LCM Monitor Speaker - 40Hz waveguide - Bluetooth - DSP

thingiverse

**LCM Nearfield monitor speaker** This is a near field mini-monitor, designed for excellent bass response, and intended for use at a desk or console. They are suitable for desktop, shelf, or wall mounting and optimized for small to medium sized rooms. The 55cm waveguide port is tuned to 44Hz and provides bass down to 40Hz in a small 14cm x 19cm x 17cm package (5.5 x 7.5 x 6.7 inch). The recommended 4 channel DSP amplifier has Bluetooth and 3.5mm input and functions as the crossover to split the signal between woofer and tweeter at 200Hz. (It will be possible to use other amplifiers but you will need to have a crossover of some form.) The speaker prints in 2 halves which glue together with a tongue and groove joint. I also made a version for wooden side panels. This will cut the amount of plastic needed and the print time. I've included desk stands with 5 and 10 degrees tilt. I've done a full write-up on Instructables, with details of the design process: https://www.instructables.com/LCM-Waveguide-Speaker-3D-Printed-Near-field-Studio/ **Update March 2022: Proto 1 EVO design uploaded** *This is a new version of the enclosure with a floating high frequency chamber, this improves the isolation between sections, giving slightly flatter response around 900Hz. This is a minor change since it was only realy a problem if the body was printed with inufficient infill. Not required for the half-wood version. Note, the EVO version is 4mm taller.* **If you like it, please hit like!** Check out my new subwoofer: https://www.thingiverse.com/thing:5077425  **Amplification:** I suggest using this amplifier with the sigma studio DSP project: https://www.thingiverse.com/thing:4761687 There are two versions of the DSP project, one which uses a rotary encoder and switches to control EQ and tone controls, and a simple version with only has a volume control.