Nad 7020E Users Manual

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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note that this document contains the text from the original product brochure, and some technical statements may now be out of date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.

© NAD Electronics. All rights reserved. E & OE