{"product_id":"supro-jupiter-1668rt-1x12-tube-amp-w-reverb-tremolo-class-a-or-ab","title":"Supro Jupiter 1668RT 1x12 Tube Amp w\/ Reverb \u0026 Tremolo, Class A or AB","description":"Up for sale, a Supro Jupiter 1x12” combo amplifier in near-mint, 100% original condition and in perfect working order. This all-tube Supro features switchable rectifier topology, selecting between 35-Watts (Class A) or 45 \/ 60 watts (Class AB). The 35 watt cathode bias mode uses the classic Thunderbolt power amp, resulting in a harmonically rich, tube-rectified sound. The 45 and 60 watt grid bias modes provide more volume and headroom, as well as the faster transient response associated with Class AB power amps.\n\nThe switchable power amp topology of the Jupiter not only allows for players to change the texture and output volume of the amp, but it also provides two very different, all-tube tremolo effects depending on whether Class A (cathode bias) or Class AB (grid bias) mode is selected. The cathode bias tremolo is a vintage Valco\/Supro design, where the overall depth of the effect changes along with the dynamics of your playing. The grid bias tremolo is a much deeper, stronger and more pronounced throbbing effect. The reverb effect is tube-driven as well, with plenty of dimension and splash.\n\nSimple, user-friendly controls include Volume, Treble and Bass, with a single knob governing the Reverb effect, and Speed and Depth knobs for the Tremolo. The tube complement includes two 5881 (6L6GC) power tubes, a 5U4 rectifier, and a preamp section of four 12AX7s and one 12AT7.\n\nThe Jupiter is loaded with a USA-made Eminence HP12 speaker, designed specifically for this model. The HP12 is a unique driver that combines the exceptional clarity and treble extension of the Supro DT12 with superior power handling due to a larger magnet and a hemp cone. It remains smooth and sweet, with a full-bodied and woody character no matter how hard it's pushed.\n\nThe cabinet sports Supro’s distinctive Blue Rhino Hide tolex wrap and silver sparkle grillcloth with raised Supro badge. The premium leather handle has a central, taped-over split, and beyond that, there's barely a mark on the enclosure.","brand":"Supro","offers":[{"title":"Default Title","offer_id":43673004671232,"sku":"00039","price":999.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0550\/4437\/4714\/products\/medium_662e762c-4421-4ed3-91f2-c655076fc508.jpg?v=1751569771","url":"https:\/\/mmguitarbar.com\/products\/supro-jupiter-1668rt-1x12-tube-amp-w-reverb-tremolo-class-a-or-ab","provider":"Mike \u0026 Mike's Guitar Bar","version":"1.0","type":"link"}