NEC A-11 A11 audiophile stereo integrated amplifier, VERY RARE!!

Model

A-11

Brand

NEC

Rare NEC A-11 vintage Hi Fi stereo integrated amplifier for sale. $1,300 plus shipping if not local, or best negotiated offer. This may be the only one for sale in the United States currently. I haven’t seen another one. They pop up on eBay about twice a decade from what I can tell. A-10s are often available, although most come from Japan. This A-11 is in Atlanta. This is a great and seldom seen opportunity to acquire one of NEC’s best and rarest integrated amplifiers, and to do so within the United States. The unit was recently serviced by having the volume pot replaced with a new ALPS unit (523G-20KAx2; same as the original), and replacing the power button lamp. It is working and in good condition, and one of the most important entries of the NEC Authentic Series. I always used this amp with an SAE 180 Parametric Equalizer, and that combination sounds fantastic. I have kept this unit very clean during my 10+ years of ownership of it after purchasing it used. This model very rarely appears for sale. I’ve read that less than 400 were ever made but I can't verify that. I believe that I remember seeing only one other A-11 listed for sale in the United States since I purchased this one. It does have a few scuffs and normal wear from the previous ownership, but most is easily covered with a black Sharpie, which I have carefully done during my ownership and it will come to you that way as well. Most are slightly visible in the amplified light of the provided pics, but are much more pronounced in these pics than in real-life actual use, where they are virtually invisible without making a close-up and deliberate inspection. It looks excellent sitting inside a normal audio set-up and alongside other components. There is a very small dent in the lower-left front corner, hard to spot, and a little larger than a quarter-sized spot of rust inside on the right rear of the top frame, under the chassis cover. Both were there when I purchased it. I’ve considered painting that part of the interior frame but have decided to leave it as original. Everything else is very effectively covered, and it’s an extremely handsome unit. Coming with it will be a spare ALPS volume pot (523G-20KAx2). I bought two of them just in case the tech needed it if something went wrong during the install, which it did not, and I obviously won’t need it anymore. PLUS an ORIGINAL copy of the NEC Model A-11E Service Manual for this unit; Perfect for anyone with some technical knowledge who might like to do a rebuild some day on this beautiful beast of an amp. Shipping only to the upper contiguous 48 states. This amp is heavy, a little over 50lbs. 60lbs plus for shipping. If you're in Alaska or Hawaii, let me know and maybe we can work something out. Published info and specs for the A-11 from The Vintage https://offerup.com/redirect/?o=S25vYi5jb20= and https://offerup.com/redirect/?o=YXVkaW8tZGF0YWJhc2UuY29t are listed below. Seriously interested parties are welcome to email me to discuss further or ask questions. Thanks very much! =========== After a first series of mid-end separates ("Authentic") in the late 1970s, NEC went all out with the new decade and for the upcoming new format : the original A-10 amp was engineered to cope with said new format's dynamic range - its many subsequent versions were biased toward that : POWER ! The A-11 sure was built like few mid-end amplifiers were in those early digital days : all steel, all metal, three mutha toroidal trafos and a special audio engineering slant which was kept until the last version of the series in the early 1990s : A-10 Type V. The two main transformers are dedicated to the left and right channels with separate windings for their respective section ; the third transformer (the one that embodies the "Reserve" tag) comes in whenever more current is necessary. While in a regular power supply, tension coming out of a transformer is rectified then filtered, in the Reserve II scheme, a second double-winding transformer kicks in after the rectifying and before the filtering, to smooth out the two rectifying phases. Power filtering is done by 8x 8200µF / 50V caps ; preamp filtering is done by 6x 2200µF / 56V caps. HifT power transistors. Form High-quality integrated amplifier Circuit system Whole page direct DC servo circuitry Effective output (both channel drive) A sinusoidal consecutive output, 20Hz - 20kHz 140W+140W (4ohm) 70W+70W (8ohm) THD (at the time of an effective output) 0.003% or less Cross modulation distortion (at the time of an effective output) 0.003% or less Frequency characteristic 5Hz - 300kHz Circuit system Whole page direct DC servo circuitry Input sensitivity/impedance Phono man month: 2.5mV / 47kohm compact disk, Tuner, AUX, Tape1, 2:150mV / 10kohm An Output voltage/impedance Rec output: 150mV/100 ohms Preamplifier output: 1.23V/600 ohm SN ratio Phono MM:90dB(-142dBV) compact disk, Tuner, AUX, Tape1, 2:110dB (-126dB