Joseph Audio Ponders the Fundamentals
The Joseph Audio people say their Insider is designed "to solve the fundamental problem of in-walls"--the tendency of tweeters and woofers to interfere with one another. There is secret sauce in the crossover and consistent off-axis response is a major benefit. Drivers are high-end stuff sourced from Norway. Presumably all that high-caliber design and materials justify the price of $2500/pair.