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Thread: How do I drop volume from a speaker?

  1. #1
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    How do I drop volume from a speaker?

    Here's an interesting question. I have a 99 Jeep Grand Cherokee and the factory system was originally a 6 channel system. 2 in the front doors, 2 in the rear, and then they have 2 really small tweeter-like speakers in the dash. The factory amp was also 6 channel.

    So what I did, was wire the dash speakers in along with the front door speakers. The problem is that those dash speakers are way too loud and puts out way too much treble. I think the factory amp had been adjusted to put out less volume to those dash speakers.

    So, how do I reduce the current going to those dash speakers since they are wired into the front channel with the front door speakers? I need to put something in the line going to those little guys.

  2. #2
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    Quote Originally Posted by unsavory
    Here's an interesting question. I have a 99 Jeep Grand Cherokee and the factory system was originally a 6 channel system. 2 in the front doors, 2 in the rear, and then they have 2 really small tweeter-like speakers in the dash. The factory amp was also 6 channel.

    So what I did, was wire the dash speakers in along with the front door speakers. The problem is that those dash speakers are way too loud and puts out way too much treble. I think the factory amp had been adjusted to put out less volume to those dash speakers.

    So, how do I reduce the current going to those dash speakers since they are wired into the front channel with the front door speakers? I need to put something in the line going to those little guys.
    Thow in a L-PAD on each tweeter-like speaker and you will be good to go. Here is a site that will calculate the resistor vaules you need for the L-PAD That site also has a link at the bottom to let you know what wattage they need to be. They recomend a bit high if you ask me. I would say 10 watts for R1 and 20 watts for R2 should be plenty, unless you are running a ***** load of power to them. I have used these values before many, many times and I was using a 100x2 amp for the highs. I hope this helps.
    Steve

  3. #3
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    Great! Thanks for the info. OK, but what the heck does all that mean? lol. I don't know the ohm rating of those speakers. Is it safe to assume 4? And what does attenuation mean?

    What is an L-Pad and do I have to actually make it? Or can I just buy them?

    Thanks.

  4. #4
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    Quote Originally Posted by unsavory
    Great! Thanks for the info. OK, but what the heck does all that mean? lol. I don't know the ohm rating of those speakers. Is it safe to assume 4? And what does attenuation mean?

    What is an L-Pad and do I have to actually make it? Or can I just buy them?

    Thanks.
    You can take a multi-meter and measure the ohms that the speaker is. Make sure it is unplugged from everything else when you measure it. Attenuation is how much quieter you want it. I would say 6db is a good starting point. An L-PAD is circuit that is made up of the two resistors. See if you have a 4 Ohm speaker and you have an amp that puts out 25 watts at 4 ohms then you speaker will be getting 25 watts. If you use the same amp and an 8 ohm speaker you amp will put out have as much power and your speaker will only be getting 12.5 watts. If you use a 2 ohm speaker your amp will put out 50 watts. So, you use a L-PAD circuit to make the speaker quieter without changing the original impendence(ohms) the amp sees. If you really wanted a simple way and do not care about retaining the original value then just put a 4 ohm 20 watts resistor in-line on one of the terminals of the speaker. If you have a 4 ohms speaker then adding a 4ohm resistor will make 8 ohms total and will half the power to the speaker. But either way you go a simple resistor or L-PAD, half the power goes to the resistors and thats why you need a 20 watt resistor. Radio Shack used to sell L-PADs but I dont know if they do any more.
    Steve

  5. #5
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    Woot. Thanks for the information Steve. That helps. I'll give it a shot.

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