NAD NAD Theater T770 T770 T770 Specifications

T770 Surround Sound Receiver

• 5 x 70 Watts • Up to of 40 amps peak current capability

• Dolby Digital decoder integrated • Motorola 56009 and 56004 DSP processors

• Burr-Brown DACs with 18 bit resolution • 5.1 input for external decorder

• Pre-outs for all 5 channels • Subwoofer output • Impedance Sensing Circuitry (ISC)

• 4 Audio inputs; 2 tape outputs • 5 Video inputs; 2 video outputs

• 3 digital inputs • EARS (Enhanced Ambience Recovery System) surround mode

• Tone Defeat • Gold Plated Sockets throughout • 30 presets

• Soft Clipping • System Remote Control • NAD-Link

Most A/V receivers available on the market today focus predominantly on 

the Video and Surround Sound aspects, leaving audio circuitry almost 

as an afterthought. NAD firmly believes that there are many people for 

whom music will always come first so. With NAD’s reputation for high value

/high performance it was obvious that the Model T770 would have to 

please Audiophiles and Videophiles alike.

Design

By doing away with many costly and superfluous features, NAD’s engineers 

concentrated only on the truly important parts of an A/V receiver. As the

new Digital Surround Sound formats allow for the same wide bandwidth 

and large dynamic range for the rear channels as the rear channels, all five 

channels are capable of putting out an equal amount of power. As usual 

with NAD, the T770 uses discrete output stages only, including the 

surround channels. The benefits of this approach have been proven over 

the years in many acclaimed NAD amplifiers and receivers. The integrated 

output modules favored by so many other designs will deliver a decent 

amount of power under laboratory conditions, driving an 8 ohms resistor, 

but can have great difficulties in driving real world loudspeakers.

Impedance Sensing Circuitry (ISC)

The new Impedance Sensing Circuitry (ISC) topology designed by Bjørn 

Erik Edvardsen allows the T770 to deliver maximum performance under 

virtually any circumstance, independent of the loudspeakers it is driving. 

The circuitry automatically recognizes the impedance characteristics of the 

loudspeaker and  will then adjust its power supply settings to best cope with 

that specific load.

NAD takes a stance to the mindless “brochure power” approach which doesn’t 

give a realistic indication of an amplifier’s true capabilities. Instead, the ISC 

topology is a practical approach to enable an amplifier to easily deal with 

dynamics and difficult loads. More meaningful are the T770’s dynamic 

capabilities; up to 300 Watts into 2 ohms and up to 40 amps current capability.

Whereas it is widely accepted with CD players that the digital and analog 

circuitry play a vital role in the performance, it appears that many AV 

receivers employ only mediocre signal conversion and processing 

circuits. For the T770 the engineers choose the best available within the 

budget: Burr-Brown DACs with 18-bit resolution. The two DSP chips that 

handle the Dolby Digital, Dolby Pro Logic, EARS and other Surround 

Modes chosen, are from the well renowned Motorola 56000 family. The 

combination of these components ensure that the integrity of the original 

signal retains its full resolution and dynamics.

Flexibility

As one would expect from any NAD component, the Model T770 offers 

great flexibility; 5 video and 4 audio inputs allow you to connect all your 

sources with ease. All video in and outputs are S-Video and Composite 

compatible, including the video input on the front panel.

Besides these "normal" inputs, the T770 also sports an external decoder 

(5.1 channel) input so you can easily expand your receiver in the future 

with an outboard decoder for another surround sound format, such as DTS, 

for instance. 3 Digital inputs are provided, to cater for every eventuality: 

A coaxial digital input, an input with a RF demodulator integrated and a TOS 

Link for sources with optical outputs. Whether it' a Laserdisc, CD and/or 

DVD player, the T770 will connect to it. With pre-amplifier outputs for all 

channels you can easily upgrade your output power too.

To ensure long-term contact reliability, all speaker terminals are of the 

robust binding post variety rather than the usual spring clips and all other 

audio sockets are gold plated.

The remote control handset supplied with the Model T770 also has controls 

for NAD CD players or changers and a (dubbing) cassette deck. With NAD 

Link it is possible to remote control other NAD products which do not have 

their own remote control (NAD Cassette Deck Model 616, for instance ) 

from the T770’s remote control.