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<blockquote data-quote="i2ain2thunder" data-source="post: 7468725" data-attributes="member: 631331"><p>Why do so many people say this many channels or that many channels......none of that matters nearly as much as how much power you need at a given impedance....and that can be performed by amps with any number of channels.....channels can be bridged....speakers can be combined on channels. The number of channels aren't nearly as important as the amount of power and the features you need for your system.</p><p></p><p>short list of advantages/disadvantages of amps:</p><p></p><p>Mono-more often than not able to perform stable down to lower ohms due to no need for bridging technology.</p><p></p><p>2 Channel- able to provide power for subwoofers and speakers on different channels, though due to the demand of power of a subwoofer vs speakers it is rarely practical to use a 2 channel for more than 1 sub and 2-4 speakers. Can be useful for adding options for wiring 2 or more subs. May not be stable bridged at as low an impedance as it is per channel.</p><p></p><p>4 Channel-usually made for powering 4 or more speakers. Very versatile wiring options as well as bridging options, once again may not be as stable bridged as it is per channel per given impedance.</p><p></p><p>5 Channel+ are amps generally made for powering an entire system.</p><p></p><p>Amp features to look for:</p><p></p><p>Crossover filters- Low pass this takes out high frequencies at a given setting low pass filters are generally used for subwoofers to keep from recieving them harmful high frequencies.</p><p></p><p>High pass this takes out low frequencies at a given setting high pass filters are generally used for speakers to keep them from recieving harmful low frequencies.</p><p></p><p>The better your crossover settings, the better you system blends and more importantly the more life all your speakers/subs will have.</p><p></p><p>Crossovers are also found on middle to high end head units.</p><p></p><p>Gain allows you to set a level of output for the amplifier setting this correctly will ensure the safety of all speakers powered by the amplifier and will reduce distortion.</p><p></p><p>Subsonic filter like the high and low passes the subsonic is specifically designed to protect your subwoofer from extreme low frequencies that may be damaging.</p><p></p><p>Fuse rating in general you can calculate the true power of an amplifier better using their fuse rating and ignoreing their specifications for power, especially peak power, peak power is a marketing gimic and greatly, in some cases extremely overrated. RMS power is the general use power your continuous power and is generally more accurate, but due to standards for testing this may also be an exaggerated figure. By using the simple formula of watts=ampsxvolts you can get a more accurate guess for power output of an amplifier. Many use this formula assuming volts will be approx 10-14 Batteries are generally 12.5-12.8 resting voltage and most alternators are regulated at 13.5-14.4 volts. So multiply the amp's fuses by 10-14 and you will have a fairly accurate gauge for how much actual power that amp will put out.</p><p></p><p>Generally speaking 4 or more channel amplifiers have a mixture of these features that you can set for the front2 and rear 2 channels therefore allowing for flexibility with wiring different speakers that require different filters and power.</p></blockquote><p></p>
[QUOTE="i2ain2thunder, post: 7468725, member: 631331"] Why do so many people say this many channels or that many channels......none of that matters nearly as much as how much power you need at a given impedance....and that can be performed by amps with any number of channels.....channels can be bridged....speakers can be combined on channels. The number of channels aren't nearly as important as the amount of power and the features you need for your system. short list of advantages/disadvantages of amps: Mono-more often than not able to perform stable down to lower ohms due to no need for bridging technology. 2 Channel- able to provide power for subwoofers and speakers on different channels, though due to the demand of power of a subwoofer vs speakers it is rarely practical to use a 2 channel for more than 1 sub and 2-4 speakers. Can be useful for adding options for wiring 2 or more subs. May not be stable bridged at as low an impedance as it is per channel. 4 Channel-usually made for powering 4 or more speakers. Very versatile wiring options as well as bridging options, once again may not be as stable bridged as it is per channel per given impedance. 5 Channel+ are amps generally made for powering an entire system. Amp features to look for: Crossover filters- Low pass this takes out high frequencies at a given setting low pass filters are generally used for subwoofers to keep from recieving them harmful high frequencies. High pass this takes out low frequencies at a given setting high pass filters are generally used for speakers to keep them from recieving harmful low frequencies. The better your crossover settings, the better you system blends and more importantly the more life all your speakers/subs will have. Crossovers are also found on middle to high end head units. Gain allows you to set a level of output for the amplifier setting this correctly will ensure the safety of all speakers powered by the amplifier and will reduce distortion. Subsonic filter like the high and low passes the subsonic is specifically designed to protect your subwoofer from extreme low frequencies that may be damaging. Fuse rating in general you can calculate the true power of an amplifier better using their fuse rating and ignoreing their specifications for power, especially peak power, peak power is a marketing gimic and greatly, in some cases extremely overrated. RMS power is the general use power your continuous power and is generally more accurate, but due to standards for testing this may also be an exaggerated figure. By using the simple formula of watts=ampsxvolts you can get a more accurate guess for power output of an amplifier. Many use this formula assuming volts will be approx 10-14 Batteries are generally 12.5-12.8 resting voltage and most alternators are regulated at 13.5-14.4 volts. So multiply the amp's fuses by 10-14 and you will have a fairly accurate gauge for how much actual power that amp will put out. Generally speaking 4 or more channel amplifiers have a mixture of these features that you can set for the front2 and rear 2 channels therefore allowing for flexibility with wiring different speakers that require different filters and power. [/QUOTE]
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