NAD Stereo Receiver 7020i User Manual

70 20 i Stereo Receiver  
Date of manufacture : Feb 90 - ?  
Please note that this document contains the text from the original product brochure, and some technical statements may now be out of date  
Conservatively rated at 20 W/channel continuous power, with +3 dB of IHF Dynamic Headroom.  
Dynamic power exceeds 40 W/channel at 8 or 4 ohms, 50 W/ channel at 2 ohms.  
High-current output stage delivers peak currents up to 15 amperes, for precise control of voice-coil  
motion with speaker impedances as low as 2 ohms.  
Gold-plated phono input jacks for a long life of corrosion-free contact in this sensitive low level signal  
path.  
Heavy duty speaker binding-post connections provide a secure, low resistance connection for all  
speaker wires and banana plugs.  
Flexibility: the 7020is pre and power amplifier are connected by external jumpers which are  
removable to allow for greater flexibility to upgrade your system.  
Sensitive precise digital tuning with three stages of I.F. filtering for outstanding freedom from noise  
and interference.  
The modest cost and simple controls of the NAD 7020i Stereo Receiver make it an ideal choice for the  
person who wants fine musical reproduction without becoming involved in the technicalities of hi-fi.  
NADs approach to audio design can be characterised in one phrase: “high-value engineering”. When  
you choose an NAD receiver, you are investing in quality behind the front panel . innovative circuit  
design, selected parts, high-current transistors, exacting quality control, and solid construction for  
consistent performance and long-term reliability.  
The rated “continuous” power of a receiver tells you how well it plays sine-wave test tones; but real  
musical waveforms are much more complex and dynamic. The NAD 7020i is conservatively rated at 20  
watts per channel for test tones, but its high-voltage design produces extra power for rapidly changing  
waveforms -over 40 watts per channel of dynamic power for the exciting peaks and climaxes in music  
(especially in digital Compact Discs).  
Many FM receivers look good on paper; but in side-by- side comparisons, NAD receivers often pull in  
weak or difficult stations with audibly better freedom from noise and interference, thanks to sensitive  
dual-gate MOSFET amplification and sophisticated multi-stage I.F. filtering.  
Circu it Fe a t u re s Hig h -Cu r re n t Ou t p u t St a g e  
NAD was the first manufacturer to emphasise the importance of output current capacity. The 7020i can  
deliver peak currents as high as 15 amperes. The “20-watt” 7020i employs the same high-speed output  
transistors that other manufacturers use in their 50-watt” receivers.  
Im p e d a n ce Se le ct o r  
NADs unique Speaker Impedance selector and high-current output stage deliver maximum power to  
loudspeakers of any impedance - high or low, simple or complex. The 7020i will even drive a 2 ohm  
impedance safely, without current-limiting or distortion.  
 
P RE-AM P SECTION  
Phono input  
Input impedance (R and C)  
Input sensitivity, 1kHz  
Signal/Noise ratio (A-weighted with cartridge connected)  
THD (20Hz - 20kHz)  
47k/ 100pF  
2.4mV ref. 20W  
75dB ref. 5mV  
<0.04%  
RIAA response accuracy (20Hz - 20kHz)  
±0.5dB  
Line level inputs  
Input impedance (R and C)  
Input sensitivity (ref. 20W)  
Maximum input signal  
Signal/Noise ratio (A-weighted ref 1W)  
Frequency response (20Hz - 20kHz)  
Infrasonic filter  
40k/ 100pF  
150mV  
>10V  
84dB  
+0.5dB, -1.0dB  
-3db at 15Hz, 24dB/octave  
Line level outputs  
Output impedance  
Tape Source Z + 1kΩ  
Phones 220Ω  
Maximum output level  
Tape 10V  
Phones >10V into 600Ω  
>500mV into 8Ω  
Tone controls  
Treble  
Bass  
±7dB at 10kHz  
±10dB at 50Hz  
P OW ER AM P SECTION  
Continuous output power into 8*  
Rated distortion (THD 20Hz - 20kHz)  
20W (13dBW)  
0.03%  
Clipping power (maximum continuous power per channel)  
IHF Dynamic headroom at 8Ω  
25W  
+2.5dB  
835W (15.5dBW)  
435W (15.5dBW)  
250W (17dBW)  
>30  
IHF dynamic power (maximum short term power per channel)  
Damping factor (ref. 8, 50Hz)  
Input sensitivity (for rated power into 8)  
900mV  
FM TUNER SECTION  
Input sensitivity  
Mono -30dB THD+N 11.3dBf (2.0µV/300)  
Mono 30dB S/N 15dBf (3.0µV/300)  
Stereo 50dB S/N 37dBf (4V/300)  
Stereo 60dB S/N 47dBf (120µV/300)  
Capture ratio (45 - 65dBf)  
AM rejection (45 - 65dBf)  
Selectivity, alternate channel  
Image rejection  
<1.5dB  
>60dB  
58dB  
70dB  
I F rejection  
90dB  
Harmonic distortion  
Mono 0.1%  
Stereo 0.1%  
Mono >80dB  
Stereo >74dB  
30Hz - 15kHz  
45dB  
Signal/Noise ratio  
Frequency response ±0.5dB  
Channel separation at 1kHz  
AM TUNER SECTION  
Usable sensitivity  
Selectivity  
Image rejection  
I F rejection  
5µV  
30dB  
45dB  
35dB  
45dB  
0.5%  
Signal/Noise ratio  
Harmonic distortion  
Remote  
NAD Link  
No  
No  
P HYSICAL SP ECIFICATIONS  
Dimensions (W x H x D)  
Net weight  
420 x 91x 273mm  
5.5kg  
Shipping weight  
6.8kg  
Power consumption (120 ~ 240V, 50/60Hz)  
150W  
* Minimum power per chnnel, 20Hz - 20kHz, both channels driven with no more than rated distiortion.  
Dimensions are of units 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 & OE  
 

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