Features:

• CD/MDLP deck (not a 5-CD changer, as Musician's Friend states)
• ATRAC DSP Type-S (MDLP mode support)
• 4X CD->MD dubbing (but realtime, analog dubbing for MP3-CDs->MD)
• CD section supports MP3 CDs.
• Digital/Analog REC level control
• Group mode support
• 6-second time machine recording
• Music synchro recording, smart space
• Program play, shuffle play, 3 repeat modes: 1 track, all tracks, A-B
• Scale Factor edit
• Pitch control (pitch increase not possible)
• Timer recording/playback (with separately purchased AC timer)
• Wireless remote (RM-D54J)
• No music calendar, no Kanji display
• Compatible with RM-D20 QWERTY keyboard remote
• Availability: Japan, UK, USA

Links:

• Sony Japan catalog page
• AV-Land (UK)
• Minidisc T-station page.
• Musician's Friend page.
• Crutchfield page.

Specs: SNR & Dynamic Range > 96dB. Freq resp: 5hz-20khz +/-0.5dB. THD: < 0.005%. Hybrid Pulse DAC (192khz, 24bit), ADC (96khz, 24 bit)

Reviews:

User Manual: MXD-D400

Service Manual: MXD-D400