Choosing an amplifier with a MOSFET installed will help your power efficiency and audio quality. A high-quality MOSFET (metal-oxide-semiconductor field-effect transistor) is designed to handle high power levels, giving you high efficiency at low voltage. It’s a good idea to go for a well-known brand name to ensure quality and prevent overheating issues. This will mitigate the problem of overdriven and distorted speakers and give you plenty of extra power for the bass response and additional tweeters. If you want to connect an additional sub-woofer, going with 75 watts or more will be safer. However, for more dedicated audiophiles, 50 watts probably won’t do it. Although bridging channels for a higher power output is possible, it will leave you with fewer speaker options. For the average user who is not relying on massive bass output with sub-woofers, a 50-watt RMS rating will give you volume and clarity. A higher-quality class D will produce less of this signal noise, but it will cost you. Because of how they function, when the gain is up, there is a noticeable hiss from the speakers. The one drawback of class D amps is the noise. They are also almost 90% efficient in some models, resulting in less heat than A/B amps. They benefit from fitting into a much smaller chassis, making them far more compact and allowing them to be stowed away conveniently under the seat. However, class D amplifiers are catching up quickly to the audio quality produced by A/B class amplifiers. Class D amps have yet to come close regarding accurate sound production. Until recently, these amps have always been the go-to due to their superior audio quality, lack of noise and distortion, and full-range application. These amplifiers are usually around 60% percent efficient, and the transistors inside are on only around half the time, even when no audio signal is present. Too much heat equals a burned-out amplifier. The power that’s drawn and not used for the output of audio creates heat. It can never put out more power than it draws. An amp’s efficiency rating is the ratio of what it can put out divided by its power consumption. Every amp will consume more power than it can feasibly put out. The amplifier class is defined by how the amp combines the power and signal. Class D amps will give you far more efficiency but less audio quality. Class A/B amps are the least efficient but offer the best sound fidelity. The main difference comes down to efficiency. A/B Class and D classĪnother important consideration is the amplifier class. It also gives you far cleaner audio quality. This blocks frequencies from getting to speakers that cannot handle them, preventing distortion and blown speakers. A high-pass crossover allows frequencies above the cut-off frequencies to pass through to your speakers.Ī low-pass crossover allows frequencies below the chosen cut-off. It’s even better if they are adjustable but not essential. Ideally, you want your amplifier to have high-pass and low-pass crossovers. However, there are several factors to consider when buying a four-channel amplifier. You can ignore the flashy terms and technical jargon we have you covered! We’ve compiled a list of the best four-channel amplifiers available to help you make the right decision for your needs. Terms like “high-pass crossover” and “ohms” can make you just want to stick with your standard car stereo. Alternatively, two channels bridged together will give you more power for sub-woofers.įinding the right amp to fulfill your dreams of window-shattering bass can be confusing. You can connect two speakers to each channel, which will give you the option of having up to eight speakers. One significant advantage of a four-channel amplifier is the option for bridging channels. A four-channel amp will give you the most flexibility, power, and seat-shaking bass potential. One of these components is a separate amplifier, which will help your speakers produce the best sound they can. To get the best audio experience possible in your car, you’ll need to bring together a few key components that depend on each other for optimal music reproduction.
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