{"product_id":"rca-77-b1-ribbon-microphone-1651-vintage","title":"RCA 77-B1 Ribbon Microphone #1651 (Vintage)","description":"\u003cp\u003eVintage broadcast microphone in custom \"Japan Black\" paint. \u003cbr\u003e\u003cbr\u003eThe \u003cstrong\u003eRCA 77-B1 \u003c\/strong\u003eis a classic ribbon microphone. Great on horns, guitars, vocals. Rich lows, silky smooth mids and highs. A must have for every mic locker - from RCA, the inventors of the ribbon mic.\u003cbr\u003e \u003c\/p\u003e\u003ch3\u003eHistory\u003c\/h3\u003e\u003cp\u003eA ribbon mic works by suspending a thin piece of corrugated aluminum, (the 'ribbon'), between two poles of an Alnico magnet. The compression and rarefaction of air vibrates this ribbon in the magnetic field, which creates voltage changes that are run through an output transformer to the external amplifier of your choice. Like a dynamic mic, a ribbon requires no tubes, batteries or power supply of any kind. In the case of the \u003cstrong\u003eRCA 77-B1\u003c\/strong\u003e, the chassis is built to absorb mechanical shocks, the output transformer is shielded against magnetic fields, and the capsule is resistant to changes in humidity and temperature.\u003cbr\u003e\u003cbr\u003eThe 77-B1 is a high-fidelity ribbon mic that was originally designed for broadcast studio use. The 77-B1 was released in 1937, after a very short run of the model 77B, as the successor to the much larger 77-A. It was advertised as a unidirectional mic - its cardioid pattern effectively eliminated sound from the sides, and especially the rear of the microphone. One half of the ribbon acts as a velocity type mic, while the other half acts as a pressure type. The frequency response is from 40 Hz to 10 kHz, with an output impedance of either 50 or 250 Ohms.\u003cbr\u003e\u003cbr\u003eThe RCA 77 series, which resembles a large pill of the capsule variety, has become THE iconic shape of a microphone, and remains so over 40 years after it was discontinued in 1967.\u003c\/p\u003e","brand":"RCA","offers":[{"title":"Default Title","offer_id":44451004612711,"sku":"182440","price":2195.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0658\/8848\/5479\/files\/rca-77-b1-ribbon-microphone-1651-vintage_182440_1_5e3e43ca-a645-4340-bf4e-15a17acd1f7b.jpg?v=1787095455","url":"https:\/\/vintageking.mom\/products\/rca-77-b1-ribbon-microphone-1651-vintage","provider":"Vintage King","version":"1.0","type":"link"}