Bluetooth Speaker

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Project by Mainiac Matt posted 07-21-2017 03:03 PM 2121 views 15 times favorited 23 comments Add to Favorites Watch

Just a quick project to make use of some ceiling speakers I got for free. Aside from the circuit board and lighted rocker switch, all wood and components were on hand already, so my net out of pocket was $20 (proof that being a hoarder actually can pay off).

>Melamine front panel (to match the speaker grills)
>Poplar frame
>Birch plywood back

First time ever “skill builder” elements:
>Cutting circles with a router jig (my late father’s old Craftsman, for which he bought just about every jig they made).
>Using Alcohol die
>Spraying die with HVLP gun
>Grain matching/wrapping around a mitered corner.

>General Finishes Natural Wood Prep.
>SolarLux Medium Mahogany alcohol based die.
>General Dark Walnut gel stain.
>Minwax rattle can satin Lacquer

I tested a couple different stains I had on the shelf and decided to go with the SolarLux die over the General prep. This tested OK when I wiped on the die on a test piece of Poplar, but when I sprayed the speaker box, the die puddled up in large beads, leaving me quite dismayed. I let the Alcohol flash off and it didn’t look as terrible, so I went on to wipe it in with two add’l coats. This left the piece quite a bit darker than I had intended, but it highlighted the deeper grain almost black, and I did like the contrast. So I used the wipe on gel stain to bring out the grain more evenly in the smoother sections and decided I’d tell people I was trying to make it look like Redwood :^)

Here’s the Bluetooth amp board I purchased on Amazon
The board has control buttons on it, but aside from the on/off switch, all of these functions can be done on the phone/tablet, so didn’t feel the need to provide access to the board.

I used a wall wart 12 v DC power supply salvaged from an old cordless phone unit but decided to buy a lighted switch (as I could envision myself frequently forgetting to turn the thing off).

The sound is pretty good. The amp is clean and has no hiss at reasonable volume levels (I haven’t turned it up passed 1/2 way as it really can crank). The speakers are not “audiophile” quality, but then again, Bluetooth signal quality isn’t audiophile standards either, so what difference does it make.

I had intended to use this for shop tunes, but my oldest daughter’s 18th birthday is coming up soon, so I think I’ll give it to her.

Thanks for looking, I’ll attempt to answer any questions.

-- Matt -- I yam what I yam and that's all what I yam

23 comments so far

View lightcs1776's profile


4250 posts in 2287 days

#1 posted 07-21-2017 03:06 PM

Nicely done. Great, practical project.

-- Chris ** If there must be trouble, let it be in my day, that my child may have peace. — Tom Paine **

View Mainiac Matt 's profile

Mainiac Matt

9416 posts in 2962 days

#2 posted 07-21-2017 03:16 PM

I must say, I can see speaker building becoming a little addictive.

If I do give this one a way, I’ll have to make another one for the shop, right?


-- Matt -- I yam what I yam and that's all what I yam

View Redoak49's profile


4406 posts in 2622 days

#3 posted 07-21-2017 03:33 PM

Great build and speaker….this is my next project.

View CFrye's profile


10851 posts in 2473 days

#4 posted 07-21-2017 03:35 PM

Looks great, Matt! And, yes, if you gift this one you will have to build another. ;-)

-- God bless, Candy

View helluvawreck's profile


32086 posts in 3500 days

#5 posted 07-21-2017 03:46 PM

You did a very nice job on this speaker.

helluvawreck aka Charles

-- helluvawreck aka Charles,

View Mainiac Matt 's profile

Mainiac Matt

9416 posts in 2962 days

#6 posted 07-21-2017 04:40 PM

I think that for my next one I’ll build a reflex speaker (with ports) and I may buy a set of plans, as there’s a lot to the science of good acoustics.

-- Matt -- I yam what I yam and that's all what I yam

View bandit571's profile


24623 posts in 3316 days

#7 posted 07-21-2017 04:47 PM

Good looking box!

-- A Planer? I'M the planer, this is what I use

View Jerry's profile


3365 posts in 2281 days

#8 posted 07-21-2017 05:05 PM

Absolutely freaking super cool!

-- There are good ships and there are wood ships, the ships that sail the sea, but the best ships are friendships and may they always be.

View rhybeka's profile


4763 posts in 3755 days

#9 posted 07-21-2017 05:17 PM

awesome! will the next one be dovetailed, Matt? :D

-- Beka/Becky - aspiring jill of all trades, still learning to not read the directions.

View Arlin Eastman's profile

Arlin Eastman

4277 posts in 3194 days

#10 posted 07-21-2017 05:19 PM

Well done Matt well done!!!

-- It is always the right time, to do the right thing.

View Monte Pittman's profile

Monte Pittman

30512 posts in 2971 days

#11 posted 07-21-2017 05:35 PM

Perfect build sir.

-- Nature created it, I just assemble it.

View Colin's profile


174 posts in 1997 days

#12 posted 07-21-2017 05:49 PM

Nice one – love those wraparound corners

-- Live Forever...............or Die Trying

View dhazelton's profile


2839 posts in 2930 days

#13 posted 07-21-2017 08:30 PM

Looks like a Tivoli radio! Do the boards come with wiring diagrams?

View DS's profile


3373 posts in 3053 days

#14 posted 07-21-2017 09:08 PM

Nice job on the speaker, Matt!
You have me thinking now…

I did some audiophile quality speaker boxes for my wall unit surround sound a few years back.
I’m wondering if that circuit card could go into something like that and interface nicely with the new smart TVs and NOT lose much fidelity?

Recently, I acquired another set of four Woofers, tweeters and cross-overs for the same/similar quality speakers and “Momma needs a new pair of shoes”, so to speak. The master bedroom smart TV is still just running on the crappy little things that came inside the 1” thick TV enclosure.

-- "Hard work is not defined by the difficulty of the task as much as a person's desire to perform it.", DS251

View JL7's profile


8763 posts in 3598 days

#15 posted 07-21-2017 09:11 PM

Beautiful work Matt…..really turned out well. You got me thinking that I may need to try one of these…..thanks.

-- Jeff .... Minnesota, USA

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