Used Casio CT-S1RD

The CT‑S1 (including the red CT‑S1RD variant) from Casio is a portable 61-key keyboard that combines simplicity, style, and expressive sound. Built with Casio’s AiX sound engine, it provides a rich tonal quality and realistic feel. The keyboard is compact and lightweight, making it ideal for playing anywhere — at home, on the go, or in tight spaces. It features a clean, minimalist design that lets you focus on the music, while its horizontal bass-reflex speaker system delivers clear, full-bodied sound. The CT‑S1 supports battery operation, so you can play without being plugged in, and it’s compatible with the Casio Music Space app for learning and creative exploration.

Key Features

• 61 full-size keys with 3-level touch sensitivity for expressive playing

• AiX Sound Source delivering 61 carefully crafted tones, including acoustic pianos, electric pianos, organs, and classic Casio sounds

• 64-voice polyphony 

• Built-in effects: reverb, delay, chorus, DSP, and a master EQ

• Volume-Sync EQ adjusts bass and treble automatically to maintain tone clarity at low volumes 

• Surround function for a wider, more immersive sound field

• Layer function allows combining two tones for richer textures 

• One-button MIDI recorder to capture your ideas quickly