50 Watt Amplifier
The described circuit is a general-purpose 50-watt audio amplifier designed to accommodate various audio sources, including line-level devices such as radios, TVs, and stereo systems. The amplifier's versatility is enhanced by the inclusion of a dedicated phono input, which allows for connection to unamplified audio sources like record players, guitars, and microphones.
The circuit typically employs a power amplifier stage capable of delivering 50 watts of output power, which is suitable for driving small to medium speakers. The input stage may consist of operational amplifiers or transistor-based circuits that provide necessary gain and impedance matching for the audio signals. A key feature of this amplifier is its low-pass filter, which can be integrated at the input stage. This filter is particularly beneficial when the amplifier is used with a subwoofer, as it allows only low-frequency signals to pass through, effectively enhancing bass response while eliminating higher frequency noise.
In terms of components, the amplifier circuit will usually include resistors, capacitors, and inductors that define the frequency response and stability of the amplifier. The power supply section is critical, as it provides the necessary voltage and current to the amplifier stages, typically requiring a regulated power supply capable of handling the load demands at 50 watts.
Overall, this amplifier design is characterized by its simplicity and effectiveness, making it an excellent choice for hobbyists and audio enthusiasts looking to build a reliable audio amplification solution.This is a handy, easy to build general purpose 50 watt amp. The amp has an input for a radio, TV, stereo or other line level device. It also has a phono input for a record player, guitar, microphone or other un-amplified source. With the addition of a low pass filter at the input, it makes a great amp for a small subwoofer. 🔗 External reference
Related Circuits
The i-St@r presents a simple mini audio amplifier circuit schematic utilizing the LM386 low voltage audio power amplifier IC. This circuit is designed to power medium-sized speakers from a music player that typically drives only earphones (LM386 headphone). The...
This design utilizes a well-established circuit topology for the power amplifier, employing a single-rail supply of approximately 60V and capacitor coupling for the speaker(s). The benefits for a guitar amplifier include a straightforward circuitry design, even for relatively high...
The amplifier operates across the 2-30 MHz band with a relatively flat gain response and reaches gain saturation at approximately 210 W of output power. Both input and output transformers have a 4:1 turns ratio (16:1 impedance ratio) to...
This low-noise microphone amplifier is built with the MAT02 produced by PMI. This microphone amplifier is highly efficient and features a very low noise level. The amplification can be set to either 20 dB or 23.5 dB (10x or...
This 60-W, 28-V broadband amplifier operates within the 225-400 MHz military communications band. The amplifier can function independently as a 60-W output stage in a 225-400 MHz transmitter. Alternatively, by utilizing two of these amplifiers in conjunction with quadrature...
This series-feedback configuration of components provides a high input impedance and stable, wide-band gain video amplifier suitable for general-purpose applications. Below is the schematic representation of the circuit. The described video amplifier circuit employs a series-feedback topology, which is instrumental...