I love these two BR-1 kits especially the kit that includes the cabinet, and would recommend either for small rooms. However, I dispute the claim “Once you’ve completed this speaker project you will have learned the basics of speaker design”. Two of the things that concern me when changing vent dimensions are cone displacement and vent air velocity. The included tutorial does not raise these issues. I believe these concepts are basic. Here lies a perfect example. This architect and beginner speaker builder has altered the design by changing the vent. Design challenges include keeping within excursion limits of the driver, and keeping vent air velocities low enough to avoid turbulence.
The kits advertising claims, “We’ve included a tutorial that thoroughly explains the theory and design process, making this kit perfect for educational programs”. However, not discussed in the tutorial are the reasons to, offset and flush mount the drivers, and round the edges of the enclosures. Diffraction can have a very significant effect on fidelity. This elegant design employs these tweaks for this reason. The “components” kit accommodates builders who want to use their own unique enclosures, but buyers should be aware of compromising the design. Aside from this, I recommend these kits, as an entry-level speaker.

Also switched to a Yamaha 760A preamplifier at 80w 8 ohm. Seems to allow for fuller low end and to the top with no distortion.