![]() ![]() It’s measured in decibels (dB) and helps you to decide between a better product and a lower-performance product. Signal to noise ratioĪ signal-to-noise (SNR) measurement describes the ratio of the level of noise (undesired) to the desired musical signal. You’ll also want the ability to block distortion-causing bass by using high-pass crossovers on your tweeters or midrange speakers. For most applications, I recommend 50W RMS per channel minimum. Sound quality and the signal-to-noise (SNR) specsīasically, you’ll want an amp with good sound quality that can give a decent amount of power.What to shop for in good quality car ampsįor mids and highs, it’s ideal to focus a few basic factors when shopping: Not that 4 channel amps are normally more compact than 2 separate 2-channel amps of the same type. These voltages are then used to drive speaker outputs which are an amplified version of the input signals from your car stereo. ![]() Both work exactly the same way: a +12V supply from the battery is boosted (“stepped up”) to create a higher positive and negative voltage supply. 2 channel vs 4 channel car amplifier diagramĪ diagram I’ve provided illustrating the differences between 2 and 4 channel amplifiers. The specific features you’ll find vary from brand to brand and model to model. Some also feature different options like a bass boost for the rear channels (normally #3 & 4). Because of this, they offer more flexibility for custom car audio systems than a single 2-channel amplifier can. This means that if you have a source unit with only 2 RCA jack outputs you can still get 4 channels of sound to use from the amp.Īdditionally, most 4 channel amps sold today are bridgeable, meaning that each pair of channels can be used to drive a single speaker for more power than each individual channel can provide. In order to work in more applications, some 4 channel amps feature a 2/4 channel input switch. For example, car stereos can only use about 12V to drive speakers, resulting a lower power that distorts easily.Īccording to Ohms law more power requires a higher voltage and that’s exactly what powerful car amps are designed to use.Ĥ channel amps are also a bit more compact in size as the additional 2 channels take up a bit less space than 2 separate 2-channel amps used separately. That’s necessary to provide sufficient power that can drive your component speakers or highs and mids at a better volume with low distortion. Just like standard 2-channel amps, they contain a special section that steps up a vehicle’s 12V supply to deliver a higher one (often around positive and negative 28 volts or so) The main difference is that 4 channel amps contain a 2nd pair of amplification stages to boost the input signal and drive speakers. There are a few differences to know about when shopping and just to have a better understanding. ★ 5 of the best amps for mids and highs ★Īs you might have already guessed, 4-channel amps are a bit different than others.What to shop for in good quality car amps. ![]()
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