Yiyi PR100MKII in-ear headphones violent dismantling

The PR100MKII features a dual diaphragm design with two independent sounding diaphragms on one side. What is the internal structure of this headset? How does the double diaphragm work? We carried out a violent dismantling of the masses and loved them for study and study. From the dismantling situation, PR100MKII does use two diaphragms, one of which is the diaphragm of the drive, and the other is a separate diaphragm, which is located at the back of the earphone housing, at first glance The passive diaphragm designs that are often seen in miniature speakers are very similar, but in reality they are essentially different: the independent diaphragm of the PR100MKII is not intended for vocalization, but for controlling the pressure inside the chamber. Thus, a design that adjusts the pressure balance inside and outside the chamber has advantages and disadvantages as compared with the more common way of opening.

ECCI Yiyi PR100MKII In-Ear Headphones - Take off the silicone case

ECCI é€¸æ›¦PR100MKII In-Ear Headphones-Driver

ECCI Yiyi PR100MKII In-Ear Headphones

ECCI 100PR100MKII In-Ear Headphones - Independent diaphragm at the rear of the housing

ECCI Yiyi PR100MKII In-Ear Headphones - Two Diaphragms

ECCI Yat-Sen PR100MKII In-Ear Headphones - Drive Magnet Magnetic Demo

A USB HUB is a device that expands a single Universal Serial Bus (USB) port into several so that there are more ports available to connect devices to a host system, similar to a power strip .

USB hubs are often built into equipment such as computers , keyboards , monitors , or printers . When such a device has many USB ports, they all usually stem from one or two internal USB hubs rather than each port having independent USB circuitry.

Physically separate USB hubs come in a wide variety of form factors : from external boxes (looking similar to an Ethernet or network hub ) connectible with a long cable, to small designs that can be directly plugged into a USB port (see the "compact design" picture). In the middle case, there are "short cable" hubs which typically use an integral 6-inch cable to slightly distance a small hub away from physical port congestion and of course increase the number of available ports.

Laptop computers may be equipped with many USB ports, but an external Usb Hub can consolidate several everyday devices (like a mouse and a printer) into a single hub to enable one-step attachment and removal of all the devices.

USB HUB

Usb3.0 Hub,Usb2.0 Hub,Usb-C Hub,Usb3.1 Type-C Hub

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