Willing to get more ...... To celebrate the Grand Dragon car stereo store opening; Thanks for the new and old customers love; Our special launch high-quality anti-profit membership activities. Customers purchase the membership card number has reported rebate (rebate based on the number of purchase amount), there is no membership card to participate in the purchase of new and old customers to send a membership card (membership card purchase during the event to send the next purchase to enjoy). Time: December 25, 2014 to February 16, 2015; Activity Address: Zhengzhou Hongda Road Vehicle Industry Square Garden three districts layer C06; rebates products: the rebate based on the amount of purchase (purchase membership reached 1060 yuan to send 5 million pixels a tachograph), CD MP3MP5 machine, the more the amount of purchase, the more return Award; thank you, not only for profit to repay your kindness. (Final interpretation of the Dragon Jazz Sound) refers to the audio source through the power amplifier when the output signal due to non-linear elements caused more than the input signal additional harmonics. Harmonic distortion is caused because the system is not completely linear subwoofer, our percentage of the rms total harmonic component with the original signal with the new increase in RMS to represent. For example, the price of the subwoofer amplifier, an amplifier at the output of 10V Lv of 2000Hz 1000Hz Shiyou plus subwoofer amplifier, then there is 10% of the second harmonic distortion. All additional level of harmonics and total harmonic distortion called. In general, the total harmonic distortion at a minimum frequency of 1000Hz, so many products are the frequency distortion as its target. But the total harmonic distortion and frequency, and therefore the provisions of the Federal Trade Commission wholesale car subwoofer, total harmonic distortion must be 20 ~ 20000Hz measured out the entire audio range, and maximum power amplifier must load in 1974 was 8 European speakers, total harmonic distortion is less than 1% measured under the conditions. Minimum requirements for International Electrotechnical Commission predetermined total harmonic distortion as follows: pre-amplifier is 0.5%, 0.7% or less combined amplifier, but in fact can be 0.1% or less: FM stereo tuner 1.5% or less, in fact, 0.5% can be achieved; CD player can do more than 0.01%. Equipment installation 1, all the equipment is installed firmly to avoid prolonged vibration and loose. 2, rear power fuse box away from the audio signal lines. 3, the fuse box to the amplifier as long as the power cord is the best, so as not to generate a potential difference between the AC noise amplifier. 4, the installation location should be considered a good amplifier heat. 5. All speakers must do guard protection, especially woofers. 6, all the positive terminal of the power supply should be well protected. 7. All terminals should use the special connector plugged willing to get more ...... To celebrate the Grand Dragon car stereo store opening; Thanks for the new and old customers love; Our special launch high-quality anti-profit membership activities. Customers purchase the membership card number has reported rebate (rebate based on the number of purchase amount), there is no membership card to participate in the purchase of new and old customers to send a membership card (membership card purchase during the event to send the next purchase to enjoy). Time: December 25, 2014 to February 16, 2015 subwoofer amplifier price, Dragon MG car audio (certified), the subwoofer is provided by MG Car Audio Co., Ltd., Zhengzhou Dragon. MG Car Audio Co., Ltd., Zhengzhou Dragon (www.888ltj.com) is a leader in Zhengzhou, electronics, electrical products manufacturing equipment, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customers needs. Grand Dragon leader in car audio with the staff warmly welcome all inquiries negotiations to create the Grand Dragon car stereo a better future.