Calculating A.C. voltage @ amp speaker terminals.

[my2006c6 10+ year member]

Picked up a new amp and new 2 way 6.5 component speakers. And ive always set gains by math calculations and using my good fluke meter and set A.C. volts at amp speaker terminals... BUT now my new amp has more power than my 6.5 components and trying to figure out voltage spec to set gain.
The new amp is a Gladen RS 150C2 and here are specs

Stereo Power RMS @ 4 Ohm	2 x 150W
Stereo Power RMS @ 2 Ohm	2 x 230W

And my new speakers are Gladen ZERO 165, 6.5 (2 WAY) But they are 3 ohms which makes it harder to calculate . and specs are

• 2x 150/100 Watt = which is 100 RMS, and max 150
• 3 ohm impedance...
• So with speaker being 3 ohms, i would need to calculate it somehow.... My BEST guess so im not over powering the speakers would be setting A.C. voltage at amp speaker terminal to ,, 17 ac volt ??? Looking for input and if i may be close on my calculations.

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[CarAudio.com - Hal AI Bots]

Picked up a new amp and new 2 way 6.5 component speakers. And ive always set gains by math calculations and using my good fluke meter and set A.C. volts at amp speaker terminals... BUT now my new amp has more power than my 6.5 components and trying to figure out voltage spec to set gain.
The new amp is a Gladen RS 150C2 and here are specs

Stereo Power RMS @ 4 Ohm	2 x 150W
Stereo Power RMS @ 2 Ohm	2 x 230W

And my new speakers are Gladen ZERO 165, 6.5 (2 WAY) But they are 3 ohms which makes it harder to calculate . and specs are

• 2x 150/100 Watt = which is 100 RMS, and max 150
• 3 ohm impedance...
• So with speaker being 3 ohms, i would need to calculate it somehow.... My BEST guess so im not over powering the speakers would be setting A.C. voltage at amp speaker terminal to ,, 17 ac volt ??? Looking for input and if i may be close on my calculations.
• 
  

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.

Step-by-Step Calculation:​

1. Understand the Power Formula: 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} ]
2. Determine the RMS Power for Your Speakers: Your Gladen ZERO 165 speakers are rated for 100 RMS watts. Since they are 3 ohms, we will use this value for our calculations.
3. Calculate the Voltage: 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 17.32 volts.
4. Setting the Gain: 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 17 volts AC. This is a good target as it will keep you under the threshold of overpowering your speakers while still allowing them to perform well.

Additional Considerations:​

• Use a Multimeter: 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.
• Listen for Distortion: Even after setting the gain correctly, listen for any distortion or clipping at higher volumes. If you hear distortion, back off the gain slightly.
• Speaker Protection: Consider using a fuse or circuit breaker to protect your speakers from accidental overpowering.

Conclusion:​

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!

 

[my2006c6 10+ year member]

Let's calculate the voltage you should set for your new amp and speakers.

Not sure what your trying to tell me

 

[my2006c6 10+ year member]

Thanks

 

[administrator]

Not sure what your trying to tell me

Sorry, Hal is a little under the weather today.

 

[my2006c6 10+ year member]

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.

Step-by-Step Calculation:​

1. Understand the Power Formula: 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} ]
2. Determine the RMS Power for Your Speakers: Your Gladen ZERO 165 speakers are rated for 100 RMS watts. Since they are 3 ohms, we will use this value for our calculations.
3. Calculate the Voltage: 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 17.32 volts.
4. Setting the Gain: 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 17 volts AC. This is a good target as it will keep you under the threshold of overpowering your speakers while still allowing them to perform well.

Additional Considerations:​

• Use a Multimeter: 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.
• Listen for Distortion: Even after setting the gain correctly, listen for any distortion or clipping at higher volumes. If you hear distortion, back off the gain slightly.
• Speaker Protection: Consider using a fuse or circuit breaker to protect your speakers from accidental overpowering.

Conclusion:​

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!

Ill calculate my new sub amp the same way as it has more RMS than my sealed sub.
Amp for sub is a Gladen SPL 1000C1 And my sub is a IMAGE DYNAMICS IDQ12 V.4 D4 and 750 RMS.
So ill set voltage at terminal to 38.79

Power in RMS:
@ 4 ohm mono @ 2 ohm mono	1x 540 Watt 1x 980 Watt

SPL 1000C1​

 

[ThxOne Premium Member]

Hang on to this...

 

[my2006c6 10+ year member]

Hang on to this...

View attachment 68529

So i was doing it correctly. Thanks for confirming. . Was told i might be able to give my sub a little more in its sealed box but ill see

 

[ThxOne Premium Member]

So i was doing it correctly. Thanks for confirming. . Was told i might be able to give my sub a little more in its sealed box but ill see

Those numbers on the chart are exact. You can use a volt or two more if you don't hear distortion. For subs I would use a -10db tone and the corresponding exact voltage on the chart. For that little extra headroom.