The old-fashioned acoustic manufacturer KEF has already seen the power of designing HiFi speakers for PCs. The British-style flavors of the main medium-high frequency and the endless trend of using the synthetic drums to fight the heart are very impressive. Recently, KEF released the M500 earphones and M200 earphones in Hong Kong. I wonder if this elegant gentleman style can be continued.
M500 is a single 40mm neodymium magnet unit driven headphone with response frequency of 20Hz~20kHz, sensitivity of 103dB±4dB, impedance of 32 ohms, and acoustic sealing ring for noise reduction. The earmuffs can be folded for easy storage, and the lightweight aluminum structure is matched with the memory foam earmuffs to ensure a good wearing experience.
The in-ear earphone M200 adopts a 5.5mm+10mm double moving coil unit. The internal design is unique. The 5.5mm neodymium magnet is responsible for the intermediate frequency and high frequency. The low frequency performance task is reserved for the rear 10mm woofer. The layout is very good to ensure the medium and high frequency resolution, highlighting a clear layering. The sensitivity and impedance of the M200 are smaller than the M500, which is 94dB ± 4dB and 12 ohms respectively.
The price of the M500 headset in Hong Kong is 2680 Hong Kong dollars (about 2100RMB), and the M200 is 1680 Hong Kong dollars (about 1330RMB). The price is a bit expensive, but the old brand of KEF is attached to it, biting its teeth, and the British HiFi is on the go. A kind of high-clean feelings that are not stained with mud are born.
Control Cable
Control cable is a kind of cable. It is used for control and monitoring circuits and protection circuits with AC rated voltage of 450V/750V and below. Shielded control cables are widely used in power plants and power stations due to their good shielding performance. They are intended to be laid indoors, in cable trenches, in pipelines, directly buried, in shafts and other fixed places that can withstand greater mechanical tension.
Feature
1. DC rated current Uo/U is 450/750V
2. The maximum allowable long-term operating temperature of the cable electrical conductor is 70 ℃.
3 The working temperature during cable laying shall not be lower than 0 ℃. If the natural environment temperature is lower than 0 ℃, the cable shall be heated.
4 The strongly recommended allowable bending radius of cable is below:
The unarmoured cable shall not be less than 6 times of the cable diameter;
Armored cable or copper foil shielded cable shall not be less than 12 times of cable diameter;
The shielded Flexible Cable shall not be less than 6 times of the cable diameter.
5 Productive cable model 2-61 cores
6 Control cables are generally laid in rooms, cable trenches, pipelines and other fixed sites.Copper Conductor PVC Jacket Control Cable,Armoured Control Cable,Multi Core Control Cable,Sheathed Control Cable
Ruitian Cable CO.,LTD. , https://www.hbruitiancable.com
