Thin-toned
Else clues• Bassless?
• Cheap
• Cheap-seeming
• Cheap-sounding
• Hardly mellow
• Lacking in resonance
• Lacking in resonance, e.g.
• Lacking resonance
• Like a cheap piano
• Like a honky-tonk piano
• Like a toy ukulele's sound
• Like cheap pianos
• Like cheap speakers
• Like old radios
• Metallic
• Metallic in sound
• Metallic-sounding
• Not at all resonant
• Not resonant
• Not very durable
• Of poor sound quality
• Opposite of woody, per a Monty Python sketch
• Sonically poor
• Sounding like a toy piano
• Sounding poor, as a piano
• Stannic
• Thin in tone
• Thin sounding
• Thin, as sound
• Weak and thin, as a voice