Designer:

Fercho

Project Category:

Portable Speakers

Project Level:

Intermediate

Project Time:

8-20 Hours

Project Cost:

$100 – $500

Project Description:

Boombox as originally design by Paul Carmona, interior is 1/2″ MDF with locking joints and unique exterior design. Unlike other designs, I opted for a TPA3116 2.1 plate amp 50W/50W – 100W with exterior brick 24vdc transformer

Design Goals:

I wanted the speaker to resemble the look of the Bose 901 V, I liked its design.

Driver Selection:

Tang-Band W5-1138SMF
Fountek FE85

Enclosure Design:

Exterior in Walnut with water based polyacrylic in satin sheen. Front baffle with “vintage” fabric.

Enclosure Assembly:

Locking rabbets and dado joints all inside in order to make the enclosure air sealed as much as possible.

Crossover Design:

The crossover as described by Paul Carmona for the Fountek full drivers, soldered point to point onto a 1/4″ MDF board. I only replaced the 100uf electrolytic capacitor with a more expensive film type.

Conclusion:

Big thank you to Paul Carmona for sharing this design, very grateful. As many others that have build this little speaker, I am very happy with the sound that emanates from this speaker, could not be any better.

Tips & Tricks:

I decided to use a plate amp because like a sub, this amp is attached on the exterior. I did not want an internal amp like other builders have used, because it reduces is internal premium space; the amp uses exterior brick tranformer and it also allows me to hook up a Dewalt 20v battery and thus making unnecessary to put internal batteries, chargers, etc. As per bass port tube, I found that the paper mailing tube has the exactly 1.5″ diameter that Paul specifies.

About the Designer:

Paul Carmona is the designer, I merely followed his directions and the only thing I did was braced it differently internally and give it the look I wanted. Sorry for not posting the build, so many DIYurselfers have already posted tons of “hows”.

Project Parts List: