Various ADDITIONAL TUBES INCLUDED TUBE BUFFER INCLUDED WITH a FULL PRICE OFFER place BUFFER inline between source or pre-amp for a sweeter TUBE sound DOUBLE BOXED READY TO SHIP THE AMPLIFIER ➡Harvey Rosenberg (doctor of gizmology*) and George Kaye of New York Audio Labs produced these tube/transistor amplifiers about 30 years ago, and people still talk about them today. This is the original production amp, (NO "I can upgrade it for you" cheapo Mods) If you would like it upgraded, the only folks I would let touch it is : [ kayeaudiolabs.com/M_mods_upgrades.html ] The Moscode 600 uses a tube front end into Mosfet solid state output devices (12) that produce 300 watts at 8 ohms and 500 watts at 4 ohms, so there's plenty of power to drive just about any speaker. When first introduced one reviewer stated for an experiment that it had enough current to run to a vacuum cleaner!! It is rare to see them for sale on the used market. But I have to say good bye. Buy It Now 4 $1,149 firm. I'm getting to old to lug this 45 Lb behemoth around and I have way to many amps. I have seen these beauties go for over $1,900 Recently installed NOS tubes which have about 150 hours burned on them. Extra TUBES INCLUDED. TUBE BUFFER INCLUDED WITH FULL PRICE OFFER! You will enjoy the pure sounds of classic rock, piano & jazz, female vocals, blues and classical symphonies for a fair value plus shipping to your zip code. [ A new Moscode HR401 SELLS FOR over $4,000 ] Bubbled wrapped and double boxed. Thank you for your interest and If you have any questions feel free to message ----------------------------------------------------------------------------------------------- Specifications: Power output: 300 watts per channel into 8Ω (stereo) Frequency response: 20Hz to 60kHz Input sensitivity: 1.55V Signal to noise ratio: 90dB Semiconductors: 12 x MosFet, 41 x diodes, 2 x FET, 2 x IC, 5 x transistors Valve complement: 3 x 6DJ8, 2 x 6FQ7, 2 x 6LU8 Dimensions: 16.5 x 7.5 x 14.5 inches Weight: 45lbs Manual Available At: files.buyitsellit.com/43065/Moscode%20600%20manual.pdf *[ A devotee of engineer Julius Futterman, pioneer of the output-transformerless (OTL) amplifier, Rosenberg made his indelible mark on the high-end industry as owner of New York Audio Labs. In what would become legendary (and typical) Rosenberg style, he shipped each NYAL Moscode amplifier with an adult-size diaper, with instructions for the audiophile to put it on before listening, should an accident ensue... ]✌ note: all vintage electronics are sold as is without warranty