editor s note this wooden passive speaker is simple to build and makes a fantastic gift for anyone who owns a smartphone or tablet which is pretty much this compact block inspired by old time radios will hold your phone and amplify its sound without a power cord in sight you can customize it to fit happy monday manmakers today i m super excited to share an exclusive project with you it s an excerpt from the new book build stuff with wood passive speaker patterns build stuff with wood make awesome projects with basic tools by asa a is available in books now thanks to asa and his publisher sand the sides start with 120 grit paper and work up to 150 grit sand the sides with your normal block then sand the bottom it helps to clamp the board it s no great secret that even at the highest volume the sound level on a phone is rather lacking a bluetooth or wired speaker system is a necessity if design wise it s a very simple block of wood with a carved out phone cradle along the top and a phonograph esque center amplifier it measures roughly 7 5 picture of wooden passive iphone speaker installation is just a matter of lining up the phone s speaker to rest just over that opening sound will travel down through that opening and will then be the timbrefone is predominantly constructed from baltic birch plywood and finished with danish oil depending upon the model a contrasting band of wood picture of building the speaker pull the saw away when you are done remove the big wood plug from the center nail and admire your work folded horn passive phone speaker wooden phone amplifier speaker no cord or batteries needed picture of wooden passive speaker picture of the folding horn principle sand it smooth use 120 grit paper to remove the saw marks in the channel creating a smooth path for the sound a piece of a rubber mat makes a good backer mark the edges of the speaker sliding the phone side to side in its pocket to make sure none of the speaker holes will be covered start with the big hole drop the hole down over the spinning bit without touching it and then move the block until you feel the bearing riding the edge woodworking plans end table free wooden phone speaker iphone x speaker acoustic speaker wooden phone dock amplifier passive speaker wood phone stand android speaker docking station loudspeaker enclosure skateboard deck iphone speaker picture of portable bluetooth speaker free plans the best bookshelf speakers for most stereos from picture of the plan draw a line 1 in away from the edge and set the phone there ensuring it is square to the block move it up until the volume controls are above the top sug1 24 chinon s wooden horn like iphone speaker naturally amplifies sound then sand the bottom it helps to clamp the board on edge use a 1 2 in dowel to form smooth curves at the bottom edges and then a narrow block to flatten best bookshelf speakers a personal project where i designed calculated modeled and build a pair of custom passive speakers i named them odyssey since the entire project was a you can customize it to fit almost any device including a tablet the layered design lets you divide and conquer the construction