Balanced Audio Technology VK-55. For trade or sale. We sell a perfect working order BAT VK55 stereo tube power amplifier. Great condition cosmetically. Original package. Worldwide shipping with fully insurance and tracking. The Easiest Tube Amplifier to Own: BAT VK-55 Tube Power Amp Features Superb Midrange, Power, and DynamicsGolden Ear Award-Winning Design Boasts All-Triode Topology and Auto-Biasing: Just Turn On the Balanced Audio Technology VK-55 Tube Power Amp and Play MusicWinner of The Absolute Sounds Golden Ear Award, the BAT VK-55 tube power amplifier has for years running been the go-to amp for music lovers seeking the renowned manufacturers hallmark sound in a component that boasts rigorous design principles and a more affordable price point. Skimping on nothing that has made BAT a preeminent high-end company, VK-55 provides superb midrange clarity, power, and dynamics. Plus, all-triode topology and auto-biasing means its the easiest tube amp you could hope to own. Forget about worrying about tube mismatching, aging, or warm-up. Just turn the VK-55 on and play music!Compact Chassis, Outstanding Performance, Stunning AffordabilityThe Balanced Audio Technology VK-55 represents the meticulous application of modern design principles to the development of a compact, affordable, and supremely easy-to-use vacuum-tube power amplifier that sets a new standard for musicality in its class. The result is a unique combination of fully balanced, all-triode design topology, automatic biasing of individual output tubes, and a marvelously simple upgrade path to monoblock operation – all in a chassis more compact than any previous BAT tube amplifier design. Beyond providing outstanding musical performance, the VK-55 is eminently affordable as well.Uses Same High-Current Tube as BAT Flagship Power AmpMany BAT customers asked for a smaller and more affordable tube amplifier that meets our rigorous design standards while providing the breath of life to music characteristic of the BAT sound. The VK-55 is the answer to their dreams! By using the same high-current dual-triode 6C33C-B tube employed in our flagship REX II Power amplifier, the VK-55 (55Wpc stereo, 110Wpc monoblock configuration) delivers the high-current kick required to drive even difficult low-impedance speaker loads. You can simply choose the stereo or monoblock version based upon your choice of speaker and room size. The VK-55 can be upgraded to Stereophile Class-A rated VK-55SE status at any time.Intelligent Auto-Bias Design Makes Use EasyThis power amplifiers advanced engineering eliminates the traditional headache associated with most vacuum-tube power amplifiers – specifically, the constant need to set and readjust the proper bias of the output tubes – as the VK-55 features an intelligent automatic bias design that adjusts for changing line voltage and aging tubes, with each output tube having its own dedicated bias circuit. The auto-bias circuit also ensures that your VK-55 sounds wonderful within the first few minutes of listening. Youll immediately experience the midrange clarity, power, and dynamics that have made BAT one of the most respected brands in high-end audio. All you need to do is listen!After more than ten months of constant use this sweet-honey of an amp continues to impress with its inherent ease and musicality....its warmth, natural textural and harmonic qualities, and open, airy presentation are very satisfying. Its got what I call musical detail in that everything comes through in a way that serves the musical whole, allowing you to enjoy and become immersed in each performance!– Wayne Garcia, The Absolute Sound, Golden Ear AwardSPECS.Number of Channels: 2/1Watts per channel at <3% THD, 8 Ohm or 4 Ohm: 55 W / 110WFrequency Response @ -3dB: 7Hz - 220kHzInput Connection: XLRInput Resistance - phase to ground: 215k Ohm / 100 k OhmInput Sensitivity: 1 VTube Complement: 4x 6SN7 4x 6C33BDimensions (WH D): 17 x 8 x 16Weight - unpackaged: 50 lbs.