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<blockquote data-quote="its_ray_ray" data-source="post: 6367174" data-attributes="member: 596131">i have never actually used my dmm to set all settings on my amps. i have always been a &quot;by the ear&quot; kind of guy. well my old dmm took a shit on me. so i bought a new one yesterday. can anyone explain to me how to use this formula and what-not.i&#039;m going to be running the audiopipe ap-3002 i picked up. and i will be running it bridged @ 4 ohms.Can anyone explain how to use the forumla so i can tune my amp? lolAP-3002Frequency Response20Hz – 20kHzSignal to noise ratio110dBChannel separation&amp;gt;75dBTotal harmonic distortionSpeaker impedance2 ohm to 4 ohmInput sensitivity0.25V – 8VCrossover frequency55Hz – 5.5Khz 12dB stereoBass boost0 – 18dB @ 45HzOutput power (RMS)Stereo 2 CH – 160W x 2 @ 4 ohmsStereo 2 CH – 320W x 2 @ 2 ohmsBridged 1 CH – 640W x 1 @ 4 ohmsP = Power in wattsI = Current in amperesR = Resistance in ohms (effectively the nominal impedance)V = Potential in volts (Voltage)Knowns:Resistance (nominal impedance of your speakers)Power (desired wattage)Unknowns:Voltage (we&#039;ll measure this)CurrentFormulas:P = I*V (formula for power)V = I*R (Ohm&#039;s law)So after a little substitution to get Voltage in terms of simply power and resistance we getV = square_root(P*R)</blockquote>

[QUOTE="its_ray_ray, post: 6367174, member: 596131"] i have never actually used my dmm to set all settings on my amps. i have always been a "by the ear" kind of guy. well my old dmm took a shit on me. so i bought a new one yesterday. can anyone explain to me how to use this formula and what-not. i'm going to be running the audiopipe ap-3002 i picked up. and i will be running it bridged @ 4 ohms. Can anyone explain how to use the forumla so i can tune my amp? lol AP-3002 Frequency Response 20Hz – 20kHz Signal to noise ratio 110dB Channel separation >75dB Total harmonic distortion Speaker impedance 2 ohm to 4 ohm Input sensitivity 0.25V – 8V Crossover frequency 55Hz – 5.5Khz 12dB stereo Bass boost 0 – 18dB @ 45Hz Output power (RMS) Stereo 2 CH – 160W x 2 @ 4 ohms Stereo 2 CH – 320W x 2 @ 2 ohms Bridged 1 CH – 640W x 1 @ 4 ohms P = Power in watts I = Current in amperes R = Resistance in ohms (effectively the nominal impedance) V = Potential in volts (Voltage) Knowns: Resistance (nominal impedance of your speakers) Power (desired wattage) Unknowns: Voltage (we'll measure this) Current Formulas: P = I*V (formula for power) V = I*R (Ohm's law) So after a little substitution to get Voltage in terms of simply power and resistance we get V = square_root(P*R) [/QUOTE]

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