seevef.blogg.se - 4 channel amp subwoofer

Driving your amp with a strong, high-quality audio signal means you can turn down the amp gain and keep noise to a minimum, too. Generally speaking, an amp with good sound quality will have the least amount and will be more difficult to hear. In a system with great tweeters and good sound reproduction, it’s easy to hear the amp’s noise if you turn up the gain very with no music playing. Noise in an amplifier is to be expected – all amps have it! However, a good amp is designed to keep the noise low and the music signal high. It’s common to see better brands list the SNR with no signal output and also at 1 watt power output, where it tends to be lower.Īn enlarged image of the internal noise produced by a car amp (zoomed in for better viewing). For example, it’s unfortunately pretty common for many to exaggerate their specs or they don’t list all of the ratings at certain power output levels. However, it’s important to know that the specs can be a bit misleading. Some of the best list their specs at 100dB and above. Amps with great sound quality tend to be listed as having an SNR of 90dB and above, in my experience.

Generally speaking, the higher the number, the better. Good amplifiers have a higher signal-to-noise (SNR) ratio. The SNR, listed in decibels (dB) is a way of comparing how much audio signal the amp has vs the amount of electrical noise it has internally. It’s also more noticeable with the amp’s gain turned up. Background noise exists in all amplifiers and appears as a slight “hiss” when you listen with no music playing. The best, depending upon the rating used, will be 100dB and higher. A 4 channel amplifier with good sound quality will have a number around 90dB and above. Ideally the amount of noise will be low compared to the audio signal level. The signal-to-noise ratio (SNR), rated in decibels (dB) is a way comparing the amount of audio signal to the level of noise signal in a car amplifier.

Root Mean Square (RMS) power rating per channel.

Built-in crossovers/crossover specifications.

There are several basic factors to check when choosing a great-sounding 4 channel amplifier: It’s important to have at least some understanding of what the specifications actually mean, what kind of power rating you need, and what you can generally expect to pay. The best sounding car amplifiers have a number of important features you should be aware of before buying. What to look for in amps with good sound quality Note that 4 channel amps are usually more compact than other models (especially class D amps). This basically just amplifies the very small signal from your stereo to a higher voltage that can drive speakers with a lot of power. These supply the amplifier transistor stages which are fed with the signal from your stereo. Both work the same way: the +12V supply is “stepped up” (increased) to a higher voltage with both positive and negative outputs. 2 channel vs 4 channel car amplifier diagramĭiagram showing the basic differences between a 2 and a 4 channel car amplifier. You need to be careful when shopping to ensure the amp you’re buying meets your needs. These types of details vary from brand to brand and model to model. Some 4 channel amps are configured slightly different than others and have additional options like bass boost or crossovers that can only be used for 2 of the 4 channels. Most today also are “bridgeable” – that is, they can be connected to drive a single speaker load from 2 channels for more power. This is useful if connecting to a head unit with only 2 channels available in order to drive 4 channels of power.

Many 4 channel amps also feature a 2/4 channel input switch. They’re a bit more compact as they incorporate 4 (instead of 2) independent audio amplifier signal paths and amplifier sections. While similar, 4 channel models are built slightly differently. That’s largely related to Ohm’s law and the basics of electrical power. This is because when only 12V is available, a speaker can’t be driven with much power. This is necessary to create more power for the speakers you use. Just like 2 channel (or single-channel “mono block” amps) they contain a power supply with steps up the +12V battery voltage to a higher one. However, there are a few differences you should be aware of.

A 4 channel car amplifier, as you may have already guessed, is extremely similar to most 2-channel (stereo) car amplifiers.