Damage speakers by gain?

[MadAudio 10+ year member]

you just had your math wrong its (rmsxohms)sqrt your amp is 75x4 @ 4 ohms

so yo do one channel and it gives you the voltage for all of them so 1 75wrms @ 4 ohm channel is 75wrmsx4ohms=300 then sqrt =17.32 each channel should be set there .

 

[wilzyx 5,000+ posts]

how many watts do you want to your rears? the same?

 

[thejoker989 10+ year member]

With midrange speakers i would just set the gains by ear. It is very easy to tell when midrange speakers begin to distort. At least much easier that woofers.

Pick a song that you know really well and turn the gain on your amp all the way down. Next set the h/u to the volume number that you would prefer to be your theoretical maximum. Usually about 3/4 to 7/8 of your h/u max. Then turn the gain up until your speakers start to distort. And thats it.

 

[wilzyx 5,000+ posts]

With midrange speakers i would just set the gains by ear. It is very easy to tell when midrange speakers begin to distort. At least much easier that woofers.
Pick a song that you know really well and turn the gain on your amp all the way down. Next set the h/u to the volume number that you would prefer to be your theoretical maximum. Usually about 3/4 to 7/8 of your h/u max. Then turn the gain up until your speakers start to distort. And thats it.

or set it the right way

 

[Bolognablake 10+ year member]

Squeak, if you are going to continue flaming me in other people's posts, then you obviously are not worthy of my attention, and therefore, you have no reason to speak to me.

It's called damage control. Basically, he's letting people know that you're not a creditable source for information related to car audio. That way, there is less of a chance that people will damage their equipment via information from this forum.

I'm a moderator on JeepForum.com. If a user comes on the forum giving bad advice, especially if it is something unsafe (like ghetto-rigging a suspension lift), it's my job to let everybody know not to follow that particular user's advice. Because it's bad. I don't want someone, especially if they're a new Jeep owner, to leave JeepForum with a bad taste in their mouth because some moron gave them bad advice.

 

[Frankensuby 10+ year member]

Actually my 2 sets take 70 RMS, so I would need both a little less than full 75 RMS. Once I figure out and find the proper gain levels, I will turn the rear speakers down a bit to make the soundstage a little bit more to the front than the rear.

 

[wilzyx 5,000+ posts]

i would just set em both for the 75w rms, it wouldnt hurt em a bit.

 

[Frankensuby 10+ year member]

my HU is 22RMS*4ohms = 88/^2 = 9.4 gain?

so... that would make it bad to turn it past what volume?

 

[wilzyx 5,000+ posts]

my HU is 22RMS*4ohms = 88/^2 = 9.4 gain?
so... that would make it bad to turn it past what volume?

no, it matters what volume the head unit is at when you set the gains. if you set the gains with the volume all the way up, then you can turn your hu all the way up and it wont clip.

 

[Frankensuby 10+ year member]

ok, I think I understand it enough not to blow my speakers up, it's just common sense with the HU volume knob. When distortion arrives, turn it down I guess.

Thanks for everybody's time and patience //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif It is greatly appreciated

 

[Worlddre 5,000+ posts]

With midrange speakers i would just set the gains by ear. It is very easy to tell when midrange speakers begin to distort. At least much easier that woofers.
Pick a song that you know really well and turn the gain on your amp all the way down. Next set the h/u to the volume number that you would prefer to be your theoretical maximum. Usually about 3/4 to 7/8 of your h/u max. Then turn the gain up until your speakers start to distort. And thats it.

very much the wrong way to do things just because you do not hear it does not mean the amp is not clipping. setting gains with a dmm may not be equal to the oscope method but it is definately better then your suggestion

no, it matters what volume the head unit is at when you set the gains. if you set the gains with the volume all the way up, then you can turn your hu all the way up and it wont clip.

but the HU will def clip at full volume //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

 

[wilzyx 5,000+ posts]

ok then, use the tips we gave you and set the volume on the head unit to 3/4 of the way up when you set your gains and you should be fine.

 

[thejoker989 10+ year member]

or set it the right way

The right way would be with an o-scope. Not by assuming the manufacture has not overated or underated their amp. And I know it may be news to you but just because an amp claims so many watts it is rarely that. With my method (listening for distorion) at least you get the absolute most out of your amp.

Actually my bad. I assumed the op knows what distorion sounds like. But as seen by the responses, most posters are too noobish to know when a speaker begins to distort.

 

[wilzyx 5,000+ posts]

well o scopes are hundreds off dollars while a dmm can be had for less than 20. also i noticed you are from sacramento, what area?

 

[thejoker989 10+ year member]

well o scopes are hundreds off dollars while a dmm can be had for less than 20. also i noticed you are from sacramento, what area?

Ive seen one on craigslist for under $100. Im from the roseville area. Im just trying to point out that by relying directly on the rated output by the manufacture you are making a large assumption on the honesty of the manufacture and the capability of your electrical system.