NAD Electronics 7400 User's Manual
Contents
1. 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note that this document contains the text from the original product brochure and some technical statements may now be out of date The 7400 Receiver composed of circuitry from the 2400 Power Amp and 1700 Preamplifier Tuner was designed according to the same principles as the 7100 but it is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 rati2. amping factor ref 89 50Hz Input impedance Input sensitivity for rated power into 8Q Frequency response Signal noise ratio THD 20Hz 20kHz Bridged Mode Continuous output power into 8Q IHF Dynamic headroom at 8Q IHF dynamic POWEF maximum short term power per channel NAD Electronics All rights reserved E amp OE Pre amp Tape ref 1W ref rated power 80 4 47kQ 120pF 47KQ 120pF 0 28mV ref 1W 0 02mvV ref 1W 76cB ref 5mV 76cB ref 5mV lt 0 04 0 5dB 50kQ 250pF 15mV gt 10V 96dB 0 3dB 6002 Source Z 1kQ gt 10V 12dB at 3 6 or 12kHz 12dB at 50 120 or 250Hz 3dB at 60Hz 6dB at 36Hz 3dB at 12Hz 12dB octave 100W 20dBW 0 03 130W 5 7dB 370W 25 7dBW 400W 26dBW 440W 26 4dBW gt 100 20kQ 600pF 1V 3Hz 100kHz 0 3dB 98dB 118dB lt 0 03 200W 23dBW 6dB 800W 29dBW 880W 29 4dBW FM TUNER SECTION Input sensitivity Capture ratio 45 65dBf AM rejection 45 65dBf Selectivity alternate channel Selectivity adjacent channel Image rejection F rejection Harmonic distortion Signal Noise ratio Frequency response 0 5dB Channel separation at 1kHz AM TUNER SECTION Usable sensitivity Selectivity Image rejection F rejection Signal Noise ratio Harmonic distortion Remote NAD Link PHYSICAL SPECIFICATIONS Dimensions W x H x D Net weight Shipping weight Power consumption 120 240V 50 60Hz Mon
3. o 30dB THD N Mono 50cB S N Stereo 50dB S N Stereo 60dB S N Mono Stereo Mono Stereo Minimum power per chnnel 20Hz 20kHz both channels driven with no more than rated distiortion Dimensions are of unit s cabinet without attached feet add up to 18mm for total height Dimension depth excludes terminals sockets controls and buttons NAD Electronics All rights reserved E amp OE 10 3dBf 0 9uV 75Q 13dBf 1 2UV 75Q 25dBf 5yuV 75Q 35dBf 15uV 75Q lt 1 5dB gt 65dB 75d0B 7dB gt 90dB gt 100dB 0 08 0 08 82dB 78dB 30Hz 15kHz 50dB 300pV 35dB 50dB 50dB 45dB 0 5 Yes No 435 x 120 x 390mm 11 8kg 13 6kg 390VA
4. o 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 PRE AMP SECTION Phono input Input impedance Rand 9 Input sensitivity 1kHz Signal Noise ratio A weighted with cartridge connected THD 20Hz 20kHz RIAA response accuracy 20Hz 20kHz Line level inputs Input impedance Rand 9 Input sensitivity ret 1m Maximum input signal Signal Noise ratio a weighted ref 1 Frequency response 20Hz 20kHz Line level outputs Output impedance Maximum output level Tone controls Treble Bass Bass EQ Infrasonic filter switchable POWER AMP SECTION Continuous output power into 8Q Rated distortion THD 20Hz 20kHz Clipping POWEF maximum continuous power per channel IHF Dynamic headroom at 8Q IHF dynamic pOWETr maximum short term power per channel D
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