Sony N-900 (Years unknown)
Little is documented about the Sony N-900. The only period reference under this name is a bench comparison in Audio (June 1983, p.65) that identifies the unit as the Sony TA-N900. No surviving catalog page or service manual settles whether that is the full designation of the N-900 or a closely related model. The review describes a serious power amplifier. At mid-frequencies it began clipping at 262 watts into an 8-ohm load, ahead of the Denon unit tested alongside it, which clipped at 231 watts. Input sensitivity for rated output was 1.65 V. Like the Denon, its response extended beyond 100 kHz at the -1 dB roll-off point.
The same report noted that the Sony's cooling system runs continuously, though quietly enough that it only draws attention if you're sitting right on top of the amplifiers. Beyond that single review there are no production dates, no original price and no service literature. Photographs, catalogs, or owner memories of an N-900/TA-N900 would be a welcome addition to the Archive.
What the Audio test establishes:
- Output at clipping, 8 Ω (mid-frequencies): 262 W/ch
- Input sensitivity (rated output): 1.65 V
- −1 dB response: beyond 100 kHz
- Cooling: continuous operation, described as quiet
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