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Project by bake posted 01-20-2015 03:23 AM 1812 views 6 times favorited 6 comments Add to Favorites Watch

I made this for my daughters 19th birthday, a passive amplifier for her Samsung Galaxy 5 smartphone.
The speaker cone is circassian walnut, the body is a block of mystery wood I had laying around.
The finish is mineral oil. It was so cold in my shop that I was afraid nothing would dry.
The phone pictured is not the one it was made for so it doesn’t fit quite right.
This thing works really well, I am surprised at how much better the phone sounds using it.

-- I love the smell of Home Depot in the morning, it smells like.......carpentry. Bake, Bar Lazy U Woodworks, Lehi,UT.

6 comments so far

View Robsshop's profile


899 posts in 2395 days

#1 posted 01-20-2015 12:26 PM

Very nice work and a gift much appreciated I am sure. I like the wood combos and over all design. Is there any real technical design features to follow or just common sense construction ? Thanks for sharing…....Rob

-- Rob,Gaithersburg,MD,One mans trash is another mans wood shop treasure ! ;-)

View altendky's profile


169 posts in 1630 days

#2 posted 01-20-2015 12:55 PM

If you look up horn loaded speaker design you’ll find lots of very detailed info. It’s basically the modern day version of the horn on a gramophone. A cell phone speaker certainly isn’t designed for horn loading (higher pressures than open air drivers, I believe), but it can certainly gain something from it and that would be the direction you would look for a technical understanding. The basic gist is that you provide a relatively smooth transition from the hard material of the speaker cone to the soft atmospheric air by having a gradually expanding cross section in the horn. This makes the transfer of energy more efficient.

View Canadian Woodworks's profile

Canadian Woodworks

702 posts in 2490 days

#3 posted 01-21-2015 02:29 AM

Cool! Looks nice I want one…. Time to make some saw dust

-- Paul Lemiski, Ontario Canada, Custom Wooden Rocking chairs and tables

View Rick M.'s profile

Rick M.

7699 posts in 1800 days

#4 posted 01-21-2015 06:40 AM

Nice looking speaker especially the turned horn. That’s what’s missing from many of these things, woodturning.

BTW, anyone interested in what altendky was saying about horns should watch this video.


View fivecodys's profile


566 posts in 1056 days

#5 posted 01-21-2015 10:35 PM

Very nice!
I like that “Mystery Wood” too!

-- Chem, Central California

View fivecodys's profile


566 posts in 1056 days

#6 posted 01-21-2015 10:35 PM

Don’t know why this posted 2x.
Sorry guys!

-- Chem, Central California

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