frankenTheatre is my attempt to build a, hopefully, great-sounding audio system. I made a set of three-way speakers with each driver powered by its own amplifier and DAC. The subwoofer is a 2X12″ isobaric pair fed by its own amplifier and DAC. At the centre is a commercial DSP, ensuring each driver gets only the frequencies it needs. The Raspberry Pi streamer can play Spotify, network sources, internet radio or your phone and laptop through Bluetooth. I make no claims of being an expert; I’m just sharing my learning experience with FrankenTheatre.
Here are some photos from my FrankenTheatre project. Please leave your comments below!
12" Kicker Mystery Sub
12" Kicker Mystery Sub
2X12" Sub Cabinet
2X12" Sub Cabinet
Trialing the speaker dimensions
Marking the three-way cabinet
Marked the three-way cabinet
Printed the three-way cabinet port
Playing with the three-way cabinet port
The joys of 3D Printing
Wiring up the Speakers
Printing the Tweeter Housing
Printing the Tweeter Housing
Stacked!
An early design
An early design
The next prototype
Don't forget the Subwoofer feed!
Top: I found a counterfeit TPA3116D2
I found a counterfeit TPA3116D2
DACs connected via Pin Headers
A Raspberry Pi 4 feeding an ADAU1466 DSP via I2S
Left: Counterfeit LM875 from eBay
Showing all the dead counterfeit eBay LM1875s
Here's the latest prototype with vertically mounted DACs
JST-XH 5V Connectors
Testing...Testing...Testing
Here's the kit I use for JST-XH connectors
+/-19V Power Supply. Flyback Diodes added later
A view of the JST-XH power cables
Assembling the power supplies
Assembling the power supplies
Assembling the power supplies
Assembling the power supplies
Assembling the power supplies
The tweeter/midrange amps
The tweeter/midrange amps
5V Power Supply for the DSP and DACs. I removed these ferrite beads
PS, DSP and DACs
Time for testing