Nakamichi Amplifier 1 stereo amplifier - charcoal grey :
Full range detailed sound with added convenience of remote control of input selection and volume
The Vintage Knob :
Since Nakamichi had stopped licensing Nelson Pass' STASIS circuit, something else had to be found to differentiate the mid-priced Nakamichi amps from the Sony, Kenwood or Yamaha amps . . .
In came HTA : Harmonic Time Alignment : Designed by Mr Karison in Naka's California Research Center, HTA aims at properly putting in phase whatever little distortion may be left and the original, non-distorted, signal. According to Nakamichi, this phase sync is most of the time ruined by the negative feedback loop of regular amplifiers, leading to a harsh and grainy sound.
Circuit-wise, the result is that no global Negative Feedback is applied, but each stage has its own, regulated, NFB loop. Luxman, Pioneer did this in the early 1980s [Duo-Beta] and others before . . . and since
The rest of the Amplifier 1 shows input stages made exclusively of discrete componentry, isolated ground path, tone controls with a low Q [to not alter the midband], a high-current / low-impedance output stage with 8 PNP/NPN transistors able to output 28A per channel, gold-plated CD and phono terminals, a supplementary CD Direct input terminal (bypassing tone etc), a properly designed phono stage (for the Amplifier 1's pricepoint) and an IR remote to relay-switch sources (rotary encoder, left large knob) and set volume through a 4-gang motorized pot probably ALPS sourced (right knob)
The MM / MC switch is at the back
Besides all this, the most striking feature of the Amplifier 1 and that of the smaller Amplifier 2 and of the Cassette Deck 1 and 2 is design : a well balanced set of proportions encased by the two protruding side stoppers
Includes Nakamichi Amplifier 1 remote control
Some top surface scratches
Specifications :
-:®:- Power : 80W RMS at 8 ohms, rated THD distortion 0.1%, 130W at 4ohms
-:®:- Peak output current : 28A per channel
-:®:- Dynamic power : 180W at 4ohms, 270W at 2ohms
-:®:- 1990 vintage
-:®:- Frequency response : 20Hz to 22kHz + 0dB / - 0.5dB, 5Hz to 80KHz +0dB / -3dB
-:®:- Signal to noise : > 105dB at rated output
-:®:- Phono signal / noise : MC: 70dB, MM: 82dB A-weighted
-:®:- Dimensions [ W x H x D ]: 430 x 125 x 370mm
-:®:- Weight : 15.0kg
SOLD April 2011 on trademe to Timaru
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