NAD 7140


NAD 7140


The mid to late 1980's saw a transition toward cheaper less robust audio components mostly made of plastic. During that transition there were some interesting receivers made by companies such as NAD. This NAD 7140 receiver is a good example. Produced from 1987 through late 1989 is is a high quality stereo that moved away from the shiny brushed aluminum faceplates and beveled knobs so popular in the 1970's and very early 1980's. It retailed for $478.00.


NAD 7140 Display


The build quality and circuit design is excellent and, best of all, it can accommodate tape, phono and CD. The phono input can be switched from MM to MC as well.  The rating of 80 watts per channel is conservative and NAD's amp circuit is designed with a lot of headroom. There is a switch on the back to adjust for speaker impedance and the 7140 will provide 40 watts per channel at 2, 4, and 8 ohms.

NAD also utilizes what they call Soft Clipping. It is also controlled by a switch on the back panel. Soft Clipping limits the waveform when the amplifier is driven beyond its capacity thereby reducing harshness and distortion at high volume levels.


NAD 7140 Power


The Bass EQ button provides a 6dB boost at 32Hz for speakers lacking that extra punch. NAD explains their Infrasonic Filtering control as follows:

Infrasonic filtering is included to eliminate signal contamination from turntable rumble, record warps, tonearm/stylus resonances, vibration and acoustic feedback. This guarantees the cleanest possible handling of signals within the audible range and eliminates the excessive woofer-cone excursions that can cause inter modulation distortion and muddy bass in systems with-out filtering.

The IF can be turned off via the Infra Defeat button on the front panel.


NAD 7140 Inputs


The NAD 7140 entered the market at the beginning of the Compact Disc era and was designed with the CD in mind. Its 102 dB signal to noise ratio and 3 dB of IHF Dynamic Headroom allow undistorted reproduction of transient bursts from CD's or digitally recorded sources.

The 7140's FM tuner is fantastic and the AM tuner isn't bad either. Overall it's just a great receiver.

One stereo reviewer said:

The performance of the NAD 7140 is difficult to criticize. In fact, it is so outstanding, in so many respects, that there is a real danger of our lapsing into fulsome praise instead of offering genuine criticism. Let us say only that its FM tuner is one of the most sensitive we have had the pleasure of using-in a meaningful sense, such as its exceptional stereo 50-dB quieting sensitivity. The signal-to-noise ratio is also exceptional. The tuner's other characteristics are equally impressive, ranging from good to outstanding, and it had no weaknesses that we could discover. Even the AM section had an unusually wide and flat response.

The stereo measures 16 1/2 inches wide, 13 3/4 inches deep, and 4 inches high, and weighs in at just over 20 pounds.


NAD 7140 Parts

Overall the NAD 7140 is a great receiver. It is built well and can accommodate multiple input sources. If you want to run a CD player, a turntable and even a reel to reel and still have an AUX input open for an MP3 player then the NAD 7140 may be for you.  It has had some issues with the digital display failing but this can be fixed.

One of the nice aspects of the 7140 is that it isn't very expensive. Fully restored units sell for $200 while good working units sell for around $100-150.

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NAD Model 160



You've most likely heard of this audio manufacturer before but still may not recognize the name on the faceplate. This is the New Acoustic Dimension Model 160 receiver which was made from 1975 up until around 1979. You may be more familiar with the name NAD. Of course, in the U.S. NAD is most known for their 3020 integrated receiver which sold very well here. Earlier models such as this 160 and the later 160A were sold mostly in Europe and are not often seen in the states.


NAD Model 160


New Acoustic Dimension was started in England in 1972 by Martin Borish. His vision was to create components that weren't overloaded with features that people wouldn't really use. This gave NAD's products, especially the late 1970's and 80's models, a very streamlined look. You'll see a couple different variations on the faceplates with some having New Acoustic Dimension at the top left and the Model on the top right while others have NAD and the model at the top left and Stereo Receiver at the top right. Some of the lettering is green and other times it is black. Inside they are the same.




NAD produced the models 120, 140, 160, and 300 during the mid 70's. The 120 had 25 watts per channel, the 140 35 watts, the 160 50 watts and the 300 was at the top of the line with 100 watts per channel. These units were all very well designed and built. They have some cosmetic similarities to the Marantz models of the time with the lettering and push buttons. Similar toYamaha in the way the wood case butts up against the faceplate. NAD was actually one of the first audio companies to start outsourcing production of their units to Japan.


NAD Model 160A
NAD Model 160A


Mechanically the Model 160 does have an issue with the power supply which is susceptible to overheating. This however is an easy fix as it is usually one of the large resistors on the power supply board. Notice also, that the Aux input is a DIN so don't expect to be running your iPod through this unit unless you have an adapter. Note also that it has only one phono input on the back. The Model 160 has no Loudness function but in the later Model 160A the Muting button was replaced with a Loudness button.




NAD grew rapidly when they introduced the 3020 which sold over a million units during its production run from 1979 to 1993. But, it's these older models that are very hard to find for collectors. While these units are very well built and perform nicely they are still sleepers. Nice units can be purchased for around $100.

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