Introduction: Victrola Style Passive Speaker

Surprisingly effective passive amplifier. 11db increase in volume from across the room, better bass, and a bit of reverb.

  • Cone is made from 2 file folders joined with CA glue, and coated with truck bed liner
  • Tube is a 2" p-trap with a 2" thread adapter and a 3in flush fit cap, painted with hammer texture paint and then metallic oil-rubbeb bronze
  • Mounting bracket is 5/8" aluminum flat stock
  • The back plate and phone slot are just from some scrap 2"x10" pine I had lying around.


"RetroFuture Clean" Kevin MacLeod ( Licensed under Creative Commons: By Attribution 3.0


kmrobinson1 made it! (author)2015-10-26

Cone measurements please?!

kmrobinson1 made it! (author)kmrobinson12015-10-26

This is awesome possum but I would really like to know :/

blipside made it! (author)2015-09-09

Thanks for posting this. What were the measurements you used for making the cone?

blipside made it! (author)blipside2015-09-09

I forgot to mention, I love that you left all of the sounds when you sped up the video.

halzark made it! (author)2015-01-24

Could you take a few more pictures of the cone from a "head on" angle and from the side and top? It's hard to get a sense of how the file folders were used to construct the "cone" which looks most interesting. Also what is "CA" glue?

TabLeft made it! (author)TabLeft2015-01-26

Yeah I'll take some additional pictures soon. As for CA glue it's short for cyanoacrylate which is basically just super glue but it's often sold with an activator spray wish sets it instantly. That's what you see me spraying onto the glue in the video.

Gregbot made it! (author)2014-10-27

Nice! Thanks!

TabLeft made it! (author)TabLeft2014-10-27

You're very welcome. It was fun i'm glad you enjoyed it.

seamster made it! (author)2014-10-27

This is a cool looking amplifier! I love that you used common materials to make it. Nicely done!

TabLeft made it! (author)TabLeft2014-10-27


misko13 made it! (author)2014-10-27

This should be a must in every house!

TabLeft made it! (author)TabLeft2014-10-27

Thanks, I have it in my workshop fro now, but my wife says its too pretty to have in the garage so i think my days with it are limited.

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