{"product_id":"grunow-1191-vintage-tube-amplifier-push-pull-hi-fi-audio-free-shipping","title":"Grunow 1191 Vintage Tube Amplifier | Push-Pull Hi-Fi Audio - Free Shipping","description":"\u003ch2 data-start=\"275\" data-end=\"325\"\u003eGrunow 1191 Vintage Tube Amplifier with 12\" Speaker\u003c\/h2\u003e\n\u003ch3 data-start=\"0\" data-end=\"42\"\u003e🎶 Vintage Power Meets Audiophile Soul\u003c\/h3\u003e\n\u003cp data-start=\"44\" data-end=\"125\"\u003e\u003cstrong data-start=\"44\" data-end=\"125\"\u003eGrunow 1191 High-Fidelity Push-Pull Tube Amplifier with Turntable Integration\u003c\/strong\u003e\u003c\/p\u003e\n\u003chr data-start=\"127\" data-end=\"130\"\u003e\n\u003ch3 data-start=\"132\" data-end=\"191\"\u003e🌀 Classic High-Fidelity Design with Rich Tube Warmth\u003c\/h3\u003e\n\u003cp data-start=\"192\" data-end=\"628\"\u003eRediscover the golden era of sound with the \u003cstrong data-start=\"236\" data-end=\"275\"\u003eGrunow 1191 vintage audio amplifier\u003c\/strong\u003e—a stunning example of 1930s audio engineering. Featuring a \u003cstrong data-start=\"335\" data-end=\"371\"\u003epush-pull 6F6 tube configuration\u003c\/strong\u003e, this amplifier delivers rich, full-bodied audio that defined the early high-fidelity movement. Designed with \u003cstrong data-start=\"482\" data-end=\"508\"\u003eClass AB amplification\u003c\/strong\u003e, it ensures crisp clarity at every volume level, whether you're spinning soft jazz or powerful orchestral arrangements.\u003c\/p\u003e\n\u003cp data-start=\"630\" data-end=\"932\"\u003eWith \u003cstrong data-start=\"635\" data-end=\"647\"\u003e11 tubes\u003c\/strong\u003e, a full \u003cstrong data-start=\"656\" data-end=\"680\"\u003esuperhetrodyne tuner\u003c\/strong\u003e, and an \u003cstrong data-start=\"689\" data-end=\"719\"\u003eelectrodynamic 12\" speaker\u003c\/strong\u003e, this unit was—and still is—a powerhouse. Enjoy \u003cstrong data-start=\"768\" data-end=\"805\"\u003ebroadcast and shortwave reception\u003c\/strong\u003e in exceptional clarity, brought to life with glowing vacuum tubes and a deep bass response modern equipment rarely replicates.\u003c\/p\u003e\n\u003chr data-start=\"934\" data-end=\"937\"\u003e\n\u003ch3 data-start=\"939\" data-end=\"994\"\u003e📻 Expert Craftsmanship with Authentic Components\u003c\/h3\u003e\n\u003cp data-start=\"995\" data-end=\"1193\"\u003eBuilt for performance and elegance, the \u003cstrong data-start=\"1035\" data-end=\"1050\"\u003eGrunow 1191\u003c\/strong\u003e features a \u003cstrong data-start=\"1062\" data-end=\"1086\"\u003esuper-chassis design\u003c\/strong\u003e housed in a beautifully preserved cabinet. At its core, the amp uses vintage-correct components including:\u003c\/p\u003e\n\u003cul data-start=\"1195\" data-end=\"1549\"\u003e\n\u003cli data-start=\"1195\" data-end=\"1275\"\u003e\n\u003cp data-start=\"1197\" data-end=\"1275\"\u003e\u003cstrong data-start=\"1197\" data-end=\"1230\"\u003e6F6 output tubes in push-pull\u003c\/strong\u003e, providing 10–14 watts of smooth RMS power\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1276\" data-end=\"1369\"\u003e\n\u003cp data-start=\"1278\" data-end=\"1369\"\u003eA likely \u003cstrong data-start=\"1287\" data-end=\"1315\"\u003ecathodyne phase inverter\u003c\/strong\u003e and \u003cstrong data-start=\"1320\" data-end=\"1340\"\u003e6C5 driver stage\u003c\/strong\u003e to ensure signal integrity\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1370\" data-end=\"1452\"\u003e\n\u003cp data-start=\"1372\" data-end=\"1452\"\u003eIntegrated \u003cstrong data-start=\"1383\" data-end=\"1409\"\u003etone control circuitry\u003c\/strong\u003e—Grunow’s early take on custom EQ shaping\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1453\" data-end=\"1549\"\u003e\n\u003cp data-start=\"1455\" data-end=\"1549\"\u003eA powerful \u003cstrong data-start=\"1466\" data-end=\"1496\"\u003e12-inch field coil speaker\u003c\/strong\u003e delivering full-range sound across ~80 Hz to 8 kHz\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1551\" data-end=\"1726\"\u003eWhether you're an audio historian, collector, or someone restoring a listening room to period perfection, this set captures the essence of early high-performance audio design.