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Car Audio Equipment
Subwoofers
800 watt RMS sub, how much wattage do I really need?
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<blockquote data-quote="Polecat" data-source="post: 950209" data-attributes="member: 554260"><p>just wanted to add:</p><p></p><p>Heres a few more details without getting overwhelming.</p><p></p><p>How amps are classed depends on how the output transisters handle the + and - halves of the signal.</p><p></p><p>Class A: The transisters are always on. Very clean, ultra low distortion but they run very hot and are inefficent as hell. Thats why there soooo well.... HOT!</p><p></p><p>Basicaly alot of power goes in for very little output.</p><p></p><p>Class B: Use different parts of the circuit to deal with the + and - halves of the signal. The output transisters are always switching. They are more efficient and run cooler but have much higher distortion rates than class A.</p><p></p><p>Class A/B: are a combination of?? you guessed it A and B designs. The most widely used amps. Odds are if you own a amp its a class A/B. Good for any application. subs, mids and highs.</p><p></p><p>Class D: Use a design where the transistors are either on or off. Hence the marketing guys calling them "digital" They are not true digital but hey! They got away with it for awhile!</p><p></p><p>Class D amps are very efficient so they run cool but have high distortion rates kinda like class B's and have a limited frequencies responce. 20Hz to 200 Hz is normal. They work great for subs because they produce alot of power with less current, are small for the amount of power they produce and are cheaper per watt. The high distortion means very little with subs because the human ear does not hear distortion untill much higher levels at low frequencies.</p></blockquote><p></p>
[QUOTE="Polecat, post: 950209, member: 554260"] just wanted to add: Heres a few more details without getting overwhelming. How amps are classed depends on how the output transisters handle the + and - halves of the signal. Class A: The transisters are always on. Very clean, ultra low distortion but they run very hot and are inefficent as hell. Thats why there soooo well.... HOT! Basicaly alot of power goes in for very little output. Class B: Use different parts of the circuit to deal with the + and - halves of the signal. The output transisters are always switching. They are more efficient and run cooler but have much higher distortion rates than class A. Class A/B: are a combination of?? you guessed it A and B designs. The most widely used amps. Odds are if you own a amp its a class A/B. Good for any application. subs, mids and highs. Class D: Use a design where the transistors are either on or off. Hence the marketing guys calling them "digital" They are not true digital but hey! They got away with it for awhile! Class D amps are very efficient so they run cool but have high distortion rates kinda like class B's and have a limited frequencies responce. 20Hz to 200 Hz is normal. They work great for subs because they produce alot of power with less current, are small for the amount of power they produce and are cheaper per watt. The high distortion means very little with subs because the human ear does not hear distortion untill much higher levels at low frequencies. [/QUOTE]
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800 watt RMS sub, how much wattage do I really need?
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