB properly handles both quiet ribbon microphones and hot line-level sources without adding an external gain stage.\n\n\u003ch3\u003eUp to 40 mic channels from a single chassis\u003c\/h3\u003e\nA single B80 chassis filled with B4 cards provides up to 40 audiophile-grade mic\/line inputs, letting you build a complete preamp bank for a large tracking session without spreading gear across multiple separate rack units. Paired with a Dante or SoundGrid digital motherboard, a B80 configured this way works as a fully digital, studio-quality stage box, useful both in the studio and for live sound work.\n\n\u003ch3\u003eKEY FEATURES\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e4-channel mic\/line preamp card with XLR connectivity\u003c\/li\u003e\n\u003cli\u003eNew BX6 input transformer with correct mic and line impedance\u003c\/li\u003e\n\u003cli\u003eFully discrete Class-A analog path (BOPA14)\u003c\/li\u003e\n\u003cli\u003eUp to 40 mic\/line channels in a single B80 chassis\u003c\/li\u003e\n\u003cli\u003eAvid delay matching and a switchable ADC filter\u003c\/li\u003e\n\u003cli\u003eFully balanced signal path for low self-noise\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTECHNICAL SPECIFICATIONS\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eCard type: 4-channel mic\/line preamp with ADC\u003c\/li\u003e\n\u003cli\u003eInput impedance: mic 2.5k ohms, line 10k ohms\u003c\/li\u003e\n\u003cli\u003eGain range: up to 59 dB\u003c\/li\u003e\n\u003cli\u003eFrequency response (0 dB, line level): -0.03 dB at 10 Hz, -1.5 dB at 30 kHz\u003c\/li\u003e\n\u003cli\u003eFrequency response (59 dB, full gain): -0.03 dB at 10 Hz, -2.5 dB at 30 kHz\u003c\/li\u003e\n\u003cli\u003eAnalog path: discrete, Class-A, BX6 transformer\u003c\/li\u003e\n\u003cli\u003eInput connectors: 4 x XLR\u003c\/li\u003e\n\u003cli\u003eMaximum channels per B80 chassis: 40 (10 cards x 4 channels)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Burl Audio","offers":[{"title":"Default Title","offer_id":54240301908305,"sku":"21896","price":0.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0729\/8741\/0769\/files\/BurlAudioB80-B41.jpg?v=1783854884","url":"https:\/\/wrdtunes.com\/fr-fr\/products\/burl-audio-b80-b4","provider":"Wired Tunes","version":"1.0","type":"link"}