Stereo Power Amplifier 2150

A 2 x 50 watt hi-fi stereo Power Amplifier. With a high-voltage, high-current output stage enabling it to deliver well above its rated power to handle musical transients, and a 'soft clipping' circuit which gently limits the waveform voltage when the amplifier is driven beyond its rated power.

On the rear, Main-In sockets for connection to a pre-amplifier, connectors for two pairs of loudspeakers, switches for Soft Clipping (On/Off), Bridging (On/Off) and a Speakers Impedance switch (Normal/Hi (≥ 8Ω)), the Hi setting can be used where one pair of speakers are connected and their impedance is at least 8Ω, this re-optimizes the amplifier for maximum power. Some models have a switched and an unswitched AC outlet and some a voltage selector.

On the front, switches for Power, Speakers A, B, LED indicators for Power, Protection and Soft Clipping and a jack for headphones.

Specification
Speakers Impedance Switch Set:            Normal      Hi (≥ 8Ω)
Continuous Average Power Output at
 8 ohm 20-20K Hz both Channels Driven :  50 W        60 W
Rated Distortion  20Hz-20kHz ...............:  <0.03%   <0.03%
Clipping Headroom at 8 ohm .................:  +0.5 dB   +0.5 dB
Clipping Power at 8 ohm .......................:  57 W        68 W
                       at 4 ohm ......................:  80 W         -
                       at 2 ohm ......................:  90 W         -
Dynamic Headroom at 8 ohm ...............:   +1.8 dB    +1.6 dB
Dynamic Power at 8 ohm .....................:  90 W        100 W
                        at 4 ohm ....................:  150 W         -
                        at 2 ohm ....................:  180 W         -
Damping Factor at 50 Hz (Ref. 8 ohm) ..:  >100
THD 20Hz-20kHz from 250mW to 60W  :  <0.03%
Frequency Response, 20Hz-20kHz .......:  ±0.5 dB
Frequency Response Range -3 dB ........: 10Hz-35kHz

Versions/Power Requirements
110 or 120 V AC 60Hz
220 or 240 V AC 50Hz
110/120/220/240 50/60Hz with voltage selector (not on US/Canada/UK models)

Made in Taiwan

In questo link sono elencati 120 modelli, di cui 118 con immagini e 26 con schemi.
Elenco delle radio e altri apparecchi della NAD, New Acoustic Dimension; Ontario