NAD 7020e User manual

7020e Stereo Receiver
Date of manufacture : ? - Dec 89
Please note that this document contains the text from the original product brochure, and some technical statements may now be out of date
NAD’s product philosophy can be characterised in one phrase: “high-value engineering.” The compact
and economical 7225PE receiver is an outstanding example of that approach; it contains much of the
same circuitry as the 7240PE, with less output power and a substantial saving in cost
In budget-level stereo receivers, performance and power often are compromised to reduce production
cost. But NAD combines high production efficiency with superior performance by using the same circuits
in both separates and receivers. The 7225PE contains the entire 3225PE integrated amplifier plus a
sensitive, wide-range digital tuner.
The 7225PE is conservatively rated at 25 watts/ channel of steady-state power for sine-wave test tones
But with +4 dB of IHF dynamic headroom, its effective power for musical transients is considerably
greater. Power Envelope design produces bursts of up to 60 watts/channel at 8 ohms and 8 0
watts/channel at 4 or 2 ohms, ensuring clear and authoritative reproduction of the impact and sparkle
of live music. If you ever overdrive the 7225PE, Soft Clipping™ will prevent the harshness and gritty
distortion that is caused by hard clipping in conventional amplifiers.
NAD’s impedance selector allows optimum performance to be delivered into any speaker impedance
The 7225PE produces up to 15 amperes of peak current, delivering full power to impedances as low as
2 ohms. The quiet phono stage and wide-range line-level circuits, like those in the 7240PE, transparently
reproduce even the subtlest detail of every recorded sound. Infrasonic and ultrasonic filters eliminate
unwanted interference while preserving accurate response from 20 Hz to 20 kHz. Musically effective
tone controls adjust the deep bass and high treble without sacrificing clarity or midrange accuracy
Radio is not just for background music, and tuner performance should not be compromised. The
7225PE employs much of the same highly-evolved technology as the NAD 4225 tuner. A sensitive
MOSFET front end, three stages of I. F. filtering, and a PLL multiplex decoder for wide stereo separation,
provide an optimum combination of good selectivity and low distortion. In side-by-side comparisons
with other receivers, the 7225PE often pulls in weak or difficult stations with noticeably better clarity
and quieting.
NAD 7020 e Stereo Receiver The 7020e, NAD’s lowest cost receiver, is similar to the 7225PE in features
and performance, except that it is based on the 3020i integrated amplifier. It is rated at 20 watts per
channel of steady-state power with +3 dB of IHF dynamic headroom, meaning that in musical transients
it produces up to 40 watts/channel of dynamic power at 8 or 4 ohms
The 7020e shares with all NAD amplifiers and receivers a high-current output stage that, when playing
music instead of test tones, delivers full power to speakers of any impedance. Its combination of
dynamic power, Soft Clipping™, and unconstricted output current give the 7020e a characteristic ability
to drive even “difficult” speakers to unexpectedly high volume levels.
In addition to its surprisingly potent speaker-driving ability, the 7020e contains the same quiet phono
circuitry, sensitive digital tuning, wide stereo separation, sharp audio-bandpass filtering, and musically
useful tone controls that larger NAD receivers employ. The 7020e is a no-compromise product,
characterised by the high-value engineering that stands behind every NAD product.

PRE-AMP SECTION
Phono input
Input impedance (R and C) 47kΩ/ 100pF
Input sensitivity, 1kHz 2.4mV ref. 20W
Signal/Noise ratio (A-weighted with cartridge connected) 75dB ref. 5mV
THD (20Hz - 20kHz) <0.04%
RIAA response accuracy (20Hz - 20kHz) ±0.5dB
Line level inputs
Input impedance (R and C) 40kΩ/ 100pF
Input sensitivity (ref. 20W) 150mV
Maximum input signal >10V
Signal/Noise ratio (A-weighted ref 1W) 84dB
Frequency response (20Hz - 20kHz) +0.5dB, -1.0dB
Infrasonic filter -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 ±7dB at 10kHz
Bass ±10dB at 50Hz
POWER AMP SECTION
Continuous output power into 8Ω* 20W (13dBW)
Rated distortion (THD 20Hz - 20kHz) 0.03%
Clipping power (maximum continuous power per channel) 25W
IHF Dynamic headroom at 8Ω+2.5dB
IHF dynamic power (maximum short term power per channel) 8Ω35W (15.5dBW)
4Ω35W (15.5dBW)
2Ω50W (17dBW)
Damping factor (ref. 8Ω, 50Hz) >30
Input sensitivity (for rated power into 8Ω)900mV
FM TUNER SECTION
Input sensitivity Mono -30dB THD+N 11.3dBf (2.0µV/300Ω)
Mono 30dB S/N 15dBf (3.0µV/300Ω)
Stereo 50dB S/N 37dBf (40µV/300Ω)
Stereo 60dB S/N 47dBf (120µV/300Ω)
Capture ratio (45 - 65dBf) <1.5dB
AM rejection (45 - 65dBf) >60dB
Selectivity, alternate channel 58dB
Image rejection 70dB
I F rejection 90dB
Harmonic distortion Mono 0.1%
Stereo 0.1%
Signal/Noise ratio Mono >80dB
Stereo >74dB
Frequency response ±0.5dB 30Hz - 15kHz
Channel separation at 1kHz 45dB
AM TUNER SECTION
Usable sensitivity 5µV
Selectivity 30dB
Image rejection 45dB
I F rejection 35dB
Signal/Noise ratio 45dB
Harmonic distortion 0.5%
Remote No
NAD Link No
PHYSICAL SPECIFICATIONS
Dimensions (W x H x D) 420 x 91x 273mm
Net weight 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 unit’s cabinet without attached feet; add up to 18mm for total height.
Dimension depth excludes terminals, sockets, controls and buttons.
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