Stereo Integrated Amplifier (1980)
Distinctive performance in power supplies and output stages makes the NA-2090 a most desirable unit for the serious audiophile.
Operation is by self-illuminated buttons which work under the slightest pressure.
An 11-LED power level indicator for each channel expands and contracts according to the power output moment to moment.
Switching distortion is absolutely zero, thanks to the use of the latest non-switching amplifier in the power amp section.
Power output is 85 watts per channel, minimum RMS, both channels driven, into 8 ohms from 20 to 20,000 Hz with no more than 0.015% THD.
The power amp is of DC configuration for high quality reproduction and improved sonic transparency. Not a single capacitor is used in the amp's signal path or NFB network.
Virtues include controlled damping, uniform phase response in mid-to-high frequencies, near total lack of Transient Intermodulation distortion.
A built-in pre-preamp for moving coil cartridges can be switched via a front panel control.
Power output: 85 watts per channel into 8Ω (stereo)
Frequency response: 20Hz to 20kHz
Total harmonic distortion: 0.015%
Damping factor: 50
Input sensitivity: 0.25mV (MC), 2.5mV (MM), 150mV (line)
Signal to noise ratio: 70dB (MC), 86dB (MM), 105dB (line)
Dimensions: 420 x 120 x 335mm
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Reviewed Jul 07th, 2015 by fatagnus
Listening to Miles Davis's Bitches Brew - mp3 player to AUX in and out to a pair of 5-way BSRs was just about as good as it gets for an integrated AMP. The matching tuner doesn't quite hit the mark.