$100 – $500
Prototype portable P.A. and D.J. speakers. Super loud and clear midbass and highs. All speakers and electronic parts supplied by Parts Express. Best used with a subwoofer crossed over @ 120Hz.
Small, light, high power, super loud, super smooth, musician’s & D.J. speakers. Features: Shimmering projected highs (even with this piezo!). Super tight mids & midbass.
Horn: Goldwood GT-1025. Mid driver: Eminence Alpha 4″-8ohm. Midbass: Dayton Audio DS-115-8ohm
12″x7″ sealed enclosure, isolated midrange and midbass.
I had a good time making these. It took a while. They kick-butt.
Tuned by ear, tried to keep phase shift in mind. The mid & highs are time aligned the midbass is not. 4.7uF cap to horn. .33mH coil & 33uF cap to mids. Midbass (lower spk) is straight signal in.
Tips & Tricks:
Use with powered subwoofer for total kick-buttness.
They kick-butt. The high-end audio cap took away the rasp from the horn. The sealed midrange rolls in at 600Hz and out at 4.7kHz with the coil. The mid reflector plates (reminiscent of the Altec A-7) project mids far. The midbass hits hard and is a straight line in. I don’t hear any distortion and the time alignment can’t be detected. These are 8 or 4 Ohm cabinets.
These are prototypes and many more improvements will be added.
About the Designer:
Lawrence Sepulveda (L.S. Audio) Machinist, electronic technician, musician.
Project Parts List: