Manufacturer Sony
Released 1998/09
Device type deck
NetMD No
Hi-MD No
Radio No
Dimensions 430x125x345mm
Weight 9.3Kg
ATRAC ver 4.5
Power cable AC
Price (launch)
¥120 000
Inputs RCA in, Digital optical (TOSLINK), Digital coaxial
Outputs 1/4 inch headphone, RCA out, Digital optical (TOSLINK)

Features: ATRAC 4.5 (IC: CXD2537R). Very similar to Sony MDS-JA50ES (below), with these differences: 1) 20 bit delta-sigma A/D (vs. 24 bit in JA50ES), 2) includes newly developed S-TACT IC pulse generation section [for DAC], reducing digital and analog noise, 3) has only one R-core transformer (vs. 2 in the JA50ES). Remote: RM-D14M

User comments: In comparison to the JA50ES, the '50 seems to have far better construction and power supply. As a result, it has slightly better numbers in dynamic range (105dB vs 104dB) and S/N ratio (108dB vs 107dB). These numbers are for playing back, so the difference in A/D converters has no effect. Notice that JA50ES is really heavy (14.3kg vs 9.3kg for the '30). If you look and touch these units, you can feel the difference of materials.

Specs: Dynamic range: 104dB. S/N (manual: >104dB, brochure: >107dB, German Stereo magazine: >112dB). Freq. resp: 5-20kHz +/-0.3dB. THD: brochure: <.002%, German Stereo magazine: <.0012/.0013 (L/R). Line in: 47 kOhm, 500mV rms (min: 125mV rms). Coax in: .5Vp-p +/-20%, 75 Ohms. Optical in: 660nm. Line out: 2Vrms@50 KOhms, impedence: 10 KOhms. Digital out: -18dBm, 660nm. Phones: 28mW, 32 Ohms. GaAlAs laser output: 780nm @ <44.6 micro watts (measured at 200mm for the object lens surface of the optical pick-up block with 7mm aperture).

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  • equipment/sony/deck/mds-ja30es.txt
  • Last modified: 4 months ago
  • by specialk