Related Clues:

• Shoddy
• Cheap-seeming
• Thin, as sound
• Of poor sound quality
• Lacking in resonance
• Weak and thin, as a voice
• Metallic in sound
• Lacking resonance
• Lacking in resonance, e.g.
• Metallic-sounding
• Like cheap speakers
• Like this puzzle's theme?
• Sounding poor, as a piano
• Stannic
• Like a cheap piano