This is a vented enclosure design with 4” W4-2142 full range speaker driver.
The main characteristic comes from the W4-2142 driver, this 4” is low distortion and high efficiency. Different driver characteristic brings different sound performance. This 4” driver is very good for this vented enclosure design.
10 L enclosure volume is calculated by TB team, and this volume can allow W4-2142 driver to have great sound performance between 65 ~ 20K Hz.