SONY CDP-720
¥ 32,000 (released in 1995)
Commentary
A CD player with a full feed-forward digital filter.
The digital filter is a full feed-forward type digital filter developed for ES series CD players.
The full-feed-forward digital filter is equipped with an FF operation block to transmit data that was previously truncated, enabling more precise musical expression and eliminating requantization noise in the audible band caused by data truncation.
The D/A converter is equipped with an advanced pulse D/A converter.
We have also adopted complimentary service PLM, which reduces harmonic distortion by differentially synthesizing two PLM wave outputs that are complementary among the four output pulse D/A converters.
An FET input op-amp is used in the amplifier stage after D/A conversion to improve sound quality.
High-precision digital servo is used in the servo circuit, and by using A/D and D/A converters with high sampling rate, servocontrol which accurately reflects disk condition is realized.
Anti-vibration measures are applied to the top plate to reduce the effect of vibration.
The custom edit function allows you to perform peak search, time edit, just edit, program edit, time fade, manual fader and other operations.
Features such as Delete Play, Shuffle, Delete Shuffle, 3-way Music Scan, Auto Space and 7-mode repeat are equipped.
Equipped with timer play mechanism, timer play is possible by combining with separately sold timer.
Equipped with an optical digital output.
Equipped with two analog outputs, fixed and variable.
It has a headphone port.
Wireless remote control is included.
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Model Rating
| Type | CD Player |
| D/A converter | Advanced Pulse D/A converter |
| Digital filter | Full-feed digital filter |
| Frequency characteristic | 2 Hz to 20 kHz ± 0.5 dB |
| Total harmonic distortion factor | 0.0025% or less (EIAJ) |
| Signal-to-noise ratio | 113 dB or more (EIAJ) |
| Dynamic range | 99 dB or More (EIAJ) |
| Wow and flutter | Below the measurement limit (± 0.001% W. peak) (EIAJ) |
| Output level | Fixed : 2 Vrms Variable : 2 Vrms to 0 V |
| Digital output | Optical : -18dBm (emission wavelength 660 nm) |
| Headphone output level | 10 mW (32 Ω) |
| Power supply voltage | 100 VAC, 50Hz/60Hz |
| Power consumption | 10W |
| External dimensions | Width 430x Height 110x Depth 295 mm |
| Weight | Approx. 4.1 kg |
| Attachment | Wireless Remote Control RM-D820 |