Putting some "full range drivers" in a ported box. In this box, I can hear frequencies around 70 Hz, but the volume seems to level out around 120 Hz. This was about 40 Hz lower than with the sealed box.
Documentation of the building of a "Loudred" speaker. The system runs off a 5 Volt, 2 amp wall wart. The 2.1 stereo amplifier is crossed over at 600 Hz, and driven by PAM8302A mono BTL amplifier boards from Adafruit. The smaller speakers for the ears are Tectonic TEBM35C10-4 2 inch, 4 Ohm full range drivers, and the center speaker is a Dayton Audio TCP115-4 4 inch, 4 Ohm woofer. The sound quality is pretty good.
Manchester Dream - Unknown artist Chances - by Silent Partner Hip_Bone by unknown artist Book Bag by E's Jammy Jams Backrub by unknown artist Hey Girl by Topher Mohr & Alex Elena Thor's Hammer by Ethan Meixsell
All of these songs can be found in the YouTube Music Library!
Track - Holy Sabbath Artist - Mossart Music Speaker - Council of Time - Michael
Mossart is a unique sound for the soul. This is a collection of audio compositions from Mossart Music, with each work of art expressing a period out of real time. He uses very exclusive and meticulous sounds to create a type of emotion that in some way we can all feel. Mossart Music is created with the holy spirit and all glory goes to our father, God who art in Heaven. Think of this as a soundtrack to the end times, we are all witnessing here on earth. We must always remember to honor and obey God's laws, as well as keep our faith strong, to fight against temptations that arise on a daily basis.
Genesis 24:27 "As for me, the Lord has guided me in the way."
A speaker designed for my office that is intended to be hung under a bookshelf. It is a 2.1 stereo that operates from a 5 volt power supply and uses 4 ohm speakers. The crossover frequency is set at 600 Hz using Sallen-Key filters implemented with 4580D audio opamps. I used three PAM8302 based mono amplifiers from Adafruit to drive the speakers. The two full range drivers are Visaton FR-58s which I chose for its flat response curve and low sensitivity of 81 dB. I wanted the sensitivity lower than the woofer ( a Dayton Audio 4" woofer with a sensitivity of 87 dB ) since I cut the gain on the center channel to avoid clipping. I was quite happy with the sound. The video sound test doesn't quite do it justice.
After travelling to New York City on a business trip, Russell Shoemaker wakes to find all electronic technology dead and more than 99% of the human race missing. Driven by a need to discover the truth and determined to return to his family, he embarks on a journey to his home in Seattle, while recording and telling all of the events in his journal.
A small addition to an audio amplifier to reduce pop when turning on the power. I'm using a TPA3118D2 based amplifier that I bought on eBay. I ended up using a 10uF capacitor and an SB130 diode because that is what I had in my spare parts box
I decided to borrow most of the components from the bi-amped active crossover speakers and use a tweeter instead of a full range driver. The crossover itself is a board that was made for an MP3 player for my son. I got three from OSH Park, so one for the MP3 player and two for these speakers. Overall, I am quite happy with these, but the bass is a bit strong. It may be good to stuff the box and dampen things out.
I added a simple bass boost circuit to the shelf speakers I made earlier. It is based on an LM833 audio op-amp. The intent was to increase the gain on frequencies below 100 Hz where the output of the speaker rolls off in hopes of extending the range a bit.
A speaker designed around the Tang Band W3-881SJF 3" full range driver. I plan on playing classical music with these speakers in my office. So the emphasis was on small size without a ton of bass. I am very pleased with the way these speakers turned out.