Car audio ? If i have a 12 that max watts is 1500/750 rms and the amp is 2400/800rms will it blow my speakers?

Question

Car audio ? If i have a 12 that max watts is 1500/750 rms and the amp is 2400/800rms will it blow my speakers?

Answer 1

For the most part, you'll be fine. But, if you get sloppy with the install and the gain setting you do have some risk.

There are a few things you should know though.

First, You should use the Multimeter method to set your gain. It's actually very easy. You'll need a few tools. A digital multimeter and a 50hz test tone. Make sure that the test tone is recorded at 0db gain. You will also need to figure out the target output voltage of the amp.

There is a simple equation to calculate the target. It is the square root of the wattage times the final ohm load.  Example: 800rms x 4 ohms is 2400 and the square root of 2400 is 48.99.

Your target output voltage is 48.99 volts. This may change depending on your final ohm load.

Now that the is done it's time to move on to setting the gain. Here's a step by step.

1.) Turn all of the bass controls (boost, level, sub volume, etc.) on the head unit and the amp to zero.

2.) Disconnect the sub from the amp and disconnect all of the other speakers in the car to prevent damage. If you can just turn the other speakers off, this will work too. But, the sub needs to be disconnected.

3.) Insert the test tone cd and play it at 3/4 of the max volume on your CD player and set it to repeat.

4.) Connect the test leads from the multimeter to the output of the amp. Red to positive and black to negative, obviously.

5.) Slowly turn up the gain until you reach the target output voltage. Your gain is now set.

6.) Don't forget to turn down the volume before you reconnect everything and try it out.

The other thing I really want you to know is that under powering a speaker will in no way damage a sub. What do you think happens every time you turn down the volume? The sub will only get damaged by massive overpowering or by clipping from the amp. The amp will only clip if the gain is not set properly.

Lastly, I know this sounds a little confusing and like a giant pain. But, it is necessary. Properly setting the gain is the best thing you can do to protect the sub from damage.  

Answer 2

you can blow any speakers with any amp

If you send too much power to your sub, you risk damaging it. The cone of the speaker and the mechanical parts that make it move may break under the stress. Surprisingly, too little power can also damage your subwoofer — in fact, it's actually more common than damage caused by overpowering.

When the volume is turned up and the amp doesn't have enough power, the signal becomes distorted, or "clipped." This distorted signal can cause parts of the speaker to overheat, warp and melt. Not good!

You don't have to match speaker and amp wattages exactly. An amp with a higher output than the speaker's rating won't necessarily damage the speaker — just turn the amp down a bit if you hear distortion from the sub and don't run the speaker at extremely loud volumes for lengthy periods. Likewise, you'll be OK with a lower powered amp if you keep the volume down and don't feed a distorted signal to the sub

you will send the amp into clipping

Clipping

Clipping occurs when an amplifier is asked to deliver more current to a speaker than the amp is capable of doing. When an amplifier clips, it literally cuts off the tops and bottoms of the musical waveforms that it's trying to reproduce, thus the term. This introduces a huge amount of distortion into the output signal. Clipping can be heard as a crunching sound on musical peaks.

that causes distorted sound which will damage your subs