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<blockquote data-quote="Fast1one" data-source="post: 4386626" data-attributes="member: 567387">Unless he is running active and has drivers that are 95+db efficient, its not enough....Factor in crest factor and you need dynamic headroom of 8-20db depending on the recording. Account for impedance rise due to heat and we have an average loss of 3-5db or more in a car. Now factor in an average loss of 3-6db from ambient noise, which is fairly conservative, unless you have hundreds of pounds of Mass loaded vinyl or a substitute barrier pad combating this reality...You can quickly see how &quot;required&quot; power power will multiply with all these factors. Each 3db loss requires double the power. What people (including me once upon a time) do is simply raise the gain to get it average SPL to adequate levels. POOF, there goes dynamics...hence the flat sound...Not to mention over compression in many modern recordings (specifically Rock/Pop genres), which sound flat ANYWAY....IMO, you need atleast DOUBLE the power to have enough headroom for a given loudspeaker system. Just don&#039;t get too gain happy and watch that excursion...</blockquote>

[QUOTE="Fast1one, post: 4386626, member: 567387"] Unless he is running active and has drivers that are 95+db efficient, its not enough.... Factor in crest factor and you need dynamic headroom of 8-20db depending on the recording. Account for impedance rise due to heat and we have an average loss of 3-5db or more in a car. Now factor in an average loss of 3-6db from ambient noise, which is fairly conservative, unless you have hundreds of pounds of Mass loaded vinyl or a substitute barrier pad combating this reality... You can quickly see how "required" power power will multiply with all these factors. Each 3db loss requires double the power. What people (including me once upon a time) do is simply raise the gain to get it average SPL to adequate levels. POOF, there goes dynamics...hence the flat sound... Not to mention over compression in many modern recordings (specifically Rock/Pop genres), which sound flat ANYWAY.... IMO, you need atleast DOUBLE the power to have enough headroom for a given loudspeaker system. Just don't get too gain happy and watch that excursion... [/QUOTE]

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