NAD 7400 User Manual (English)

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7400

Stereo Receiver

Date of manufacture : ? - Nov 89

Please note that this document contains the text from the original product brochure, and some technical statements may now be out of date

The 7400 Receiver (composed of circuitry from the 2400 Power Amp and 1700 Preamplifier/Tuner) was

designed according to the same principles as the 7l00, but it is approximately twice as powerful and has

additional refinements, including semi-parametric tone controls and convenient analogue style knob

tuning.

While the 7400 is conservatively rated at 100 watts per channel continuous power for test tones, its

Power Envelope circuit produces upwards of 370 watts per channel of long-term dynamic power for

music, with a peak current of 40 amperes for precise control of voice-coil motion with speaker

impedances as low as 2 ohms. For still more power, a rear-panel bridging switch converts the output

stage into a mono amplifier rated at 200 watts continuous power and 800 watts of tone-burst power

for music, The companion 2400 Power Amplifier may be added for stereo.

Semi-parametric tone controls combine the the simplicity of ordinary bass and treble controls with the

flexibility of a two-band parametric equaliser. Bass EQ) strengthens the deep bass while infrasonic

filtering prevents muddy intermodulation distortion. Ultra-quiet line-level circuits, including a feedback-

operated volume control that reduces noise as its gain is lowered, provide a signal/noise ratio exceeding

that of any source, analogue or digital. Dual tape circuits (with independent two-way dubbing and

monitoring and external preamp-out/main-in connections make it easy to upgrade your system at any

time with an equaliser, surround-sound processor, or electronic crossover.

The sensitive and quiet tuner section of the 7400 is controlled by a rotary tuning knob and 14 presets,

combining the natural, intuitive feel of analogue tuning with the precision of digital frequency-synthesis.

Automatic station-seek tuning is included on the remote control. FM NR, selectable I.F. bandwidth, and

numerous internal refinements provide surprising station-pulling power and satisfying sound under

widely varying reception conditions.

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