Beschreibung
Sony CDP-XA50ES CD Player With An Optical System Fixing USED WorkingDescription Model CD PlayerD/A converter Current pulse D/A converterDigital Filter Variable Digital FilterFrequency Response 2Hz to 20kHz ±0.3dBDynamic range 100dB or more (EIAJ)Total Harmonic Distortion 0.0017% or less (EIAJ)Wah flutter Less than ±0.001%W.peak (EIAJ)Digital output Light: -18dBm (emission wavelength: 660nm)Coaxial: 0.5Vp-p/75?Analog output Fixed: 2VrmsVariable: 2Vrms to 0VHeadphone output 28mW (32? load)Power supply AC100V, 50Hz/60HzPower consumption 18WDimensions Width 430 x Height 125 x Depth 375mmWeight Approx. 15.2kg ES series CD player with fixed optical system mechanism and variable digital filter. The mechanism employs a fixed optical system mechanism, in which the optical pickup is fixed to a solid base and the disc side is moved. This greatly reduces the vibration to which the pickup is subjected, and the current required for servo is limited to a relatively slow movement to compensate for disc distortion and eccentricity, thereby reducing servo current fluctuations.In this method, the disc is fixed from above using stabilizers to eliminate disc vibration. In addition, BSL motors are used for the disc drive motors to minimize rotational irregularities.The CDP-XA50ES uses a zinc die-cast pickup base to greatly reduce resonance and enhance the reproduction of micro-level sounds. The digital filter is equipped with a newly developed variable (V.C.) digital filter.The cutoff and phase characteristics of the digital filter as a filter can be set by a calculation formula, and changing these characteristics will change the sound quality. Therefore, multiple calculation formulas are registered in the newly developed IC for digital filters, allowing you to select your favorite position according to the audio equipment on hand, the room environment, and the song.In addition to the standard position with sharp roll-off characteristics, the ES series is equipped with No. 1, 2, 3, and 4 with slow roll-off characteristics. In addition, No. 3 and No. 4 can be selected from 3 levels each, for a total of 9 positions. The standard and spline positions of the variable digital filter employ a full feed-forward digital filter.This digital filter uses a three-stage method of double-type digital filtering, in which complementary data is first generated at the midpoint between the data obtained from the disc and the data, and then the resulting data is used to create the next set of complementary data. Conventional digital filters round off the lower bits of the calculation result obtained here and use only the upper bits, but this rounding error causes re-quantization noise.In the full feed-forward digital filter, the rounded lower bits are transmitted through a separate route and stored in memory, and the FF (full feed-forward) operation is performed to combine them with the calculation results of the next stage, thus realizing an oversampling operation that reflects the lower bits of data. This almost completely eliminates the re-quantization noise within the audible bandwidth, greatly improving the quality of low-level signals. The D/A converter uses a current pulse D/A converter.In this method, a stable and clean current source is prepared and switched using the output of a pulse generator to generate current pulses. This eliminates the effects of voltage fluctuations and the effects of voltage-generated noise in the arithmetic circuitry, which were problems with conventional pulse D/A converters that used voltage.In addition, the complementary PLM, which differentially synthesizes the output of the pulse D/A converter, is used to reduce harmonic distortion. The line amplifier section employs a DC servo amplifier configuration that eliminates coupling capacitors from the signal path. This eliminates the coloration characteristic of capacitors and provides stable amplification down to ultra-low frequencies.In addition, a type with improved bandwidth and slew rate characteristics is used for the audio I-V conversion circuit operational amplifier, and a type with significantly reduced noise level and distortion is also used for the buffer stage operational amplifier. This produces a sharp, sharp sound. The servo circuit uses a high-precision digital servo system that adjusts the servo amount of the optical pickups for each disc being played, enabling servo control that more accurately reflects the condition of the disc. A fine drive circuit is used in the drive circuits of the disc rotation system and optical pickups, and is composed of balanced push-pull circuits that can cancel out common-mode noise. This prevents noise contamination to the ground line.In addition, the digital circuit board has been minimized in volume, separated from the audio circuit board, and placed in the mechanical deck section to reduce the influence on the audio section. The display section uses static FL tubes that do not blink when there is no change in the display.This reduces the noise generated in the display section and its effect on the audio circuitry. Two R-core transformers are installed in the power supply section to feed the digital and servo systems and the audio system independently, thereby reducing mutual interference between the circuits.The R-core transformers have a circular doughnut-shaped cross section with no breaks in the iron core, greatly reducing magnetic flux leakage and vibration. The center mechanical mounting system is used for the internal layout. The mechanical deck, which is the only mechanically operating section of the CD player, is placed in the center of the chassis to minimize the rotational moment applied to the chassis and improve the stability against vibration. The chassis is an FB chassis, with a frame surrounding the perimeter and beams passing in front and behind to solidify the entire chassis as a single box. By combining members of different shapes and sizes, natural vibrations are cancelled each other out, greatly reducing vibrations of the chassis as a whole.The top plate is equipped with a double-layered top plate. Eccentric insulators are used in the legs.These insulators are designed with the mounting holes offset from the center to mutually cancel out external vibrations, thereby reducing vibration transmission to the chassis. The position and diameter of the holes were determined through repeated prototyping and auditioning, and are particularly effective in attenuating vibration components in the mid- and high-frequency range, which affect the auditory perception. The AMS is equipped with a jog dial for rotary song selection, which allows the user to select a song before or after the previous one.This allows the user to select songs by using the fingertip senses, for example, rapidly until the target song and slowly until the end of the song. The custom edit function allows the user to operate functions such as peak search, time edit, just edit, program edit, time fade, manual fader, and variable fade. A custom file function is provided, allowing memory for custom indexes and delete banks.The maximum number of cards supported is up to 224. It has functions such as delete play, shuffle play, delete shuffle, auto space, timer play (auto start), 8-mode repeat, and index search. Two digital outputs, optical and coaxial, are provided. Two analog outputs, fixed and variable, are provided.It also has a headphone jack with volume control that doubles as a line out. A wireless remote control is included. Shipping FedEx?or DHLInternational Buyers - Please Note:Import duties, taxes, and charges are not included in the item price or shipping cost. These charges are the buyers responsibility. Please check with your countrys customs office to determine what these additional costs will be prior to bidding or buying. 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