Hi Fi audio sistem NAD - KEF / C440 C540 317 KEF C10 za gurmane zvoka

TUNER NAD C440
CD PREDVAJALNIK NAD C540
OJAČEVALNIK NAD 317
ZVOČNIKA KEF C series, type SP3057, 60W 8 Ω, C10

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TUNER C440
8 Character preset naming capability • Easy & straightforward to use
• 30 Station random presets (AM or FM) in 3 banks
• 25 kHz tuning steps • NAD Blend • VFL display
• MOS-FET RF section and Front-End • NAD-Link for remote control capability
Tuners tend to be swamped with buttons nowadays, obliterating ease-ofuse. With the NAD Model C 440 get the intuitive, simple operation that
tuners used to offer but combined with the convenience of modern day
technology. Apart from convenience, the C 440 also offers the excellent
performance NAD tuners are acclaimed for.
Features
With 30 presets available you can store all your favorite radio stations.
These presets can be any combination of AM and FM stations: 25 presets
for FM and 5 for AM, or 17 for FM and 13 for AM, for instance. To avoid
having to scroll through 30 presets, the un-programmed (empty) ones are
skipped to give you quick access to all your favorite stations. You can
store the presets in any of the three different banks, labeled A, B or C.
This way you can organize the presets to suit personal preferences (for
example; his or hers or program type: rock, classical music, news, etc.).
When attempting to listen to weak stations, sometimes the background
noise can become annoying and spoil the listener's enjoyment of the
program. The BLEND function reduces this noise while still retaining
adequate stereo separation.
Instead of littering the front panel with buttons and features that are hardly
ever used, the NAD Model C 440 concentrates on convenience in daily
operation.
The C 440 will allow you to individually name each preset with up to
8 characters. Once you have named your presets you don't need to
remember which frequency goes with what radio station, the
name is indicated in the display every time the preset is recalled.
All the preset information is stored in the C 440's non-volatile memory,
which means it will remember all of its preset information even if the unit
has been unplugged for a prolonged amount of time.
Thanks to NAD-Link the Model C 440 can be remote controlled by one of
NAD's universal remote controls which come supplied with other NAD
equipment which sports NAD-Link.
Apart from ease-of-use, the NAD Model C 440 also offers features to get the
maximum out of the airwaves. Auto Search automatically stops at the next
strong radio signal it comes across and optimizes tuning. Weaker radio
stations can be tuned into manually.
Design
The MOS-FET RF section and Front End design together with high quality
components and careful PCB lay-out guarantees excellent sensitivity with
low intermodulation distortion to provide noise-free reception. Although
AM can never reach the quality of any FM transmission, the Model C 440's
AM section retains excellent clarity together with low background noise.
The Model C 440 offers performance, simplicity and value that NAD is so
renowned for.
PRELIMINARY SPECIFICATIONS - NAD C 440
Appearance and features are tentative.
NAD reserves the right to change specifications or design at any time without notice. All specifications are those in effect at time of printing.
Printed in Canada.
17.1875" x 3.1875" x 11.4375"
(435 x 80 x 290mm)
7.7lbs (3.5kg)
9.9lbs (4.5kg)
FM Tuner Section
Usable input sensitivity FM Mono 11.2 dBf, 1.0 μV, IHF, 0.9 μV, DIN
FM Stereo 17.2 dBf, 2.0 μV, IHF, 20 μV, DIN
50 dB Quieting sensitivity FM Mono 16.1 dBf, 1.7 μV
FM Stereo 36.1 dBf, 20 μV
Capture Ratio (FM) 2.5 dB
Image Rejection 95 dB
IF Rejection FM Mono 76 dB
FM Stereo 70 dB
Harmonic Distortion FM Mono 0.1%
FM Stereo 0.15%
Channel separation @1kHz >45dB
Frequency Response ± 1.5 dB 30Hz - 15 kHz
AM Tuner Section
Usable Sensitivity 10 μV
Selectivity 30 dB
Image Rejection 32 dB
IF Rejection 40 dB
Signal / Noise Ratio 40 dB
Harmonic Distortion 0.7%

