{"product_id":"audio-amplifiers-with-tube-preamp-building-simple-circuits-yourself-9798711423324","title":"Audio Amplifiers with Tube Preamp: Building Simple Circuits Yourself","description":"Amplifiers equipped entirely with tubes require a great deal of circuitry and mechanical effort. A conceptually and technically interesting compromise is the combination of a tube preamplifier with a transistorized or integrated power amplifier. This approach, which has also been implemented in quite a few commercial devices, is the focus of this book. The described tube preamplifiers can of course easily be combined with other amplifiers.\u003cbr\u003e","brand":"Independently Published","offers":[{"title":"Default Title","offer_id":50448171401490,"sku":"9798711423324","price":19.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0831\/4771\/8930\/files\/img_3c2fc84f-f1d4-406b-acf7-3bbaaa5ec413.jpg?v=1729727841","url":"https:\/\/surprise-castle.myshopify.com\/products\/audio-amplifiers-with-tube-preamp-building-simple-circuits-yourself-9798711423324","provider":"Surprise Castle","version":"1.0","type":"link"}