The trick in building a vented box is to get the right size enclosure and the right size vent. You can't be too far off on either of these factors or your speaker's performance will suffer. In particular, using a too-small box or a too-high vent tuning frequency can eliminate bass instead of increasing it.
Symptoms, which usually begin four to six days after infection and last for up to 10 days, may include. 1  Sudden, high fever. 2  Severe headaches. 3  Pain behind the eyes. 4  Severe joint and muscle pain. 5  Fatigue. 6  Nausea. 7  Vomiting.
How Long do Dengue Rashes Last. Dengue fever is an acute viral disease, caused by mosquitoes carrying dengue virus. It is characterised by skin rashes, high fever, severe headache and muscles aches throughout the body. Among other s... Dengue fever is an acute viral disease, caused by mosquitoes carrying dengue virus.