Complex sentence: A set of Westminster chimes are played on a vibraharp every quarter hour or every hour and can be heard away, due to what was a state-of-the-art amplification system when it was built.
Split into simpler sentences: A set of Westminster chimes are played on a vibraharp every quarter hour or every hour. The sounds of the chimes can be heard away, due to what was a state-of-the-art amplification system when it was built.