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<blockquote data-quote="tinmanchris217" data-source="post: 6216639" data-attributes="member: 610505">1.&nbsp; Voltage Drop - You probably don&#039;t have the power/wiring to support the amp.&nbsp; Check the voltage drop on a burp/tone.&nbsp; If it goes less than 11.5, the amp will get hotter when producing the same power.2.&nbsp; You said *** twice... and one was *** package... I&#039;m waiting for that UPS box.&nbsp; //content.invisioncic.com/y282845/emoticons/veryhappy.gif.fec4fed33b4a1279cf10bdd45a039dae.gif3.&nbsp; Low Impedance - The w7 shouldn&#039;t kill the amp, unless you&#039;re running the 13w7 - dual 1.5 ohm coils, in parallel.&nbsp; Then you&#039;re impedance is 0.75, so wire in series.&nbsp; Check your DC resistance using a volt meter across the speaker terminals.@Fique:&nbsp; Lower impedance causes the amp to run less efficiently, and produce more power.&nbsp; This combination creates alot more heat.&nbsp; Class D amps can produce about 85 - 88% eff @ 4 ohm, but will be 70 - 75% eff @ 1 ohm... while outputting more than twice the power.&nbsp; According to rough calculations, that is 4 to 6 times the heat generated.</blockquote>

[QUOTE="tinmanchris217, post: 6216639, member: 610505"] 1. Voltage Drop - You probably don't have the power/wiring to support the amp. Check the voltage drop on a burp/tone. If it goes less than 11.5, the amp will get hotter when producing the same power. 2. You said *** twice... and one was *** package... I'm waiting for that UPS box. [IMG]//content.invisioncic.com/y282845/emoticons/veryhappy.gif.fec4fed33b4a1279cf10bdd45a039dae.gif[/IMG] 3. Low Impedance - The w7 shouldn't kill the amp, unless you're running the 13w7 - dual 1.5 ohm coils, in parallel. Then you're impedance is 0.75, so wire in series. Check your DC resistance using a volt meter across the speaker terminals. @Fique: Lower impedance causes the amp to run less efficiently, and produce more power. This combination creates alot more heat. Class D amps can produce about 85 - 88% eff @ 4 ohm, but will be 70 - 75% eff @ 1 ohm... while outputting more than twice the power. According to rough calculations, that is 4 to 6 times the heat generated. [/QUOTE]

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