NAD ENGLAND CD C 540
The DAC inside is a Burr Brown PCM1716E , 24 bits, 96KHz
Quote from the data sheet : The PCM1716 is designed for Mid to High grade Digital Audio applications which achieve 96kHz sampling rates with 24-bit audio data. PCM1716 uses a newly developed, enhanced multi-level delta-sigma modulator architecture that improves audio dynamic performance and reduces jitter sensitivity in actual applications.
The NAD did aproach a very interesting implementation.
Digital converter: Sigma Delta, 24 bit, 8 x oversampling
Frequency response: 5Hz to 20kHz
Dynamic range: 96dB
Signal to Noise Ratio: 108dB
Channel separation: 80dB
Total harmonic distortion: 0.0035%
Line output: 2.2V
Digital connections: coaxial
Dimensions: 435 x 70 x 285mm
Weight: 4.1kg

NAD 317
Stereo Integrated Amplifier
The model 317 integrated amplifier uses an identical power amplifier circuit to the 214 power amplifier.
The unit has 6 line inputs, including 2 tape in/outputs with dubbing facilities.
By removing the links between the pre-out and main-in sockets the pre-amplifier section can be separated from the power amplifier for easy upgrades.
Remote control
Pre out / Main in
All discrete circuitry
Tone controls defeat switch
Bridgeable to give 240W into 8 Ohms
Input switching through relays with gold plated contacts
Soft clipping
Specifications
Power output: 80 watts per channel into 8Ω (stereo)
Frequency response: 20Hz to 20kHz
Total harmonic distortion: 0.03%
Damping factor: 200
Input sensitivity: 165mV (line)
Signal to noise ratio: 104dB (line)
Dimensions: 435 x 128 x 383mm
Weight: 12.1kg
Year: 1997
Price: GBP £470 (1997)


KEF C10
The C10, the smallest of the series, and the C20, the next up, are both intended to be used against a wall or on a shelf; they have a deliberate step in their frequency response to equalize the results when so placed in what KEF have termed the 'boundary' condition. The free support at low frequencies when they are only required to radiate into a hemisphere, as opposed to 'out in the room', has given a useful overall lift to the apparent efficiency. The C10 uses a B160 bass/mid-range unit (140mm cone) with a free-air resonance of 55Hz, rising to 100Hz in the sealed box which is liberally filled with bonded acetate fibre wadding. A pressed metal frame and ceramic magnet are used. The crossover to the tweeter at around 2.8kHz is carried out by seven components on a printed circuit board (the same one is used for all models) which is anchored straight to the studs of the rear terminals. A series capacitor of 600μF provides an additional pole to the low-frequency network, and this not only improves the low-end performance but protects the unit from switching thumps or pickup mishandling; it also means that there is no DC path through the loudspeaker, which has perturbed quite a number of uninformed engineers prodding away with their test meters.

Listening tests showed most clearly that there is much to be gained by trying different positions for this junior model. Often a few centimeters made a considerable difference to the results; on stands, against a plain wall, with about 50mm spacing, seemed optimum. This done, the final sound was very satisfactory and this cheapest of the C Series must rank as one of the most desirable in the range. Critically one finds a slightly boxy character to the sound, traces of nasality in reproduced speech and an occasional exaggeration of sibilance. On the plus side, it stood up to high power very well-even in the bass, which sounds as though it goes much lower than it really does when used against a wall, in which situation it gives few clues to its small size and low price.
System type 2-way
Enclosure type Closed box
Frequency response ± 3dB 90 - 20000 Hz
Nominal impedance 8 Ohm
Amplifier Requirements 10 - 60 W
Sensitivity (2.83V/1m) 88 dB
Maximum output (SPL) 106 dB
Tweeter 33 mm (1-5/16 in.)
Woofer 160 mm (6.3 in.)
Dimensions (H x W x D) 300 x 205 x 172 mm / 11.81 x 8.07 x 6.77 in.