From what I have been reading its better to know the head unit voltage its more reliable.

Your ears are more reliable. Plus the markings on the amplifier are usually off because they are just printed on all the same. So I would never trust just setting the amplifier to 4 volts (example) just because thats your headunit preout voltage.

From what I have been reading its better to know the head unit voltage its more reliable.

Your ears are more reliable. Plus the markings on the amplifier are usually off because they are just printed on all the same. So I would never trust just setting the amplifier to 4 volts (example) just because thats your headunit preout voltage.

With a dmm. They both get you close.

From what I have been reading its better to know the head unit voltage its more reliable.

Your ears are more reliable. Plus the markings on the amplifier are usually off because they are just printed on all the same. So I would never trust just setting the amplifier to 4 volts (example) just because thats your headunit preout voltage.

With a dmm. They both get you close.

Thats what I told him to do. But he needed to know the voltage to set it to. He didnt know how to figure out the correct setting.

From what I have been reading its better to know the head unit voltage its more reliable.

Your ears are more reliable. Plus the markings on the amplifier are usually off because they are just printed on all the same. So I would never trust just setting the amplifier to 4 volts (example) just because thats your headunit preout voltage.

With a dmm. They both get you close.

Thats what I told him to do. But he needed to know the voltage to set it to. He didnt know how to figure out the correct setting.

I am talking he can use a formula to figure the 38 volts using the head unit voltage and amp rating.

From what I have been reading its better to know the head unit voltage its more reliable.

Your ears are more reliable. Plus the markings on the amplifier are usually off because they are just printed on all the same. So I would never trust just setting the amplifier to 4 volts (example) just because thats your headunit preout voltage.

With a dmm. They both get you close.

Thats what I told him to do. But he needed to know the voltage to set it to. He didnt know how to figure out the correct setting.

I am talking he can use a formula to figure the 38 volts using the head unit voltage and amp rating.

You mean the way I told him?

OP here is the way to set it as given on this website. I already stated this.

Amplifier gain

From what I have been reading its better to know the head unit voltage its more reliable.

Your ears are more reliable. Plus the markings on the amplifier are usually off because they are just printed on all the same. So I would never trust just setting the amplifier to 4 volts (example) just because thats your headunit preout voltage.

With a dmm. They both get you close.

Thats what I told him to do. But he needed to know the voltage to set it to. He didnt know how to figure out the correct setting.

I am talking he can use a formula to figure the 38 volts using the head unit voltage and amp rating.

You mean the way I told him?

OP here is the way to set it as given on this website. I already stated this.

Amplifier gain

No different formula.

From what I have been reading its better to know the head unit voltage its more reliable.

Your ears are more reliable. Plus the markings on the amplifier are usually off because they are just printed on all the same. So I would never trust just setting the amplifier to 4 volts (example) just because thats your headunit preout voltage.

With a dmm. They both get you close.

Thats what I told him to do. But he needed to know the voltage to set it to. He didnt know how to figure out the correct setting.

I am talking he can use a formula to figure the 38 volts using the head unit voltage and amp rating.

You mean the way I told him?

OP here is the way to set it as given on this website. I already stated this.

Amplifier gain

No different formula.

I would like to know another formula

From what I have been reading its better to know the head unit voltage its more reliable.

Your ears are more reliable. Plus the markings on the amplifier are usually off because they are just printed on all the same. So I would never trust just setting the amplifier to 4 volts (example) just because thats your headunit preout voltage.

With a dmm. They both get you close.

Internet

Thats what I told him to do. But he needed to know the voltage to set it to. He didnt know how to figure out the correct setting.

I am talking he can use a formula to figure the 38 volts using the head unit voltage and amp rating.

You mean the way I told him?

OP here is the way to set it as given on this website. I already stated this.

Amplifier gain

No different formula.

I would like to know another formula

The voltage is 38.5. thats close enough.

Pmureika,

I would still like to know this other formula. Always nice to learn new things. Especially if it makes it easier to set amplifier gain correctly.

That tutorial leaves out some details. Not in its content or explanation, but the reality of recordings and ratings on amps it isn't what I'd do.

That tutorial leaves out some details. Not in its content or explanation, but the reality of recordings and ratings on amps it isn't what I'd do.

I believe that tutorial is a good start. But not an end all for setting the gain on the amplifier.

Pmureika,

I would still like to know this other formula. Always nice to learn new things. Especially if it makes it easier to set amplifier gain correctly.

Not voltage but speaker ohms make the difference.

Pmureika,

I would still like to know this other formula. Always nice to learn new things. Especially if it makes it easier to set amplifier gain correctly.

Not voltage but speaker ohms make the difference.

That is an ignorant statement. They both make a difference in this instance. Thats why I gave him an example. If he needs a different ohm load then he can adjust the formula. If the ohms change then the voltage changes also.

Pmureika,

I would still like to know this other formula. Always nice to learn new things. Especially if it makes it easier to set amplifier gain correctly.

Not voltage but speaker ohms make the difference.

That is an ignorant statement. They both make a difference in this instance. Thats why I gave him an example. If he needs a different ohm load then he can adjust the formula. If the ohms change then the voltage changes also.

Done cool your jets.

Thanks guys just gotta grab my buddies dmm from him and i should be good to go. Hopefully my gain changes the voltage, as it did not alter the output of the subwoofer.

*EDIT* could it have to do with settings in my headunit?

Edited September 23, 201113 yr by LazyFcuk

I would reccomend setting the gain when its all wired up to the box; if you are sitting there and turning the gain up on free air application you might have screwed something up. You should only free air a sub to see it works. You won't get an accurate idea of where your gains need to be when it is not in its enclosure and not loosened up. If you're within reason of power from your amp giving a healthy relationship to your sub then, your gains should start lower than half. You will notice it loosenening up after about 2-3 hrs of play time.