Reply to thread

Message

<blockquote data-quote="VereChronicus" data-source="post: 1429099" data-attributes="member: 565864"><p>To make things even harder to understand, there is no actual standard. There are standards that companies can choose to adhere to if they choose, but there is no law to force them to do so. This simply means that the box can say that the subs are 4000w rms per coil and in reality they may only handle 475w rms. Max power handling for speakers is just an indicator of what they can handle via their weakest link. Again this number can be fudged by the manufacturer. Reputable brands most often stick to a more realistic standard: CEA. The CEA 2006 standard is great for subwoofers, but it has not stayed for amplifiers. It has changed 3 times since its inception as far as amplifier output power rms rating with different distortion levels. Still not sure there myself, so compliance has got to be obviously hard for manufacturers.&nbsp; If you want a quick, easy way to think about OHMS: blocks of resistance. Each speaker has blocks of resistance.....how many is its OHMS. Each amplifier is made to make full rated rms power output into a given block of OHMS. If you want an amp that is rated to produce 400w rms into 4ohms, then you need to get a sub or subs that equal 4ohms by wiring it or them one way or another.</p></blockquote><p></p>

[QUOTE="VereChronicus, post: 1429099, member: 565864"] To make things even harder to understand, there is no actual standard. There are standards that companies can choose to adhere to if they choose, but there is no law to force them to do so. This simply means that the box can say that the subs are 4000w rms per coil and in reality they may only handle 475w rms. Max power handling for speakers is just an indicator of what they can handle via their weakest link. Again this number can be fudged by the manufacturer. Reputable brands most often stick to a more realistic standard: CEA. The CEA 2006 standard is great for subwoofers, but it has not stayed for amplifiers. It has changed 3 times since its inception as far as amplifier output power rms rating with different distortion levels. Still not sure there myself, so compliance has got to be obviously hard for manufacturers. If you want a quick, easy way to think about OHMS: blocks of resistance. Each speaker has blocks of resistance.....how many is its OHMS. Each amplifier is made to make full rated rms power output into a given block of OHMS. If you want an amp that is rated to produce 400w rms into 4ohms, then you need to get a sub or subs that equal 4ohms by wiring it or them one way or another. [/QUOTE]

Verification