Public address PA speaker Indoor column speaker Y-10/20/40/60/80

Public address PA speaker Indoor column speaker Y-10/20/40/60/80

Description:

1.Material:aluminum crust,aluminum grill and plastic cover

2.Is 2.5 inch speaker

3.Full frequency with speaker,acoustic quality is clear

4.Alloy casing,hard and durable

5.Beautiful  looking, easy to install

Model:Y-10/20/40/60/80

Size of the speaker:2.5inchx2/2.5inchx4/2.5inch x6/2.5inch x8/2.5inch x10

Rated power:5W/10W/15W/20W/25W

Max power:10W/20W/30W/40W/50W

Sensitivity:88db

Frequency response:150-15000Hz

Input voltage:70V/100V

Net weight:  1.5KG/2.4KG/2.6KG/3.1KG/3.5KG

Gross weight: 13.5KG/20.7KG/22.3KG/26.3KG/8.5KG

Product dimension:

105*105*260/105*105*400/105*105*544/105*105*684/105*105*830mm

Packing dimension:

50.5*44*29(16pcs)/44*42*29(8pcs)/50.5*44*29(8pcs)/57.5*44*29(8pcs)/63*21*13

PA speaker public address Bathroom ceiling speaker(Y-306)

PA speaker public address Bathroom ceiling speaker(Y-306)

Y-306 is 3 inch speaker ,ABS casing;can be made as waterproof

Model:Y-306

Frequency response:80-2000Hz

Input voltage :70V/100V

Sensitivity:94db

Speaker size:3inch 

Net weight:0.41KG

Gross weight:12.2KG

Rated output power:1.5-3W  

Install dimension:Ф99mm

Product dimension:Ф121*96mm

Packing dimension:630*260*285(30PCS)

How to Select the Best Audio Amplifier for Your Design

How to Select the Best Audio Amplifier for Your Design

 

An audio amplifier increases the amplitude of a small signal to a useful level, all the while maintaining the smaller signal's detail. This is known as linearity. The greater the amplifier linearity, the more the output signal is a true representation of the input.

With the ever-changing performance requirements for amplifiers in the audio market, there have been many advances in audio amplifier topologies. Consequently, designers must know the types of audio amplifiers available and the characteristics associated with each. This is the only way to ensure that you select the best audio amp for an application. In this tutorial, we examine the most important characteristics of each class of audio amp available today: Class A and Class B, .

Class A Amplifiers

The simplest type of audio amplifiers is Class A. Class A amps have output transistors (Figure 1) that conduct (i.e., do not fully turn off), irrespective of the output signal waveform. Class A is the most linear type of audio amp, but it has low efficiency. Consequently, these amps are used in applications that require high linearity and have ample power available.

Figure 1. A Class A audio amp is typically associated with high linearity but low efficiency.

Class B Amplifiers

Class B amplifiers use a push-pull amplifier topology. The output of a Class B amp incorporates a positive and negative transistor. To replicate the input, each transistor only conducts during half (180°) of the signal waveform (Figure 2). This allows the amp to idle with zero current, thereby increasing efficiency compared to a Class A amp.

There is a trade-off that comes with a Class B amp: the increased efficiency degrades audio quality. This happens because there is a crossover point at which the two transistors transition from the on state to the off state. Class B audio amps are also known to have crossover distortion when handling low-level signals. They are not a good choice for low-power applications.

Figure 2. With a Class B audio amp, the output transistors only conduct during half (180°) of the signal waveform. To amplify the entire signal, two transistors are used, one conducting for positive output signals and the other conducting for negative outputs signals

How to Choose the Right PA System ?

As a performing musician you want a PAsystem that can deliver your sound with clarity and definition. But with so many different pieces of equipment designed for different live performance needs, it can be difficult to know just what it is you should be looking for.

Certainly, there are a lot of variables to consider when choosing a PA. For instance, you'll need to think about the size of your audience, where your performances will be, how portable you need your system to be and how much money you can invest.

This guide will help walk you through these and other important considerations to help you find the gear that's right for you, whether you're buying your first PA system or looking to add equipment to your existing system.

In short, a PA system—more formally, public address system, and also known as a sound reinforcement system—is an electronic amplification system used to get sound from the performer(s) to the audience. It's made up of several components, and while one system can vary greatly from the next, each one handles these same basic functions:

1.    Converting acoustic sound into electronic signals, most often with microphones or line inputs.

2.    Processing and mixing these electronic signals, using mixing boards and effects modules

3.    Amplifying signals with a power amp

4.    Delivering the sound through speakers

5.    Monitoring the performance with speakers or in-ear monitors

Different PA equipment will have different capabilities, features, and designs associated with each of these functions. Your specific needs will determine what you want out of each.

Contact:Kerry Luo

E-mail:dongchuangyp001@126.com

How to carry out the daily maintenance of public address equipment?

How to carry out the daily maintenance of public address  equipment?

There are some following reasons:

 The normal operating temperature of the public address equipment shall be 18 ~45 degree. The temperature is too low will reduce some machines sensitivity ;if it is too high, it's easy to burn out components, or the premature aging components. Especially in the summer ,pay more attention to ventilation cooling and the appropriate temperature. Avoid direct sunlight, avoid near the heat source, such as heater. Reset the function keys after used it. If the function keys are not reset for a long time, the tension spring is in the state of stress, and it is easy to cause malfunction.

 Minimize the volume's potentiometer of the power amplifier before switching the power supply,   , this is the most effective way to protect  power amplifier and pa speaker  The power of the power  amplifier is almost zero at this time, at least when the error is not caused damage to the pa speaker.

 Booting also has regulations in order to from before to after that first opened the CD player and reopen the front stage and the back stage, the boot when the amplifier volume potentiometer spin to a minimum. Shutdown first off the power amplifier, the power amplifier amplification function completely shut down, this time you again to switch off the front end equipment, no matter big impact current also won't fry and power amplifier and speakers. The same to the shutdown of power amplifier volume potentiometer back to the smallest, then close the front stage and the CD player off or after.

 Use the public address equipment often. The commonly used but can prolong the life of the machine, such as belt motor parts (tape seat, CD player, DVD etc.). If the long time does not rotate, but also some mechanical deformation.   

 To power on a regular. if it is not used in a long time, especially in the humid, high temperature season, the best power for half an hour a day. So when the components inside the machine work produced heat to get rid of moisture, avoid broken damp mildew inside the coil, loudspeaker voice coil, transformer and so on.

Every a period of time to with a clean, damp soft cotton cloth wipe the surface of the machine; when not in use and application of dustproof cover tarpaulins or the machine on the cover to prevent dust from entering.

Kerry Luo

Dongchuang International Industrial Limited

Add: No1 Gonghe Road,Shaxi Huangqi,Nanhai,Foshan,Guangdong,CHINA

Tel: 86-757-88773347

Email: dongchuangyp001@126.com

 Skype:dongchuangyp001

 Wechat: LYY112126

 What's app: 86-13074253684

QQ: 2850632517

 Web: http://www.dongchuangyp.com/

http://www.dcpublicaddress.com