Clipping ?

[mtrycrafts]

Clipping only occurs when you try and draw more power from teh amplifer than the power supply can support. What that does in effect ( from a picture point of view) is to square off the tops and bottoms of a sine wave. This squaring of the signal produces an infinte number of very high frequency components which in effect is almost DC as far as the tweeter is concerned. This DC causes the voice coils of the tweeters to overheat and burn out. For more info..

http://en.wikipedia.org/wiki/Clipping_(audio)

What burns out the tweeters is the amount of power it is getting after the onset of clipping. the RMS power goes from the .707 of peak and becomes 100% with 100% clipping which equates to 2X power of that original power rating. And, tweeters are very low power capable to begin with. I seriously doubt that a 1/2 watt of square wave would burn out the tweeter.
Since there is a reversal in a sine wave from pos to neg, it is not really DC, just a longer duty cycle, much longer and still AC.
And, the amount of those odd harmonics also increase from the onset to full clipping as you indicated.

 

[highfigh]

I really see no reason to go further than that.

Because you can?

 

[Lordoftherings]

What burns out the tweeters is the amount of power it is getting after the onset of clipping. the RMS power goes from the .707 of peak and becomes 100% with 100% clipping which equates to 2X power of that original power rating. And, tweeters are very low power capable to begin with. I seriously doubt that a 1/2 watt of square wave would burn out the tweeter.
Since there is a reversal in a sine wave from pos to neg, it is not really DC, just a longer duty cycle, much longer and still AC.
And, the amount of those odd harmonics also increase from the onset to full clipping as you indicated.

Would having the Mute ON from your amp with the Master Volume level cranked to max, and then release the Mute button to OFF, cause a little distraction to the tweeters? With a Heavy Metal CD playing of course.

Yep, that's what I also thought, after getting nailed for $400 for my two tweeters.

* I muted my amp for a small break (pee time), while that CD was still playing. Then my very nice brother was looking for a bit of back ground music, instead of totally muted. So, without knowing that the Mute button was on (on my remote), he simply raised the Master Volume to try gettting some misic (music), but he just kept crank it up. Then, I came back from the bathroom, and he ask me, hey Bob, how do you get misic from that thing? Well, I said, you have to get the Mute button OFF... You guess the rest...
Talk about a sudden death dose of adrenaline going to our ears, our brains, our hearts, and my tweeters.

Any of you had a similar experience?

* Oh, by the way, that amp was delivering normally about 300 watts per channel into my
4-ohm speakers. But the way we did it, was a very sudden death. I don't really care how many watts or what, I just know that it's a no no.

 

[3db]

What burns out the tweeters is the amount of power it is getting after the onset of clipping. the RMS power goes from the .707 of peak and becomes 100% with 100% clipping which equates to 2X power of that original power rating. And, tweeters are very low power capable to begin with. I seriously doubt that a 1/2 watt of square wave would burn out the tweeter.
Since there is a reversal in a sine wave from pos to neg, it is not really DC, just a longer duty cycle, much longer and still AC.
And, the amount of those odd harmonics also increase from the onset to full clipping as you indicated.

I'm not saying its dc but it might as well be as far as the tweeter is concerned . A long duty cycle contains more power just liek you eluded. Its another wa of looking at. I just didn't want to get all mathematical here.

 

[Lordoftherings]

So mtrycrafts is the guy I'm waiting a response from, hopefully. Or any other member for that matter. About what to not do, to fry your tweeters.

 

[mtrycrafts]

I'm not saying its dc but it might as well be as far as the tweeter is concerned . A long duty cycle contains more power just liek you eluded. Its another wa of looking at. I just didn't want to get all mathematical here.

I didn't get mathematical at all Or, was that 2x it?

 

[mtrycrafts]

So mtrycrafts is the guy I'm waiting a response from, hopefully. Or any other member for that matter. About what to not do, to fry your tweeters.

