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.
With each infection of a new strain of Dengue, a person is increasingly like to contract Hemorrhagic fever. After being bitten by an infected mosquito, it usually takes 5-7 days for the first symptoms to occur.Common symptoms include fever with headache, severe muscle pain, joint pain and rashes on the body.Until now, there has been no effective medicine or vaccine for dengue.ith each infection of a new strain of Dengue, a person is increasingly like to contract Hemorrhagic fever. After being bitten by an infected mosquito, it usually takes 5-7 days for the first symptoms to occur.