How many watts do I need?

How much power should your amplifier have to properly drive your speakers? (subtitled in English and Dutch - Nederlands ondertiteld). Excell sheet: copy the link below into your browser (it will not work as direct link). https://www.patreon.com/file?h=895540... This video on Patreon:   / thehbchannel   The written English version:TBA Dutch written version: NNB Link to my book: http://thehbproject.com/en/news/116/f... My personal site: http://www.hansbeekhuyzen.nl My site: http://www.theHBproject.com/en Youtube channel:    / thehansbeekhuyzenchannel   Facebook:   / hansbeekhuyzen   Google+: http://www.google.com/+TheHansBeekhuy... Twitter:   / hansbeekhuyzen   Kindle store: http://tinyurl.com/h6erz9g Apple iBook Store: http://tinyurl.com/jxvz5cm