So I’ve been thinking about how my old Victrola works by passively amplifying the vibrations from the diaphragm through a simple box and how I can control the volume (somewhat) by opening and closing the doors. I said to myself, “Self, I bet that would work as a passive iPhone amp too.” I was thinking about how to get the iPhone speaker at the beginning of the sound's path, thinking it was gonna be complex like removing the arm of the Victrola. I didn’t want to damage the old girl.
And then, Eureka! I saw that the diaphragm and needle part of the arm come right off easily, revealing a simple way to get the iPhone sound in. After about an hour, I had this baby working.
Step 1: Materials and Tools
I used what I had laying around:
-Some PEX plumbing scrap; one piece 4.5” long and another 6” long.
-Some dowel that was just a bit too big to fit in the end of the PEX
-A bit of electrical tape
Total cost: $0
I used the tools I had, including a drill press (but I’m sure you could do it with a hand drill), a 3/8” drill bit and some smaller ones, a utility knife, and a handsaw. Thats it.