| Summary | ||||
|---|---|---|---|---|
| Parameter | My Opinion Shock Suppression On/Off |
Mode of Operation |
||
| Shock Suppression Enabled | Shock Suppression Disabled | |||
| Frequency Response | Good | 20-20 KHz +0.2/-1.8 dB | 20-20 KHz +0.0/- 1.8 dB | |
| 1 kHz Total Harmonic Distortion | Very Good | 0.09% @ -0 dB | 0.05% @ -0 dB | |
| Signal to Noise Ratio | Good | 61 dB | 66 dB | |
| 20 Hz Total Harmonic Distortion | Very Good |
|||
| 19 & 20 kHz Intermodulation Distortion | Poor/Good | 0.5% @ 0 dB | 0.07% @ 0 dB | |
| Dynamic Range | Excellent/Excellent | 85 dB | 89 dB | |
| Jitter Distortion | Poor/Excellent | <-58 dB | -112 dB | |
| Equipment Used: | Test media was a custom CD created with CoolEdit Pro 1.1 in 32 bit mode, converted to 16 bit with 0.53 bits of spectrally uniform, Gaussian distributed dither; and burned onto Ricoh media using a Plexstor R412C and EZ CD Deluxe 3.5. Signals processed into computer using an Event Layla. Signal analysis with SpectraLab 3.32.14. | |||
TeDis
Discussion Of Results
The jitter and high frequency distortion of this player were not very good when the shock control circuits were enabled. The mediocre SNR in the face of a reasonable showing for dynamic range suggests that this player generates higher-than-average amounts of modulation noise. There is a high frequency roll-off that might be audible to sensitive listeners with very good headphones or speakers.
| Sony D-247 Portable CD Player Digital Player Frequency response (Digital Media to Digital Signal Output) |
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| Sony D-247 Portable CD Player Digital Player Frequency response (Digital Media to Digital Signal Output) |
| Sony D-247 Portable CD Player Digital Player 1 kHz Total Harmonic Distortion and Noise (Digital Media to Digital Signal Output) |
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| Sony D-247 Portable CD Player Digital Player 1 kHz Total Harmonic Distortion and Noise (Digital Media to Digital Signal Output) |
| Sony D-247 Portable CD Player Digital Player 20 Hz Total Harmonic Distortion and Noise, Digital Media to Digital Output |
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| Sony D-247 Portable CD Player Digital Player 20 Hz Total Harmonic Distortion and Noise Digital Media to Digital Output |
| Sony D-247 Portable CD Player Digital Player Residual Noise - (Dynamic Range) (Digital Media to Digital Signal Output) |
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| Sony D-247 Portable CD Player Digital Player Residual Noise - (Dynamic Range) (Digital Media to Digital Signal Output) |
| Sony D-247 Portable CD Player Digital Player IM Distortion (Digital Media to Digital Signal Output) |
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| Sony D-247 Portable CD Player Digital Player IM Distortion; (Digital Media to Digital Signal Output) |
| Sony D-247 Portable CD Player Digital Player FM Distortion - "Jitter" (Digital Media to Digital Signal Output) |
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| Sony D-247 Portable CD Player Digital Player FM Distortion - "Jitter" (Digital Media to Digital Signal Output) |
| Sony D-247 Portable CD Player Digital Player Frequency Response, Digital Media to Analog Output |
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| Sony D-247 Portable CD Player Digital Player Frequency Response, Digital Media to Analog Output |
| Sony D-247 Portable CD Player Digital Player Total Harmonic Distortion and Noise, Digital Media to Analog Output |
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| Sony D-247 Portable CD Player Digital Player Total Harmonic Distortion and Noise, Digital Media to Analog Output |
| Sony D-247 Portable CD Player Digital Player Intermodulation, Digital Media to Analog Output |
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| Sony D-247 Portable CD Player Digital Player Intermodulation, Digital Media to Analog Output |
| Sony D-247 Portable CD Player Digital Player Dyanic Range, Digital Media to Analog Output |
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| Sony D-247 Portable CD Player Digital Player Dynamic Range, Digital Media to Analog Output |
| Sony D-247 Portable CD Player Digital Player 20 Hz Total Harmonic Distortion and Noise, Digital Media to Analog Output |
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| Sony D-247 Portable CD Player Digital Player 20 Hz Total Harmonic Distortion and Noise Digital Media to Analog Output |
| Sony D-247 Portable CD Player Digital Player Jitter, Digital Media to Analog Output |
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| Sony D-247 Portable CD Player Digital Player Jitter, Digital Media to Analog Output |
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