{"product_id":"locomotive-audio-model-86b-1","title":"Locomotive Audio Model 86B-1","description":"\u003cdiv lang=\"en\"\u003e\n\u003cp\u003e\u003cstrong\u003eLocomotive Audio Model 86B-1\u003c\/strong\u003e is a single-channel version of the 86B-2 circuit in a 500-series module, built on the same modernized Ampex 601 tape-recorder preamp philosophy. Unlike its two-channel sibling, its input stage runs a 6BR7 tube instead of an EF86, paired with the same 12AY7 output tube and the same 75dB maximum gain. It's the single-channel counterpart to the two-channel 86B-2, built for a 500-series slot instead of its own rack chassis.\u003c\/p\u003e\n\u003ch3\u003eSame family, different input tube\u003c\/h3\u003e\n\u003cp\u003eThe 6BR7 and the EF86 are functionally similar remote-cutoff pentodes, but they're different tube types, so the 86B-1 isn't a literal copy of one 86B-2 channel, it's a separate take on the same Ampex 601\/286A lineage, adapted to the 500-series format. MuMetal-shielded input transformers and nickel-and-steel output transformers, both wound in-house, stay common across Locomotive's whole preamp family.\u003c\/p\u003e\n\u003ch3\u003eFull control in a single 500-series slot\u003c\/h3\u003e\n\u003cp\u003eA two-knob gain\/level layout, a -20dB pad, an 85Hz high-pass filter, switchable mic input impedance, a high-impedance front-panel DI input, 48V phantom power with a polarity switch, and a 3-colour LED meter pack the full feature set of a larger rackmount preamp into one 500-series module. The 500-series format packs the same level of control as the larger 86B-2 into a single rack slot, saving space where channel density per rack unit matters most.\u003c\/p\u003e\n\u003ch3\u003eKEY FEATURES\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSingle-channel tube preamp in 500-series format\u003c\/li\u003e\n\u003cli\u003e6BR7 input tube, 12AY7 output tube\u003c\/li\u003e\n\u003cli\u003eSame design lineage as the 86B-2, different format and input tube\u003c\/li\u003e\n\u003cli\u003eSwitchable mic input impedance\u003c\/li\u003e\n\u003cli\u003e-20dB pad and 85Hz high-pass filter\u003c\/li\u003e\n\u003cli\u003eHigh-impedance front-panel DI input\u003c\/li\u003e\n\u003cli\u003e48V phantom power with polarity switch\u003c\/li\u003e\n\u003cli\u003e3-colour LED output meter\u003c\/li\u003e\n\u003cli\u003eHand-built in the USA\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTECHNICAL SPECIFICATIONS\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eType: single-channel tube preamp, 500-series\u003c\/li\u003e\n\u003cli\u003eTubes: 6BR7 (input), 12AY7 (output)\u003c\/li\u003e\n\u003cli\u003eMaximum gain: 75dB\u003c\/li\u003e\n\u003cli\u003eTransformers: MuMetal input, nickel-and-steel output, in-house wound\u003c\/li\u003e\n\u003cli\u003ePad: -20dB\u003c\/li\u003e\n\u003cli\u003eHigh-pass filter: 85Hz\u003c\/li\u003e\n\u003cli\u003ePower: 48V phantom\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Locomotive Audio","offers":[{"title":"Default Title","offer_id":54961112056145,"sku":"61012","price":1192.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0729\/8741\/0769\/files\/Locomotive_Audio_Model_86B-1_1.jpg?v=1789721102","url":"https:\/\/wrdtunes.com\/es\/products\/locomotive-audio-model-86b-1","provider":"Wired Tunes","version":"1.0","type":"link"}