A well-respected kit; it totals about $260 with basic parts + MDF. Designed by Danny Ritchie, who is a very friendly guy and a frequent forum contributor (he has his own GR-Research forum on AudioCircle
?, for one). The two drivers used in the AV-1 are designed by him as well, I believe, and are well-praised.
The kit includes all of the parts you'll need except the cabinet; you can buy those in various states of assembly as well. The Sonicap upgrade is recommended; the Blackhole upgrade is optional and somewhat debated (PartsExpress
? damping sheets + mattress foam stuff seems to do the trick). Search the forums for more information about those.
This is available shielded to put it near a TV/monitor.
Searching on AV-1, AV1 or A/V-1 in the forums should yield quite a few results (also try audiocircle, audio asylum, madisound forums, and the other forums that I forgot about :) )
The speaker can be found here:
https://www.gr-research.com/performer/av1.htm
The kit page:
https://www.gr-research.com/performer/av1kit.htm