ForMedia » Blog Archives

Tag Archives: small stereo amps

Technology and Gadgets

A Couple of Suggestions In Order To Help Understand The Noise Performance Of Recent Music Amps

Published by:

When you have narrowed down your search by glancing at several key criteria, including the amount of output power, the size of the amplifier as well as the cost, you will still have quite a few products to choose from. Now it is time to look at some of the technical specifications in more detail. The signal-to-noise ratio is a rather essential spec and describes how much noise or hiss the amp creates. One technique to do a simple check of the noise performance of an amp is to short circuit the amplifier input and then to crank up the amplifier to its utmost. Next listen to the speaker that you have attached. The static that you hear is created by the amplifier itself. While glancing at the amp spec sheet, you want to look for an amplifier with a large signal-to-noise ratio figure which indicates that the amplifier outputs a small level of noise. One of the reasons why small stereo amplifiers make noise is the fact that they utilize elements like transistors and resistors which by nature produce noise. Typically the elements that are located at the input stage of an amplifier are going to contribute most to the overall noise. Therefore manufacturers generally are going to pick low-noise elements whilst developing the amplifier input stage. Many of recent amps are based on a digital switching architecture. The noise signal at other frequencies is eliminated through a bandpass filter during this measurement.

A weighting is a method of expressing the noise floor in a more subjective fashion. This technique was developed with the knowledge that human hearing perceives noise at different frequencies differently. An A-weighted signal-to-noise ratio weighs the noise floor according to the human hearing and is generally larger than the unweighted signal-to-noise ratio.


How Much Power Do You Want From Your Audio Power Amplifiers?

Published by:

Some of the technical jargon which amp companies make public often are deceptive and do not necessarily offer a good indication of the real performance of the amp. The higher this figure the louder your speakers. Based on your application, you can choose a small amp delivering merely a few watts or a bigger one offering several hundred watts. Most home radios only come with amplifiers which have several watts output power which regularly is sufficient for a small space. Please note that a lot of mini amplifiers will begin clipping the music once the audio reaches higher wattage. If you want to enjoy low-distortion audio then you may want to choose an amplifier which is going to give you higher wattage than you will really require. A number of specs are going to present the wattage in “Watts peak” while others are going to display “Watts rms”. On the other hand, “peak power” can frequently be misleading because there is no standard showing the amount of time that the amp must be able to deliver this level of power. Still, whereas the rms spec will tell you more about the amplifiers actual performance, be certain though that the amp offers a peak power rating that is substantially bigger than the rms rating. the power envelope of the audio is going to change over time. Amplifiers have a limited output voltage swing as a result of the fixed internal supply voltage. As such the highest output power will differ depending on the speaker impedance. If the maximum power is not referenced to a loudspeaker impedance, you should get in touch with the producer.

%d bloggers like this: