Reply to thread

Message

<blockquote data-quote="sumone" data-source="post: 578837" data-attributes="member: 551481">(E^2) / R = Pvoltage squared divided by resistance(nominal impedance in this case) equals power in watts.what were you playing (music or sine waves) and what volume was your HU at when you measured the voltage off the RCAs? @ 25/33 on mine (1.8V preamps), I get around .4 volts playing a 0dBFS 1khz sine wave. My amp probably never sees 1Volt from the HU. HUs don&#039;t put out the max voltage under normal conditions. they always have headroom for their bass &amp;amp; treble boosts and stuff. that&#039;s why if you turn up the HU ALL the way up, keep dsps &amp;amp; eqs off, and measure voltage, you still won&#039;t see the max voltage (and if analyzing with a scope, you&#039;d most-likely still see an unclipped sine wave).however, I have heard that some amps perform better at higher input voltages.to measure current, you&#039;d need a shunt. I don&#039;t know much about them but basically all I know is that they do something so that it enables you to measure higher amounts of current than a normal DMM can do by itself.</blockquote>

[QUOTE="sumone, post: 578837, member: 551481"] (E^2) / R = P voltage squared divided by resistance(nominal impedance in this case) equals power in watts. what were you playing (music or sine waves) and what volume was your HU at when you measured the voltage off the RCAs? @ 25/33 on mine (1.8V preamps), I get around .4 volts playing a 0dBFS 1khz sine wave. My amp probably never sees 1Volt from the HU. HUs don't put out the max voltage under normal conditions. they always have headroom for their bass & treble boosts and stuff. that's why if you turn up the HU ALL the way up, keep dsps & eqs off, and measure voltage, you still won't see the max voltage (and if analyzing with a scope, you'd most-likely still see an unclipped sine wave). however, I have heard that some amps perform better at higher input voltages. to measure current, you'd need a shunt. I don't know much about them but basically all I know is that they do something so that it enables you to measure higher amounts of current than a normal DMM can do by itself. [/QUOTE]

Verification