Add punctuation: These multiway systems where music is reproduced through separate units for bass midrange and treble are currently the most widespread and will for many people be the definition of a speaker
A: These multiway systems, where music is reproduced through separate units for bass, midrange and treble, are currently the most widespread and will for many people be the definition of a speaker.

Add punctuation: As of Friday June 16th our old premises in Fuengirola will only be manned by our security guards technicians and warehouse staff If you need to pick up or drop off keys you can still do this at the Fuengirola office but you will need to make an appointment in advance
A: As of Friday June 16th, our old premises in Fuengirola will only be manned by our security guards, technicians and warehouse staff. If you need to pick up or drop off keys, you can still do this at the Fuengirola office, but you will need to make an appointment in advance.

Add punctuation: I want to stick to 2015 with regard to Maximum Sustainable Yield but we must realise that it is not possible for all stocks
A:
"I want to stick to 2015 with regard to Maximum Sustainable Yield, but we must realise that it is not possible for all stocks.