I tend to prefer wired speakers over bluetooth but have minimal space for my old large amplifier. I wanted something small and cute to use with my TV and set of desktop speakers. I also wanted a system that had a stereo-mini port and could be plugged directly into my iPhone, android or iPad to play music. I ended up ordering a small amplifier on amazon.com and creating the case using 1/8" plywood on the laser cutter. Made at the TechshopSF.
Step 1: The Amplifier.
Here are the specifications for you audiophiles:
Size: 110mm (D) X 140mm (W) X 40mm (H)
P.M.P.O : 2 x 180W
R.M.S : 2 x 20W
Input power : DC10~14.4V≧3A
Input sensitivity : 200mv
Frequency response : 20Hz - 20kHz
Speaker impedance : 4 - 8ohm
Minimum THD : <0.4%
Signal noise / ratio : >80db
RCA ans stereo mini input
Step 2: The Enclosure.
You will notice that the amp enclosure has a little shelf on the inside which is what holds the amplifier in place. The enclosure is assembled around the amplifier which is simply sandwiched in there.
I used a few dabs of glue at the finger joints and along the inside edge of the living hinge to hold the enclosure together. For something this small, I usually just use some scotch tape to hold everything together while the glue is drying (at least 1 hour). I suppose you could use clamps but it seems like overkill. My favorite wood glue is titebond II.
Step 3: Finish.
Thanks to the TechshopSF and also to user fasaxc for design inspiration.
Here is a link to his awesome Arduino radio enclosure.