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THE MODEL 7130 RECEIVER FROM [NAD]
The NAD 7130 Digital AM/FM Stereo Receiver
NAD's approach to audio product design can be characterized in one phrase-"high value engineering,"-delivering audibly superior performance at modest cost. The NAD 7130 receiver exemplifies this approach perfectly.
The amplifier section is based on the classic NAD amplifier that has won worldwide praise for its accuracy, musicality and seemingly effortless power. The FM tuner section of the 7130 is based on the new generation of NAD tuners that are setting standards for clean, quiet FM sound at modest cost. Together they form a robust, easy-to-use stereo receiver whose modest price makes it an attractive choice for the first time stereo buyer, but with uncompromised performance that will satisfy experienced audiophiles as well.
Designed for Real World Performance.
The clean, uncluttered exterior of the NAD receivers is both a complement and a contrast to the expensive circuit components, massive power supply transformers, high power transistors and highly selective tuning circuits of the interior.
Thus while the moderately priced 7130 receiver is rated at 30 watts per channel in standard lab tests using an 8-ohm resistor, in actual listening comparisons it produces noticeably more solid and transparent sound at high levels than other "30 watt" units. This is because the 7130 has a high voltage, high current output circuit that delivers short term bursts of more than double the rated power into the impedance of a real loudspeaker. Furthermore, NAD's exclusive Soft Clipping circuit permits listening levels even beyond those limits, by minimizing audible distortion at high volume settings. The FM tuning section of the 7130 has a remarkable IHF sensitivity rating and in actual use it pulls in weak or difficult stations with audibly better freedom from noise and interference than other comparably rated receivers. This is due to its sophisticated three stage I.F. filtering and Dynamic Separation circuit.
Binding Post Speaker Terminals. Instead of the usual spring clips, heavy duty binding posts are used to ensure secure, low resistance connections for high current delivery with any type of speaker cable.
High Current Output Stage. The typically low and complex impedance of a loudspeaker requires much more output current from the amplifier than an 8-ohm test resistor would. The ability of the NAD 7130 '.o deliver such current with ease is reflected in its remarkably high Dynamic Power specification at impedances of 4 and even 2 ohms.
Impedance Selector. NAD's unique impedance selector matches the power supply to the speakers. One setting pro vides increased voltages for loudspeakers of 8 ohms or higher impedance. The other setting provides the lower voltage and high current needed to drive low impedances, such as 4-ohm speakers or two pairs of speakers playing together.
MOSFET FM Tuner. The low-noise, dual-gate MOSFET FM tuning circuit provides an optimum combination of sensitivity to weak signals and freedom from strong-signal overload.
Dynamic Separation. NAD's dynamic separation circuit cancels the out-of-phase portion of the high-frequency hiss that always accompanies weak FM stereo signals. It works by selectively blending the highs, but only in those stereo signals that are weak enough to need the extra quieting. The result is clean, quiet FM reception with subjectively wide separation at all times.
Linear Phase I.F. The tuner contains a total of three ultralinear ceramic I.F. filters that provide superb selectivity for interference rejection while maintaining uniformly wide stereo separation. The balanced quadrature detector ensures consistently low distortion, even with over-modulated signals.
CD Input. The 7130 receiver has a separate CD input (not merely a re named AUX input) for a Digital Compact Disc player. There is no input circuit that could be overloaded by high level peaks; the signal goes directly to the Volume control before it is amplified.
Moving Coil Input. A rear panel switch increases preamp sensitivity while maintaining extremely low noise. The 7130's MC input is audibly quieter than many others.
Video Input. Since this input won't be used up by your CD player, it remains available for other sources of stereo sound-such as a "HiFi" VCR, video disc player or stereo TV tuner.
Wide-Range Phono Preamplifier. The phono preamp section of the 7130 is a high precision discrete-transistor circuit whose performance matches that of far more expensive separate preamps. Its signal/noise ratio is close to the theoretical limit under real use conditions, i.e.: with a phono cartridge plugged in. The total dynamic range of the phono/preamp is approximately 106 db.
Specifications:
NAD 7130 Digital AM/FM Stereo Receiver
Note: Measurements referenced to 8 ohms are taken with the Speaker Impedance selector set to "80 (High)." Measurements for 4 and 2 ohms are taken with the impedance selector at "40 ( Normal)." Specifications are measured in accordance with EIA Standard RS-490 (IHF A-202) for amplifiers and ANSI-IEEE Standard 185(1975) (IHF T-200) for tuners. Tuner sensitivity is measured via 75-ohm coaxial input and converted to equivalent 300-ohm values.
Power Amplifier Section, Stereo Mode
CONTINUOUS AVERAGE POWER OUTPUT INTO 8 OHMS (min. RMS power per channel into 8 ohms, cU Hz-20 kHz, both channels driven, with no more than the rated distortion)
NAD MAKES HIGH PERFORMANCE AFFORDABLE.
Designed with a degree of thoughtfulness and care seldom found at this price level, the 7130 Stereo Receiver will drive the very best loudspeakers with ease and will do justice to the finest musical recordings.
NAD manufactures an entire line of home electronics, including stereo and video components, loudspeakers and accessories. Featured here is the 7130 receiver with the NAD 20 loudspeakers.
NAD ELECTRONICS
BOSTON/LONDON/TOKYO
( Audio magazine, May 1985)
Also see:
NAD Monitor Series CD player (ad, Feb. 1988)
NAD 6300 Monitor Series cassette deck (ad, Jan. 1988)
Onkyo DX-300 Compact Disc Player (Sept. 1984)
Revox B226 CD player (Apr. 1987)
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