Modification Car Audio

In addition to the flow of SQ, audio system with categories SPL (Sound Pressure Level) is still pretty much demand. Applications subwoofer with a high level of violence or dB is the target audience to be achieved. Lately I catch the trend of SST is quite encouraging. After several years of this box model ported slot or hole dominate the box, now the trend box SPL switch to a system called bellmout Aeroport (bell mouth). A new trick dB SPL is raised significantly. “These systems use port system with a hole shaped like a bell, so called by bellmout. For one sub can reach 153 dB. Compared to the type of slots can be larger 4 dB, “There’s a pipe paralon wear size 8 inches, height 33 cm and the diameter of the mouth that looks like a pan of 15 cm. “To do this, do the tests. The results with 1 sub produce 149.5 dB, “. The test is performed to obtain a large dB level. To make the mouth of the pipe used fiberglass Aeroport model with 0.7 cm thick. Meanwhile, if the bell hole box system is obtained from the internet and there are tables bellmout hole size for her. “There is a mouth size, tube diameter, and height. For example, 6-inch pipe, the mouth 12 inches and 3 inches tall, “To remember, to model and size of the hole can be changed depending on the subwoofer is used. “Hence, should the experiment. If collected, timber for the unused tubes can be a truck, “To form a curve like a bell, made of paralon designed widened, and the section of the hollow given the putty. “The short length is recorded, and the voice of the most taut when tested, was used. Now workmanship