W3-1878 is a well performance and iconic 3” full range bamboo paper cone speaker driver of TB Speaker products.
This is vented enclosure design for W3-1878.
In order for great sound quality, this design also included a plastic port.
SUG1-05 compare to SUG1-01( back loaded horn design) has smaller enclosure size, faster and dynamic sound performance. But low bass is not as good as back loaded horn design.