‌The Tascam CD-RW900SX is a professional CD recorder and player, succeeding the CD-RW900MKII model. Its key features and specifications include:

Recording:

• Utilizes a pocket CD drive for continuous, uninterrupted recording.
  
• High-efficiency codec system for analog/digital and digital/analog conversion, ensuring clear sound with a frequency response of 20 Hz to 20 kHz ±0.8 dB.
  
• Various recording methods, including automatic track creation based on input level, time, or direct digital recording.
  

Input and Output Control:

• Independent sensitivity controllers for left and right analog input channels.
  
• Equipped with unbalanced analog connections, coaxial SPDIF, and optical digital input/output.
  

Device Control:

• Capability to control the device using a standard computer keyboard connected to the front panel port.
  
• Allows text input, like track titles and artist names, using an optional keyboard.
  

Playback:

• Advanced playback options, including speed and key control, Auto-Cue, Auto-Ready, and various repeat modes.
  
• Shock-proof memory ensuring smooth playback even during shocks or vibrations lasting up to 4 seconds.
  

Additional Features:

• Supports CD-R, CD-R-DA, CD-RW, CD-RW-DA media.
  
• Capability for erasing and finalizing CD-RW discs.
  
• Displays elapsed and remaining time for discs or tracks.
  
• Plays MP3 files from data discs (up to 8 folder levels).
  
• Supports CD-Text and text input via computer keyboard.
  
• Headphone output with volume control.
  
• Sample rate converter on digital inputs.
  

Installation and Power:

• Rack-mountable design (19 inches, 2U).
  
• 3-pin power socket with a detachable cable.
  

The CD-RW900SX is an ideal solution for reliable CD recording and playback in various environments, such as sound companies, recording studios, and fixed installations​