NAD T977 User Manual

T 977 Seven-Channel Power Ampli er

Our T 977 is an extremely powerful, high performance seven-channel power ampli er capable of delivering the musical muscle that serious movie

lovers demand. Along with NAD’s T 187 Surround Sound Preamp Processor, you’ll enjoy a sophisticated home theatre system that will rival gear

costing many times more. We doubt you’ll  nd anything that comes close to the T 977’s overall musical satisfaction, well-rounded performance, and

complete value.

7 x 140W

> Powerful Impact

The T 977 unleashes 140 watts of continuous power and

ﬂ exes its musical muscle with peaks of 1000 watts into seven

channels for an audio experience that simply has to be heard.

Thanks to its specially designed Holmgren Torodial power

supply, the T 977 will never come up short in power, handling

even the most demanding music and  lm soundtracks with

ease and control.

> Legendary Technology

Our NAD PowerDrive circuit delivers very high dynamic power

and low impedance drive to accurately control loudspeakers,

resulting in remarkably musical and relaxed sound. PowerDrive

gives the T 977 maximum power no matter what you throw at it.

We also include our exclusive Soft Clipping feature to protect

your speakers (and ears) from damaging clipping distortion.

> ‘Music First’

With total elimination of audible distortion at any listening

level, the T 977 provides precise imaging and spine tingling

realism in movies and music alike. Each of its seven channels

is fully independent to eliminate inter-channel interference and

noise with the use of NAD’s active ground circuit, and features

MOSFET Class A input and driver stage circuits with a high-

current output stage design employing high speed, discrete

output devices. The result is superb dynamic quality and

musical detail.

> Radically Cool

The T 977 is cooled and controlled by a uniquely designed

forced air system originally introduced in our top-of-the-

line Masters Series M25. The circuit measures not only the

temperature of the heat sinks, but also the level of the input

signals, to automatically silence the fans so as not to spoil quiet

music passages. A combination of fuse and electronic non-

intrusive protection safeguards each of the seven channels

against excess temperature, DC fault, and loudspeaker

short-circuit.

> Installer’s Dream

Developed with system integration and ﬂ exibility in mind, the

T 977 includes programmable 12V triggers and an RS-232

port. Individual gain adjustment for each channel promotes

easy, accurate system con guration, as does the integral 12V

trigger turn-on response. The T 977 is also out tted with heavy-

duty,  ve-way connectors and gold-plated RCA input jacks.

> Ef cient and Reliable

The T 977 power supply is designed with our exclusive

Holmgren transformer, which together with PowerDrive, acts as

a “fuel cell” that supplies power to the audio circuitry and power

amp, yet maintains superb isolation between the ampli er and

any “dirty” noise on the AC supply that could affect the overall

audio performance. A convenient automatic standby mode

saves energy when the T 977 is idle.

T 977

FR O NT R

MAX

MIN

LEVEL

INPUT

SPEAKER

FRONT R

CHANNEL 7

Total Width 435mm

Seven Channel Power Amplifier T 977

SOFT

CLIPPING CH 1 CH 2 CH 3 CH 4 CH 5 CH 6 CH 7

CHA NN EL 7

SPEAKER

CHANNEL 6

CHA NN EL 6

S UR R R

MAX

MIN

LEVEL

INPUT

SPEAKER

SURR R

CHANNEL 5

CHA NN EL 5

S UR R -B R

MAX

MIN

LEVEL

INPUT

SPEAKER

SURR-B R

CHANNEL 4

CHA NN EL 4

C EN TE R

MAX

MIN

LEVEL

INPUT

SPEAKER

CENTER

CHANNEL 3

S UR R -B L

SURR-B L

CHA NN EL 3

MAX

MIN

LEVEL

INPUT

SPEAKER

CHANNEL 2

ON OFF

SOFT

CLIPPING

CHA NN EL 2

S UR R L

MAX

MIN

LEVEL

INPUT

SPEAKER

SURR L

CHANNEL 1

+12V TRIGGER IN

FRONT L

MAINS IN

CHA NN EL 1

FR O NT L

MAX

MIN

LEVEL

INPUT

FUSE

Total Depth 476mm

Total Height

194mm

Specications

T 977

Continuous Output Power into 8 ohms and 4 ohms 7 x 140W (ref. rated THD, 20Hz-20kHz, all channels driven) Rated THD (250mW to rated power, CCIF IMD, DIM 100) ≤0.03% (ref. 20Hz-20kHz)

Clipping Power ≥185W (ref. 1kHz, 4 ohms, 0.1% THD)

IHF Dynamic Power

8 ohms

4 ohms

2 ohms Damping Factor >300 (ref. 8 ohms, 50Hz and 1kHz) Input Sensitivity Voltage Gain 29dB

Frequency Response ±0.2dB (ref. 20Hz-20kHz)

Signal/Noise Ratio, A-Weighted

Time to Automatic Standby (without signal) <30 minutes

GENERAL

Rated Power 800W (120V 60Hz, 230V 50Hz) Idle Power <300W Standby power <0.5W Unit Dimension

(WxHxD) - Gross **

(includes feet, knobs and terminals) Net weight 32.3kg (71.2lb) Shipping weight 36.5kg (80.5lb)

230W 390W 450W

1.1V (ref. rated power)

-3dB at 3Hz and 100kHz

>96dB (ref. 1W) >125dB (ref. 140W)

435 x 194 x 476mm 17 1/8 x 7 11/16 x 18 3/4”

** Non-metric measurements are approximate.

Note: Installers should allow a minimum clearance of 55mm for wire/cable management.

NAD Electronics International reserves the right to change specications or features without notice. NAD is a registered trademark of NAD Electronics International. All rights reserved. No part of this publication may be reproduced, stored, or transmitted in any form whatsoever without the written permission of NAD Electronics International. © 07/12 12-004 NAD Electronics International.

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