This build was the first to be added to the "DIY Showcase" on the Acoustic Elegance website:
The goal of this project was to combine the best attributes of all the high quality speakers I’ve heard over the years and see if I could make something even better. I also wanted a speaker that I wouldn’t feel the need to upgrade from after only a few years, so I needed a combination of tremendous output, ultra-low distortion, and ‘full range’ playback capabilities well beyond reference levels. These needed to handle music solo without the need of subwoofers to augment the low end, and my standards for bass are incredibly high!
Powering the (4) TD18H+ drivers is a Crest CC4000, and powering the BMS coaxials is a Lab Gruppen IPD 2400.
Final cabinet tune ended up being 25hz. Crossover point is 450hz.
Final outside dimensions of the boxes:
Height: 29.5" (tops and bottoms are doubled up on MDF (1.5" thick))
Depth: 29.25" (front baffle is 1.5" thick)
Ports: (2) 11.375" wide, by 1.5" tall, by 8.5" deep per box (depth includes 1.5" baffle).
Once stacked the speakers are 75" tall.