1998 Casio CTK-411 MIDI keyboard, for external speaker, slimmed down

I slimmed down this 1998 mono keyboard and modded it to use an external speaker.

Features:

• 100 instruments, 100 drum tracks, 100 Songs
• MIDI In and Out jacks
• use your own speaker for output; no amp required. (no internal speakers)
• You can also use headphones, or connect to an amplifier
• Has a spring-connector for the speaker wires, see photos.
• powered by detachable AC adapter, included
• measures about 30x12x4 inches

100 tones : Choose from among orchestral sounds, synthesized sounds, and more.

100 rhythms : 100 versatile rhythms help to add plenty of life to all your key- board performances.

Auto Accompaniment :Simply play a chord and the corresponding rhythm, bass and chord parts play automatically.

100-tune Song Bank : A wide selection of favorites for your listening enjoyment or play along fun. A simple operation cuts out the melody part or accompaniment part of the tune, allowing you to play along on the keyboard.

Musical Information System : A big LCD screen graphically shows you fingerings, keyboard keys to be pressed, and notes, making keyboard play more informative and enjoyable than ever before.

MIDI compatibility: Connecting to another MIDI device lets you sound notes on both this keyboard and the connected device by playing on this keyboard. You can even playback pre-recorded MIDI data.