Yes, that will do it for sure, no matter what

Or, place a test tone CD and go just a bit over your limits, say 17k and see if you can hear it at a higher level, like a JND test
Get the credit card out and a source for new tweeters

 

[Lordoftherings]

^ All right man, that's all what I needed to hear.

By the way, I did some of these stupid things similar to that (test tones at 20khz blasting off to see if I can ear them, included), over three times.

So it cost me six tweeters at $200 a piece, which comes to $1,200 plus tax (about 14% at that time). Grand total of $1,368 cdn for a bunch of stupidities commited under my own supervision.

But now, I can give advice from my knowledge strongly acquired.

Was it worth it at the end? Well, let me put it this way, do I get paid for giving advice?

 

[3db]

Yes, that will do it for sure, no matter what

Or, place a test tone CD and go just a bit over your limits, say 17k and see if you can hear it at a higher level, like a JND test
Get the credit card out and a source for new tweeters

I almost fell for that...and just before I started to turn up the volume knob, common sense slapped me right in the face...before making that mistake.

 

[Tulsajj]

So is the same for all receivers and speakers? My receiver is a Pioneer 1018 powering PSB T55 Towers. So turning up past "0" could possibly damage my speakers or receiver? Most of the time I don't go past "-20" but that seems a little low, not much punch.

Is there any way to reset the reference point on my stereo, for example make "0" on the receiver the point where I turn to watch movies instead of "-30" ?

 

[Lordoftherings]

So is the same for all receivers and speakers? My receiver is a Pioneer 1018 powering PSB T55 Towers. So turning up past "0" could possibly damage my speakers or receiver? Most of the time I don't go past "-20" but that seems a little low, not much punch.

Is there any way to reset the reference point on my stereo, for example make "0" on the receiver the point where I turn to watch movies instead of "-30" ?

Hi,

We already discussed that point. Just for good safety, limit yourself turning the Master Volume level pass the 0db point.

It's the same with any receivers or amps. If your Pioneer receiver allow you to set a maximum volume level, just select 0db as a good reference point, if your Pioneer normal volume level goes up to +15db, for example.
This is just to play safe, no more no less. Just use common sense when turning up the Master Volume control knob.

I don't know about your particilar receiver on the settings for maximum volume in multichannel or stereo audio modes, just look in your manual.
The maximum volume for both modes should be close to similar.

Cheers,

bob

 

[Lordoftherings]

I here newer recievers are protected against this distortion know as "clipping
.

^ I spot this spammer on 8 different threads. And I reported them all.

Is that a good average?
In less that 22 seconds (all 8 of them!).

LOTR

 

[3db]

^ I spot this spammer on 8 different threads. And I reported them all.

Is that a good average?
In less that 22 seconds (all 8 of them!).

LOTR

As they say out east. You da homme lord tunderin geeziz !!

 

[Lordoftherings]

As they say out east. You da homme lord tunderin geeziz !!

Hey, thanks mate.

How's it going this morning 3db?

 

[3db]

Hey, thanks mate.

How's it going this morning 3db?

Its Monday. What can I say? Hope things are going well for you

 

[Lordoftherings]

Well, yes and no.

I'll explain. Yes because I'm good at what I'm doing.
No, because of just the opposite.

I'll explain further. Yes, because life is great no matter what (well, not to sick then).
No, because I'm tired to get bad rep for not knowing who the heck is playing me. I'll explain a bit further. You give me a Thanks for my above post just for courtesy and appreciation of friendship. I return you the favor. Great, what's wrong with that then? Nothing. It's great. Halleluja, praise the Lord of Goodness. Then what? Well, when someone give you a negatve instead of a positive, that's when you're in the dark, because you don't know where it's coming from. See, following my drift? But I know who you are when you give me a positive, it's right there with your name.

I thing you know what I'm saying. So that's why I don't feel so good, not because of the chicklets, but because you are put into darkness when there is a negative. So, how can you improve honestly and grow up in a mature and respectfully manner?

Agree?