\u003c\/p\u003e\n\u003chr data-start=\"1728\" data-end=\"1731\"\u003e\n\u003ch3 data-start=\"1733\" data-end=\"1794\"\u003e📦 Rare Collector’s Piece with Local Pickup Convenience\u003c\/h3\u003e\n\u003cp data-start=\"1795\" data-end=\"2086\"\u003eThis unit is a \u003cstrong data-start=\"1810\" data-end=\"1845\"\u003efunctional conversation starter\u003c\/strong\u003e, perfect for showrooms, vintage listening rooms, or as the centerpiece of a historical media setup. The \u003cstrong data-start=\"1950\" data-end=\"1979\"\u003efull-face bandspread dial\u003c\/strong\u003e, \u003cstrong data-start=\"1981\" data-end=\"2002\"\u003ebeacon-eye tuning\u003c\/strong\u003e, and \u003cstrong data-start=\"2008\" data-end=\"2033\"\u003eclock-style interface\u003c\/strong\u003e bring visual authenticity to match the sonic warmth.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cul data-start=\"2088\" data-end=\"2335\"\u003e\n\u003cli data-start=\"2206\" data-end=\"2245\"\u003e\n\u003cp data-start=\"2208\" data-end=\"2245\"\u003eMeasures: \u003cstrong data-start=\"2218\" data-end=\"2243\"\u003e41\" H x 28\" W x 14\" D\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2246\" data-end=\"2268\"\u003e\n\u003cp data-start=\"2248\" data-end=\"2268\"\u003eWeight: \u003cstrong data-start=\"2256\" data-end=\"2266\"\u003e55 lbs\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2269\" data-end=\"2335\"\u003e\n\u003cp data-start=\"2271\" data-end=\"2335\"\u003eSecure hold available after payment while shipping is arranged\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-start=\"275\" data-end=\"325\"\u003e🎚️ \u003cstrong data-start=\"283\" data-end=\"325\"\u003eGrunow 1191 – Audio Amplifier Overview\u003c\/strong\u003e\n\u003c\/h3\u003e\n\u003ch4 data-start=\"327\" data-end=\"349\"\u003e\u003cstrong data-start=\"332\" data-end=\"349\"\u003eConfiguration\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul data-start=\"350\" data-end=\"728\"\u003e\n\u003cli data-start=\"350\" data-end=\"482\"\u003e\n\u003cp data-start=\"352\" data-end=\"482\"\u003e\u003cstrong data-start=\"352\" data-end=\"378\"\u003ePush-Pull Output Stage\u003c\/strong\u003e – This design uses two output tubes working in opposite phases to reduce distortion and increase power.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"483\" data-end=\"604\"\u003e\n\u003cp data-start=\"485\" data-end=\"604\"\u003e\u003cstrong data-start=\"485\" data-end=\"511\"\u003eClass AB Amplification\u003c\/strong\u003e – Most likely employed for better efficiency and cleaner audio at both low and high volumes.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"605\" data-end=\"728\"\u003e\n\u003cp data-start=\"607\" data-end=\"728\"\u003e\u003cstrong data-start=\"607\" data-end=\"633\"\u003eHigh-Fidelity Emphasis\u003c\/strong\u003e – Marketed for its “high fidelity” audio reproduction, which was a premium feature in 1936–37.