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NAD C540 Cd Player www.nadelectronics.com
Its feature list includes:
Single disc CD Player with Full Function Remote Control Coaxial Digital output
Burr-Brown Sigma-Delta 24 bit Digital to Analog converter Low output impedance
Repeat mode for single track or entire CD Random play
Separate power regulators for analog and digital sections.
Informative VSL display with switchable track, time and repeat.
Over the years NAD has built up an enviable reputation for building fine CD players offering outstanding value for your money. The Model C540 will further enhance this reputation with its excellent performance and ease of use at a very keen price.
As always, sonic performance is the first priority at NAD. Rather than adding many seldom used features or going for "overkill" on a single aspect of the design, the NAD engineers have concentrated on the design itself to offer the best performance possible at the price. Behind the deceptively modest front panel lies some of the most sophisticated circuitry available.
Features
RANDOM gives the listener a random selection of all tracks on the disc in play and REPEAT allows repeat playing of the disc or individual tracks. Individual tracks are easily accessed by SKIP (Forward and Back). SCAN (Forward and Back) gives an audible review of individual tracks, giving the listener the opportunity to reach specific sections of the track. The understated yet comprehensive display gives the listener all the vital information required to access and enjoy the selected music. The track number is displayed and for those who regularly transfer CDs to cassette tape, the button displays the current time elapsed or remaining for complete CDs or individual tracks. A "calendar" type section in the display gives immediate visual information how many tracks in total there are on the CD.
The Model C540 comes supplied with a full function remote control, offering all of the features described above from the comfort of your listening chair. On top of that, the remote control handset gives you direct track access as well.
Circuitry
Separate power regulators for the digital and analog sections isolate the two electrically, and furthermore, careful layout of the PCB tracks around the Digital-to Analog converter helps to contain RF interference keeping distortion and noise to a minimum.
For the NAD C540 the 24 bit high resolution Burr-Brown Sigma-Delta Digital-to-Analog converter chip was chosen for its excellent low level linearity and detail retrieving capabilities.
The mechanism for the CD players uses digital servo controls and has the RF amplifier for the Laser pick-up mounted close to the pick-up itself. Both measures help to maintain the integrity of the signal and keep "jitter" to very low levels. Additional jitter reduction is achieved by mechanically damping the precision master clock crystal.
Metal film resistors and polypropylene stackfoil capacitors are used in key areas to ensure a highly accurate frequency response. Unusual at this price level, high quality Burr-Brown 2604 op-amps are used instead of the much lower grade and type normally found at this price level and higher. Apart from the single output capacitor, no other capacitors are used in the signal path and for the power supply the reknowned "Elna ™ Cerafine™" capacitors are used instead of the standard electrolytics.
The output impedance is very low at 300 Ohms, making the NAD C540 less sensitive to cables or the ancillary equipment it is partnered with. Not all digital outputs are equal. In the case of the NAD C540 careful attention has been paid so that best use can be made of the ever increasing number of products becoming available with digital inputs (DAT, DCC, MD recorders, outboard D to A converters, etc.). The coaxial output is buffered and isolated by a transformer from the converter itself and the output impedance has been carefully tailored to produce a precise 75 Ohm impedance to ensure perfect matching.
Truly excellent sound quality is difficult to find at this price, let alone with the added convenience of remote control. Anyone interested in a high performance CD player without frills should put the NAD C540 at the top of their shortlist.
General Specifications
Disc capacity Single disc 120mm or 80mm
Digital-to-Analogue conversion Sigma Delta 24 bit resolution
Digital filter 8 x oversampled
Analogue filter 4 pole active
Frequency response 5Hz - 20kHz 0.5dB
De-emphasis error 0.5dB
THD( at 0dB, 1kHz) 0.0035%
Dynamic range 96dB
Linearity (±0.5dB) 0 to -90dB
S/N ratio, A-weighted 108dB
Channel separation @1kHz 110dB
@10kHz 80dB
Wow and flutter Unmeasurable (Quartz accuracy)
Output impedance 300 Ohms
Output level at 0dB 2.2V rms
Digital error correction CIRC, double error correction in C1& C2
Remote control Yes
Physical Specifications
Dimensions (WxHxD) 17.1x2.75x11.25 in 435x70x285 mm
Net Weight 9.0 lbs 4.1kg
Shipping Weight 10.8 lbs 4.9kg
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