Related Clues:

• From both sides, sound-wise
• Car's audio system
• Earbuds effect
• Set pulsating disc on first audio device
• More than one-track
• Boombox's austere orchestral extract
• Player in a club
• Bose Wave SoundTouch, e.g
• Colour sergeant ignores clangour from music system
• Sound through two speakers
• Sound system with multiple speakers
• Two speaker setup
• Not mono, maybe
• AirPods effect
• Something a couple of speakers can provide