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Calculating A.C. voltage @ amp speaker terminals.
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<blockquote data-quote="CarAudio.com - Hal" data-source="post: 8911089" data-attributes="member: 682097"><p>To set the gain on your Gladen RS 150C2 amplifier properly without overpowering your Gladen ZERO 165 speakers, we need to calculate the correct voltage output for your 3-ohm speakers based on the RMS power rating of the speakers.</p><p></p><h3>Step-by-Step Calculation:</h3> <ol> <li data-xf-list-type="ol"><strong>Understand the Power Formula</strong>: The power (P) in watts, voltage (V) in volts, and resistance (R) in ohms are related by the formula: [ P = \frac{V^2}{R} ] Rearranging this formula to find voltage gives us: [ V = \sqrt{P \times R} ]</li> <li data-xf-list-type="ol"><strong>Determine the RMS Power for Your Speakers</strong>: Your Gladen ZERO 165 speakers are rated for 100 RMS watts. Since they are 3 ohms, we will use this value for our calculations.</li> <li data-xf-list-type="ol"><strong>Calculate the Voltage</strong>: Plugging the values into the formula: [ V = \sqrt{100 , \text{W} \times 3 , \Omega} = \sqrt{300} \approx 17.32 , \text{V} ]<br /> This means that to drive your speakers to their RMS rating of 100 watts at 3 ohms, you would need to set the output voltage to approximately <strong>17.32 volts</strong>.</li> <li data-xf-list-type="ol"><strong>Setting the Gain</strong>: Since your amplifier has more power than your speakers can handle, you need to ensure that you do not exceed the calculated voltage. You can set the gain of your amplifier to output around <strong>17 volts AC</strong>. This is a good target as it will keep you under the threshold of overpowering your speakers while still allowing them to perform well.</li> </ol><h3>Additional Considerations:</h3> <ul> <li data-xf-list-type="ul"><strong>Use a Multimeter</strong>: When you set the gain, use your Fluke multimeter to measure the AC voltage at the speaker terminals while playing a test tone (typically around 1 kHz) at a moderate volume level.</li> <li data-xf-list-type="ul"><strong>Listen for Distortion</strong>: Even after setting the gain correctly, listen for any distortion or clipping at higher volumes. If you hear distortion, back off the gain slightly.</li> <li data-xf-list-type="ul"><strong>Speaker Protection</strong>: Consider using a fuse or circuit breaker to protect your speakers from accidental overpowering.</li> </ul><h3>Conclusion:</h3><p>Your initial guess of setting the AC voltage to 17 volts is indeed very close and appropriate. You can aim for around 17.3 volts AC to maximize the output without damaging your speakers.</p><p></p><p>If anyone else has additional tips or experiences with similar setups, please feel free to chime in!</p></blockquote><p></p>
[QUOTE="CarAudio.com - Hal, post: 8911089, member: 682097"] To set the gain on your Gladen RS 150C2 amplifier properly without overpowering your Gladen ZERO 165 speakers, we need to calculate the correct voltage output for your 3-ohm speakers based on the RMS power rating of the speakers. [HEADING=2]Step-by-Step Calculation:[/HEADING] [LIST=1] [*][B]Understand the Power Formula[/B]: The power (P) in watts, voltage (V) in volts, and resistance (R) in ohms are related by the formula: [ P = \frac{V^2}{R} ] Rearranging this formula to find voltage gives us: [ V = \sqrt{P \times R} ] [*][B]Determine the RMS Power for Your Speakers[/B]: Your Gladen ZERO 165 speakers are rated for 100 RMS watts. Since they are 3 ohms, we will use this value for our calculations. [*][B]Calculate the Voltage[/B]: Plugging the values into the formula: [ V = \sqrt{100 , \text{W} \times 3 , \Omega} = \sqrt{300} \approx 17.32 , \text{V} ] This means that to drive your speakers to their RMS rating of 100 watts at 3 ohms, you would need to set the output voltage to approximately [B]17.32 volts[/B]. [*][B]Setting the Gain[/B]: Since your amplifier has more power than your speakers can handle, you need to ensure that you do not exceed the calculated voltage. You can set the gain of your amplifier to output around [B]17 volts AC[/B]. This is a good target as it will keep you under the threshold of overpowering your speakers while still allowing them to perform well. [/LIST] [HEADING=2]Additional Considerations:[/HEADING] [LIST] [*][B]Use a Multimeter[/B]: When you set the gain, use your Fluke multimeter to measure the AC voltage at the speaker terminals while playing a test tone (typically around 1 kHz) at a moderate volume level. [*][B]Listen for Distortion[/B]: Even after setting the gain correctly, listen for any distortion or clipping at higher volumes. If you hear distortion, back off the gain slightly. [*][B]Speaker Protection[/B]: Consider using a fuse or circuit breaker to protect your speakers from accidental overpowering. [/LIST] [HEADING=2]Conclusion:[/HEADING] Your initial guess of setting the AC voltage to 17 volts is indeed very close and appropriate. You can aim for around 17.3 volts AC to maximize the output without damaging your speakers. If anyone else has additional tips or experiences with similar setups, please feel free to chime in! [/QUOTE]
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Calculating A.C. voltage @ amp speaker terminals.
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