Also, we need to understand that, a amplifier with 5 Watt, 6 Watt or 10 Watt or even more is the RMS (Root Mean Square) wattage, delivered by the amplifier to a specific load in continuous operation. There are different choices as well as different segment of speakers are available in the market, generally with 4 ohms, 8 ohms, 16 ohms, and 32 ohms, out of which 4 and 8 ohms speakers are widely available in cheap rates. If the pipe gets bigger in diameter, the impedance will be low, so the speaker can get more wattage and the amplifier provide more power transfer scenario and if the impedance gets high then the Amplifier will provide less power to the speaker. The diameter is the effect created by the ohmic resistance and reactance. Now, if the pipe became bigger in diameter, the water will easily flow through the pipe, the volume of water will be bigger, and if we decrease the diameter, the less water will flow through the pipe, so the volume of water will be lower. Just think loudspeaker as a water pipe, the water flowing through the pipe is the alternating audio signal. Speaker impedance can be best understood using the relation between water flow inside a Pipe. In Audio electronics, different types of Loudspeakers are available in different wattage with different impedance. Impedance is the effective resistance of an electronic circuit or component for alternating current, which arises from the combined effects related to ohmic resistance and reactance. Power amplifier delivers AC output, due to this the impedance of the speaker is a critical factor for proper power transfer. Loud Speaker is a huge load which acts as an Inductive and Resistive load. ![]() Power amplifier output depends on the load impedance, so connecting an improper load could compromise the efficiency of the Power amplifier as well as the stability. The major load for a power Amplifier is the Loud Speaker. In case of Audio Amplifier system, the load and the load driving capacity of the amplifier is an important aspect in construction. Also, in some cases, where tone control is needed, the tone control circuitry is added before Power Amplifier. Generally, before Power Amplifier, the signal is corrected using Pre Amplifiers and Voltage controls amplifiers. Generally, the Sound Amplifier system uses below topology shown in the block diagramĪs you can see in the above block diagram, Power Amplifier is the last stage which is directly connected to the load. ![]() In an amplifier chain system, the power amplifier is used at the last or final stage before the load. In this tutorial, we will build a 100W RMS output power amplifier circuit using MOSFETs and transistors with a 4 Ohms impedance speaker connected to it. In sound electronics, the operational amplifier increases the voltage of the signal, but unable to provide the current, which is required to drive a load. It is designed to maximize the magnitude of the power f given input signal. Power amplifier is the part of audio electronics.
0 Comments
Leave a Reply. |