Luna

Smarter Speaker

Key Components

Main Speaker

RS125-8 5" Reference Woofer 8 Ohm

This will handle the mids and lows and will be pointed down

Second Speaker

ND16FA-6 5/8" Neodymium Dome Tweeter 6 Ohm

This will habndle the highs and will be pointed up

Combined Amplifier and DAC

HiFiBerry Amp 2

The Raspberry Pi’s built-in audio can be noisy. A DAC provides much cleaner sound quality.
Mount it onto the Raspberry Pi and you have a stereo audio system. You only have to connect your loudspeakers. It provides up to 60W power. You only need a single 12V power supply to power the Raspberry Pi and the Amp2. It powers the Raspberry Pi, there is no need to add an external 5V power supply to the Raspberry Pi.

Power Supply

A 12V–24V DC power supply for the amplifier.

Crossover

Dayton Audio XO2W-2.5K 2-Way Crossover 2,500 Hz

A crossover is an electronic component used in speaker systems to divide the audio signal into separate frequency ranges and send them to the appropriate speaker drivers.

Lighting

DC24V/12V High Density COB Color Chasing Lights Addressable RGB LED Strip

Single lighting circle around the speaker - will need configuration somehow/where

Signal Flow Diagram

1. Raspberry Pi
   • Outputs the digital audio signal.
2. HiFiBerry DAC+Amp (Amp2)
   • Converts the digital signal to analog (DAC functionality).
   • Amplifies the analog signal for the speakers.
3. Crossover
   • Input: Receives the full-range amplified audio signal from the Amp2.
   • Outputs:
     • Sends low and mid frequencies to the woofer.
     • Sends high frequencies to the tweeter.
4. Speakers
   • Woofer: Plays the low and mid-range sounds.
   • Tweeter: Plays the high-frequency sounds.

What Luna should look like:

1. Luna would be a circular, tower-like design
2. There will be 4 vertical supports on the outside
3. The very bottom would be a base about half an inch thick and include the input for the power supply and the power will run up one of the 4 supports to the electronics layer.
4. Layer 1, above the base, will be a vertical cone (with the point of the cone pointing upwards to redirect the audio out 360 degrees.
5. Layer 2 will be the woofer pointing downwards towards the cone on layer 1.
6. Layer 3, above the woofer will be a very narrow circular light ring, all the way around the tower. It will not be on the outside (it will be flush with the tower). It will more than likely be a High Density COB Color Chasing Lights Addressable RGB LED Strip.
7. Layer 4, above the light ring will be the electronics layer: The raspberry pi zero 2 w, the hifiberry (amp and dac), the respeaker2 (mic array) and the crossover.
8. Layer 4, above the electronics layer will be the tweeter pointing upwards.
9. Layer 5, above the tweeter will be another cone with the point pointing down towards the tweeter to redirect the audio outwards.

Setup

Install PulseAudio or ALSA on the Raspberry Pi for audio management. Use software EQ (equalizer) to tune the sound based on your setup. Microphone Integration

The ReSpeaker 2-mic array uses I2S input for audio capture and wake-word detection. It won’t interfere with the speaker output but will need proper placement to avoid feedback (e.g., place it away from the woofer or inside an acoustic shield).