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"730\" data-end=\"733\"\u003e\n\u003ch3 data-start=\"735\" data-end=\"766\"\u003e📻 \u003cstrong data-start=\"742\" data-end=\"766\"\u003eTechnical Components\u003c\/strong\u003e\n\u003c\/h3\u003e\n\u003ch4 data-start=\"768\" data-end=\"789\"\u003e\u003cstrong data-start=\"773\" data-end=\"789\"\u003eOutput Tubes\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul data-start=\"790\" data-end=\"1045\"\u003e\n\u003cli data-start=\"790\" data-end=\"1045\"\u003e\n\u003cp data-start=\"792\" data-end=\"843\"\u003e\u003cstrong data-start=\"792\" data-end=\"809\"\u003eTwo 6F6 tubes\u003c\/strong\u003e in a \u003cstrong data-start=\"815\" data-end=\"828\"\u003epush-pull\u003c\/strong\u003e configuration.\u003c\/p\u003e\n\u003cul data-start=\"846\" data-end=\"1045\"\u003e\n\u003cli data-start=\"846\" data-end=\"928\"\u003e\n\u003cp data-start=\"848\" data-end=\"928\"\u003eThese pentode tubes were standard for quality audio output during the mid-1930s.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"931\" data-end=\"1045\"\u003e\n\u003cp data-start=\"933\" data-end=\"1045\"\u003ePush-pull helps cancel even-order harmonic distortion and provides higher output power (around \u003cstrong data-start=\"1028\" data-end=\"1043\"\u003e10–14 watts\u003c\/strong\u003e).\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4 data-start=\"1047\" data-end=\"1070\"\u003e\u003cstrong data-start=\"1052\" data-end=\"1070\"\u003ePhase Inverter\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul data-start=\"1071\" data-end=\"1176\"\u003e\n\u003cli data-start=\"1071\" data-end=\"1176\"\u003e\n\u003cp data-start=\"1073\" data-end=\"1176\"\u003eLikely used a \u003cstrong data-start=\"1087\" data-end=\"1113\"\u003ecathodyne (split-load)\u003c\/strong\u003e or \u003cstrong data-start=\"1117\" data-end=\"1147\"\u003etransformer phase inverter\u003c\/strong\u003e to feed the push-pull stage.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4 data-start=\"1178\" data-end=\"1199\"\u003e\u003cstrong data-start=\"1183\" data-end=\"1199\"\u003eDriver Stage\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul data-start=\"1200\" data-end=\"1298\"\u003e\n\u003cli data-start=\"1200\" data-end=\"1298\"\u003e\n\u003cp data-start=\"1202\" data-end=\"1298\"\u003eTypically a \u003cstrong data-start=\"1214\" data-end=\"1231\"\u003esingle triode\u003c\/strong\u003e, possibly a \u003cstrong data-start=\"1244\" data-end=\"1251\"\u003e6C5\u003c\/strong\u003e, used to amplify and drive the phase inverter.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4 data-start=\"1300\" data-end=\"1332\"\u003e\u003cstrong data-start=\"1305\" data-end=\"1332\"\u003ePreamp and Tone Control\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul data-start=\"1333\" data-end=\"1566\"\u003e\n\u003cli data-start=\"1333\" data-end=\"1432\"\u003e\n\u003cp data-start=\"1335\" data-end=\"1432\"\u003ePreamp tube (likely 6C5 or 6J5) handled the initial audio signal amplification from the detector.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1433\" data-end=\"1566\"\u003e\n\u003cp data-start=\"1435\" data-end=\"1566\"\u003eGrunow included \u003cstrong data-start=\"1451\" data-end=\"1473\"\u003e“fidelity control”\u003c\/strong\u003e, which suggests \u003cstrong data-start=\"1490\" data-end=\"1525\"\u003evariable tone shaping circuitry\u003c\/strong\u003e, possibly with treble cut or bass boost.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4 data-start=\"1568\" data-end=\"1584\"\u003e\u003cstrong data-start=\"1573\" data-end=\"1584\"\u003eSpeaker\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul data-start=\"1585\" data-end=\"1811\"\u003e\n\u003cli data-start=\"1585\" data-end=\"1811\"\u003e\n\u003cp data-start=\"1587\" data-end=\"1638\"\u003e\u003cstrong data-start=\"1587\" data-end=\"1621\"\u003e12-inch electrodynamic speaker\u003c\/strong\u003e with field coil.\u003c\/p\u003e\n\u003cul data-start=\"1641\" data-end=\"1811\"\u003e\n\u003cli data-start=\"1641\" data-end=\"1726\"\u003e\n\u003cp data-start=\"1643\" data-end=\"1726\"\u003eElectrodynamic speakers used a powered electromagnet instead of a permanent magnet.