TV set in our living room has replaced by will of an adult of my family. It gets thinner but screen size gets larger, so my previous speaker(FT38D+FW127 double bass reflex) is required to be down sized. So I decide to build this one as the result.
The concepts of this time are...
Bass reflex must be fit to these three themes and 4inch class full range unit must be fine. I researched the line-up of Tang Band products, which is one of major today.
As of this time, 4inch unit available in Japan are
The result of Googling, many pages on W4-930SG are found, but less on other two models. I discussed with shop staff. I told him that I'm planning to mount on 7l box, he told me that W4-930SG requires 15l. He advised me to use W4-657SH. I concerned a few days and then accepted his recommendation. After some design trial, it gots 15cm x 24cm x 26cm = 8.6l.