The CUBE OF SOUND

[n9voc]

Good Day!

Attached are pictures of one of the most unusual builds I've done to date - a little amplifier I call the "Cube of Sound" - speakers on three sides.

It began with a TDA7053 amplifier kit, two excess computer speakers (by Boston Acoustic) and two 3.2 ohm speakers from garage sales.

I wanted to have a second input that I could run from a mic level to a line level in, and thus the Cube of Sound was born.  A drawer pull for the handle, and rubber furniture cups for the feet came from the hardware store.  With such an unusual look, I just HAD to paint the backplate rather than clear coat it!

[n9voc]

More pics of the "Cube of Sound"

[n9voc]

And Finally, the schematic to the "Cube of Sound".

It sounds cool, and looks definately unusual.  You will note the side speakers are out of phase with each other- that is deliberate.  This is a standard "trick" of  mounting speakers on opposite sides of the cabinet.

The Auxilliary input control is a 10 turn potentiometer, this gives finer control of the input to the mixed signal.