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1729\" data-end=\"1811\"\u003e\n\u003cp data-start=\"1731\" data-end=\"1811\"\u003eProvided strong bass response and improved clarity compared to smaller speakers.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1813\" data-end=\"1816\"\u003e\n\u003ch3 data-start=\"1818\" data-end=\"1851\"\u003e🔊 \u003cstrong data-start=\"1825\" data-end=\"1851\"\u003ePerformance Highlights\u003c\/strong\u003e\n\u003c\/h3\u003e\n\u003cul data-start=\"1852\" data-end=\"2134\"\u003e\n\u003cli data-start=\"1852\" data-end=\"1920\"\u003e\n\u003cp data-start=\"1854\" data-end=\"1920\"\u003e\u003cstrong data-start=\"1854\" data-end=\"1870\"\u003ePower Output\u003c\/strong\u003e: ~10–14 watts RMS – very respectable for 1936–37.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1921\" data-end=\"2034\"\u003e\n\u003cp data-start=\"1923\" data-end=\"2034\"\u003e\u003cstrong data-start=\"1923\" data-end=\"1942\"\u003eFrequency Range\u003c\/strong\u003e: Wide for its era (~80 Hz to 8 kHz or more), contributing to the “high-fidelity” marketing.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2035\" data-end=\"2134\"\u003e\n\u003cp data-start=\"2037\" data-end=\"2134\"\u003e\u003cstrong data-start=\"2037\" data-end=\"2053\"\u003eTone Control\u003c\/strong\u003e: Likely rotary or switch-based tone shaping for different listening preferences.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"2136\" data-end=\"2139\"\u003e\n\u003ch3 data-start=\"2141\" data-end=\"2155\"\u003e🔧 Summary\u003c\/h3\u003e\n\u003cp data-start=\"2156\" data-end=\"2437\"\u003eThe Grunow 1191’s audio amplifier was a well-designed, push-pull tube setup that delivered powerful and relatively distortion-free sound\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e3.5 mm input jack  - For Electric guitar, Bluetooth Input\u003c\/li\u003e\n\u003cli\u003eBlue tooth enabled device included\u003c\/li\u003e\n\u003cli\u003eEleven Tube\u003c\/li\u003e\n\u003cli\u003eThree Band\u003c\/li\u003e\n\u003cli\u003eSuperhetrodyne Receiver\u003c\/li\u003e\n\u003cli\u003eFull face band spread dial\u003c\/li\u003e\n\u003cli\u003eBeacon Eye Tuning Indicator\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e9 AM circuit(s)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eBroadcast plus 2 Short Wave bands.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eClock-type dial\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e12-inch dynamic speake\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003epush-pull high fidelity audio system\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"list-group-item list-group-item-rm\"\u003eSuper-chassis design\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eMeasures: 41\"h x 28\"w x 14''d\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003cbr\u003eWeight: 55 pounds\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003cspan\u003ePLEASE NOTE: This set is located in Sugar Grove, Illinois and can be picked up there for a discount.\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003ePayment must be received BEFORE pickup or delivery is scheduled.\u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Renovated Radio","offers":[{"title":"Default Title","offer_id":50122771169586,"sku":"GRUNOW","price":2100.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0250\/5097\/2245\/files\/832823AE-012B-429F-B4EB-5A7F4DB9CD6D.png?v=1774229563","url":"https:\/\/bigriverhardware.com\/products\/grunow-1191-vintage-tube-amplifier-push-pull-hi-fi-audio-free-shipping","provider":"Big River Hardware","version":"1.0","type":"link"}