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<blockquote data-quote="PollyCranopolis" data-source="post: 1879210" data-attributes="member: 553423"><p>I believe you turn your deck up 80%, with amp crossovers off, deck processing off, speakers disconnected from amp, gains set to 0. Set your voltmeter to measure AC. Take one channel of the amp, and put the voltmeter ends aganst the postive and negative sides of the channel. Slowly turn up gain until volt meter registers desired voltage while playing a 0 db or -3db test tone. 1000hz for highs, 60 hz for subs. Turn HU down, reconnect speakers, and add desired processing at deck.</p><p></p><p>Use equation to get desired voltage beforehand: Voltage=Sqrt(power*resistance).</p><p></p><p>Eg: 90 watt rms speakers, 110 watt per channel amp. Use the lower of the 2 for power, multiply by resistance. Eg: 90*4(4ohm speaker)=360. Take Sqrt of 360, = 18.97 volts.</p></blockquote><p></p>
[QUOTE="PollyCranopolis, post: 1879210, member: 553423"] I believe you turn your deck up 80%, with amp crossovers off, deck processing off, speakers disconnected from amp, gains set to 0. Set your voltmeter to measure AC. Take one channel of the amp, and put the voltmeter ends aganst the postive and negative sides of the channel. Slowly turn up gain until volt meter registers desired voltage while playing a 0 db or -3db test tone. 1000hz for highs, 60 hz for subs. Turn HU down, reconnect speakers, and add desired processing at deck. Use equation to get desired voltage beforehand: Voltage=Sqrt(power*resistance). Eg: 90 watt rms speakers, 110 watt per channel amp. Use the lower of the 2 for power, multiply by resistance. Eg: 90*4(4ohm speaker)=360. Take Sqrt of 360, = 18.97 volts. [/QUOTE]
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