USB EMI Noise Suppressor Filter Signal Purifier Enhancer 4 USB DAC Audio Device

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USB EMI Noise Suppressor Filter Signal Purifier Enhancer 4 USB DAC Audio Device
Product Description
Warm Tip:
Before placing an order, please make sure that the noise of your audio device is generated or introduced from USB interface rather than from other places. For non-USB interface noise, this filter will not work! This filter can attenuate the noise coming from USB interface by about 5dB, which can be measured by oscilloscope and spectrum analyzer. In order to avoid unnecessary disputes, the quality of this filter is measured by this criterion (as for whether this is suitable for your environment, please judge for yourself, just as the manufacturer of scalpel can only guarantee the scalpel's quality. It is not guaranteed that the surgeon who uses the scalpel will succeed in every operation. The buyer should pay for the return of the goods due to this reason (after all, the return postage is more expensive than the filter, and more expensive is the time wasted by this toss). So if you can't accept this, please don't place an order to avoid wasting your time. There is also that the filter itself does not have miniUSB data line, you need to have another miniUSB line to connect computers and filters. Many miniUSB data lines used in early MP3 are USB 1.0 standard, which can not run 2.0 speed. If you use this line, you will only introduce more noise and boom, because the audio data transmission is wrong. With the rise of PC HiFi, various kinds of USB digital interface and DAC audio devices are constantly emerging. The traditional PC motherboard is designed according to the standard of digital circuit. Because the anti-interference ability of digital circuit is much better than that of analog circuit, the new USB audio equipment must face the USB interface of motherboard which has extremely bad power supply and signal environment. This brings a lot of challenges to the design of USB audio devices. A little carelessness will introduce digital noise into audio playback, which will increase the noise of the device, reduce the resolution and deteriorate the sound quality. At present, the design capability of USB audio equipment manufacturers on the market is uneven, and the technology of large factories is strong, which has been considered thoroughly for a long time. However, some small factories are limited to the reasons of technical strength limitation and cost. To treat this part is to save money and save money. As a result, the indicators of the products are greatly discounted. This USB filter is aimed at these audio equipment products which do not do well in USB noise suppression. It can make up for the design deficiency of the original product by the simplest way of plug-in. This filter suppresses the noise of USB power supply, ground wire and signal line in all directions. The power supply part uses PI filter circuit of CLC structure; the ground wire isolates the ground wire of USB interface and USB audio equipment through special magnetic beads, and suppresses the ground noise of USB to the ground of the device; the signal part advances the common mode interference of USB data line through special common mode inductance. Effective suppression was performed. The filter can support low speed (1.5 Mbps), full speed (12 Mbps) and high speed (480 Mbps) modes of USB, and can be used for all audio devices with USB 2.0 and below on the market. The filter is quite simple to use, as long as the USB audio device is connected to the A-port of the USB filter, and then the B-port of the filter is inserted into the USB interface of the PC through the MINIUSB cable. Some unknown customers asked why the filter did not directly use a USB A-type public connector like a U-disk instead of a miniUSB seat. What trouble it is to add a miniUSB cable to the filter. The reasons are as follows: this filter is as rigid as USB devices such as U disk and wireless network card, and has little space for deformation and buffer. It is easy to break when it meets abnormal bending force, and even breaks the USB interface of notebook and super-notebook when it is serious. Usually, the probability of accidental encounter of USB devices such as U disk and wireless network card after insertion is not very large, so the impact is not serious, and this filter is different. In addition to rigid PCB like U disk and wireless network card, there is a USB data line connected to audio equipment behind, which will be abnormally implicated and fettered by external force transmission. The connection between the filter and the computer USB interface greatly increases the probability of filter breakage and USB interface damage, so the purpose of adding a relatively flexible miniUSB data line between the computer and the filter is to reduce the damage caused by this abnormal situation and improve the reliability of the device; perhaps some users will say that the filter using the USB head can also be connected with another USB. Buffer the data line of the male base. Yes, that's true, but how many users won't plug in the USB interface of the computer directly after they get the USB filter of the head, but go to the data line with a big deal of trouble and then use it again? If the filter uses miniUSB seat, the user can not use it without miniUSB data line. This ensures that the user must use the filter in the link with flexible buffer to avoid or mitigate the loss caused by unexpected circumstances. These are the considerations of using miniUSB interface when designing filters here.
NOTE:
because of the Components`s price is high,we Pricing the item 16.46,if the Components`s price go down,we will change the price lower.
package including:1*USB EMI Noise Suppressor Filter USB Signal Purifier for USB DAC Audio Device
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To avoid unpaid item dispute,all payment must be received within 7days from the end aiction.
Note:Please list your special requests (color, packages, etc.) in the EBAY/PAYPAL NOTES SECTION when you make payment.
Delivery details
>tems will be shipped within 1~2 business day after payment received.
> Items are shipped from China using Airmail, delivery time depends on destination and other factors,reach most of the countries within 10 to 35 business days.
> if you choose the standard shipping method or SpeedPAK the item will get to you with in 20 days.
Country
Shipping Way
Shipping Time
Tracking Number
United States
SpeedPAK
7-18
Yes
Russian
Post by Air Mail
15-35
Yes
Other Country
Post by Air Mail
15-45
No
Brazil / Africa
Post by Air Mail
35-65
No
Terms of sales
To keep our quality service high, please make sure you read our returns and payment policies carefully before bidding or buying. We do try our best to help customers with any questions that they may have.
We stand behind our products 100% and carefully inspected by us.
Customers may request for an exchange or refund less shipping & handng within 30 days of receipt.
Return of non-defective or wrongly purchased items will be subject to a 20% restocking fee.
Product must be returned in is original packaging.
Buyers are responsible for paying the return shipping & handing charges for any replacement or refund request.
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Have peace of mind knowing that your order will arrive brand new in its original factory sealed packaging. That means that you'll have the full force of the manufacture warranty to protect your purchase.
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To meet different requirements for different clients, we have over 300 models with multi functions for your selection.
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