The Yamaha B1 TC3 upright piano pairs Yamaha’s b‑Series acoustic design with the advanced TransAcoustic™ TC3 system, allowing you to enjoy true acoustic piano touch and resonance, while also offering volume control, silent headphone mode and Bluetooth connectivity. :contentReference[oaicite:1]{index=1}

Key acoustic specifications include an 88‑key keyboard with b Series Special hammer action, key surfaces of white keys in acrylic resin and black keys in phenolic resin. The cabinet dimensions are approximately width 149 cm, height 109 cm, depth 54 cm and weight about 198 kg for the B1 TC3 model. :contentReference[oaicite:2]{index=2}

The TransAcoustic™ TC3 system incorporates Yamaha’s specially developed transducer that vibrates the soundboard so that digital sounds resonate naturally through the acoustic cabinet. With wireless Bluetooth MIDI/audio and Yamaha’s Articulation Sensor System under each key, the piano reproduces expressive nuances and supports modern connectivity for apps and recording. :contentReference[oaicite:3]{index=3}

• Model: B1 TC3 (b‑Series Compact Upright)
• Keys: 88 full size
• Hammer type: b Series Special
• Dimensions (W×H×D): approx. 149 cm × 109 cm × 54 cm
• Weight: approx. 198 kg
• Key surfaces: White – acrylic resin; Black – phenolic resin
• Pedals: Damper / Silent mode (Silencing) / Soft
• Technology: TransAcoustic™ TC3 – volume control, headphone mode, Bluetooth audio/MIDI
• Connectivity: USB, AUX In, Bluetooth