The NAD T973 employs monoblock construction for each of its seven channels. Every element of each channel’s circuitry, save the power supply is fully independent, eliminating inter-channel interference as a concern. The T973 employs active ground isolation to further eliminate any possibility of inter-channel interference even when more than one preamplifier is driving the power amp (as might be the case in a custom installation).

Each section features an FET Class A input and driver stage circuits, and a high-current output-stage design, employing high speed, high current discrete output devices to promulgate superb dynamic quality. The result is musical detail, impact, and soundstage stability and depth unmatched by multi-channel amps of even two and three times the T973’s price. This multi-channel amplifier delivers its output via heavy-duty “five-way” connectors. The T973 also benefits from NAD’s proprietary PowerDrive circuit topology, the circuitry automatically sensing the impedance characteristics of a loudspeaker then adjusting its power supply settings to best cope with that specific load. PowerDrive topology is a practical approach to enable an amplifier to easily deal with musical dynamics and difficult speaker loads.

Features and Specifications:
7 x 140W Minimum Continuous Power (8 / 4 Ohms); all channels driven simultaneously
2 x 200W Continuous Power (8 / 4 Ohms)
230W, 390W and 450W IHF Power into 8, 4 and 2 ohms, respectively
Mono-block, Modular construction
Differential, Class A input circuit topology
High Current Holmgren™ Toroidal Power Transformer
Input gain control for each individual channel
Gold Plated RCA Inputs
NAD Soft Clipping™
12V Trigger for automated ON/OFF operation
Continuous Power, 20Hz-20kHz, all channels
driven simultaneously at 4/8 ohms
7 x 140W (21.5dBW)
Rated distortion (THD 20Hz-20kHz) 0.03%
Clipping Power (0.1% THD) 170W (22.1dBW)
IHF power dynamic headroom at 8 ohms +1.4dB
IHF power dynamic power 8 ohms 230W (24dBW)
4 ohms 390W (26dBW)
Damping factor ref. 8 ohms, 50Hz >300
Input impedance (rated power into 8 ohms) 50k
Input sensitivity 1.1 V
Voltage gain 29.0dB
Frequency response 20Hz-20kHz +0, -0.2dB; 2Hz to 100kHz -3dB
Signal/noise ratio ref. 1W 95dB (ref. rated power) 125dB
Dimensions (W x H x D) 17 1/8" x 5 3/16" x 18 3/4"