7020i Stereo
Receiver Features:
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-coilmotion 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 allspeaker wires and banana plugs.
Flexibility: the 7020i's 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 theperson who wants fine musical reproduction without becoming
involved in the technicalities of hi-fi. NAD's 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
inweak 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
Circuit
Features High-Current Output Stage
NAD was the
first manufacturer to emphasise the importance of output current capacity. The
7020i candeliver 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.
Impedance
Selector
NAD's 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 Ω impedance safely, without current-limiting or distortion.
Soft
Clipping™
When the
7020i is overdriven beyond its power capacity, the exclusive NAD Soft Clipping™
circuit gently limits the waveform voltage so that the output transistors are
never driven into saturation, i.e. into"hard clipping". Thus the
receiver can safely be over driven substantially beyond its rated power on
peaks, yet still continue to sound smooth and musical.
Digital-ready
Dynamic Range
The 7020i's
over-load- proof inputs for video, tape and digital Compact Disc can accommodate a dynamic range greater than
100 dB. Every circuit in the receiver, including its low-impedance tone-control
stage, is designed to minimise background noise
and preserve the clarity of your recordings.
Unlike many
receivers that employ low-cost integrated-circuit (IC) chips for the phono
stage, the NAD 7020i employs a refined discrete-transistor phono preamplifier
circuit whose signal-to-noise ratio is sogood (75 dB with the phono cartridge
connected) that you won't hear any preamp hiss, even when playing the quietest
recordings.
Musically
Useful Tone Controls
Correctly
designed tone controls can be a genuinely helpful aid to enjoyable music
listening. In the NAD 7020i, the bass and treble controls do what their names
imply: they allow you to vary the strength ofthe bass and the treble. But at
moderate boost/cut settings the important midrange from 300 to 1500 Hz remains
essentially flat.
Sensitive
Digital Tuning
The 7020i
employs precise frequency-synthesis digital tuning; each station is tuned with
crystal-controlled accuracy. A dual-gate MOSFET FM circuit pulls in weak
stations well but resists overloading on strong signals, Multi-stage I.F.
filtering provides an optimum combination of sharp selectivity (to separate
closely-spaced stations) and minimum distortion of the stereo signal.
Quiet AM
tuning
The AM
section is based on an IC that was especially developed for use in digital
tuners, It is surprisingly sensitive, unusually resistant to noise, and
provides a more extended high-frequency range than in mostother AM tuning
circuits.
PRE-AMP
SECTION
Phono Input
Input
Impedance (R and C): 40 k Ω (100 pF)
Input
Sensitivity (1 kHz): 2,4 mV ref. 20 W
Signal-to-Noise
Ratio (A-weighted with cartridge connected):
75 dB ref.5 mV
Total
Harmonic Distortion (20 Hz - 20
kHz): less than 0,04%
RIAA
Response Accuracy (20 Hz - 20 kHz): ±0,5
db
Line Level
Inputs
Input
Impedance (R and C): 40 k Ω (100pF)
Input
Sensitivity (ref. 20W): 150 mV
Maximum
Input Signal: better than 10 V
Signal-to-Noise
Ratio (A-weighted ref 1W): 84 dB
Frequency
Response : 20 Hz - 20 kHz, +0,5 dB; -1,0 dB
Infrasonic
Filter: -3 dB at 15 Hz, 24 dB/oct
Line Level
Outputs
Maximum
Output Level/Output Impedance:
Tape : 10 V / source Z ÷ 1 k Ω
Phones Max.
Output Level :
Better than
10 V into 600 Ω
Better than
500 mV into 8 Ω
Phones
Output Impedance: 220 Ω
Tone
Controls
Treble
: ±7 dB at 10 kHz
Bass : ±10 dB at 50 Hz
POWER AMP
SECTION
Continuous
Output Power into 8 Ω: 20 W (13 dB W)
Rated
Distortion (THD 20Hz - 20kHz): 0,03%
Clipping
Power (maximum continuous power per channel):
25 W
IHF Dynamic
Headroom at 8 Ω : +2,5 dB
IHF Dynamic
Power (maximum short term power per channel):
At 8 Ω
: 35 W (15,5 dB W)
At 4 Ω
: 35 W (15,5 dB W)
At 2 Ω
: 50 W (17 dB W)
Damping
Factor(ref. 8 , 50 Hz): better than 30
Input
Sensitivity (for rated power into 8
Ω): 900 mV
FM TUNER
SECTION
Input
Sensitivity:
Mono -30 dB
T.H.D.÷N : 11,3 dBf (2,0 µV/300 Ω)
Mono 30 dB
S/N : 15 dBf 93,0 µV/300 Ω)
Stereo 50 dB
S/N : 37 dBf (40 µV/300 Ω)
Stereo 60 dB
S/N : 47 dBf (120 µV/300 Ω)
Capture
Ratio (45 - 65 dBf): better than 1,5 dB
AM Rejection
(45 - 65 dBf): better than 60 dB
Selectivity
(Alternate Channel): 58 dB
Image
Rejection: 70 dB
I F
Rejection: 90 dB
Harmonic
Distortion [mono/stereo]: 0,1% / 0,1%
Signal-to-Noise
Ratio [mono/stereo]: better than 80 dB/ better than 74 dB
Frequency
Response: 30 Hz - 15 kHz, ±0.5dB
Channel
Separation at 1kHz: 45 dB
AM TUNER
SECTION
Usable
Sensitivity: 5 µV
Selectivity: 30 dB
Image
Rejection: 45 dB
I F
Rejection: 35 dB
Signal-to-Noise
Ratio: 45 dB
Harmonic
Distortion: 0,5%
PHYSICAL
SPECIFICATIONS
Power
Supply: 120 ~ 240 V, 50/60 Hz
Power
Consumption: 150 W
Dimensions
(W x H x D): 420 x 91 x 273 mm
Net
/Shipping Weight : 5,5 / 6,8 kg
Nessun commento:
Posta un commento