Today we'll be building a Bluetooth speaker! Visually it looks fantastic with a lovely wooden front and a concrete outer shell. This concrete not only looks great, but it helps audio quality too, as the sound produced by the speaker is very solid and confident due to the lack of resonance. Plenty of techniques will be used for this project, so sit back and enjoy! Links for everything: Dayton Audio ND65 speaker drivers (US): http://amzn.to/2yxNaPt Dayton Audio ND65 speaker drivers (EU): https://www.soundimports.eu/en/nd65-8-2-1-2-aluminum-cone-full-range-driver.html 30w Mini Amplifier (eBay US): http://ebay.to/2hnWZJ7 30w Mini Amplifier (eBay UK): http://ebay.to/2gkXRxS Bluetooth Receiver (eBay US): http://ebay.to/2xRZhJK Bluetooth Receiver (eBay UK): http://ebay.to/2xEDgi1 DC-DC Isolating Converter (US): http://ebay.to/2wpoQ1m DC-DC Isolating Converter (UK): http://ebay.to/2x4FVgs Step down voltage converter (US): http://ebay.to/2fFWUDp Step down voltage converter (UK): http://ebay.to/2xIJ1Zp Potentiometer (US): http://ebay.to/2xKaUQX Potentiometer (UK): http://ebay.to/2kb9YC0 Battery Bank Tubes: http://ebay.to/2CsKPrC Detailed templates: https://drive.google.com/open?id=0B-WzRpdWmGhjal91SFp2Q1dXbXM Sign up to AudioBlocks here for some royalty-free goodness: http://audioblocks.com/DIYPerks_0917