dude u know what im getting at here. u can be try to be an azz all u want. the fact still remains that any of those things or combination could cause that sub to blow up the way it did. clean and careful overpowering would not do THAT to a sub and u know it.

 

i never said THD blew it up. however THD should be taken into account when u talk about clipping and distortion.

 

OK Tinted you are way off, THD has ABSOLUTLY nothing to do with this discussion (Slow/n\low), I could go deeper on this but nobody likes my long winded electrical explanations. Slow/n\low is generally correct on technical issues.

The clipping isn’t what damages the speaker it is the heat buildup from the clipping. A 25 watt amp clipping isn’t going to do jack to the woofers in question BUT to agree with Yuli clipping essentially raises the average power going to a driver so clipping a moderate power amp effectively raises the RMS (Furley). Bottom line Yuli, you get away with overpowering (like I have) by not clipping (I keep the volume down though). You ‘probably’ only use all the power you have when you burp thus limiting the heat build up. If you were to bang all day with the big amp you might toast a coil (if you weren’t using DD they never burn) or get into an over excursion situation. Frankly it looks like over excursion locked up the coil and he didn’t turn it down.

Tinted’s initial answer of “wrong crossover point” seemed silly, but if you limit the freq the woofer sees you limit the power it sees as well. In other words by hitting the woofer low, at his chosen frequency, he essentially puts butt tons of power into the woofer but at a lower average RMS value. So his answer was actually a great trick to get loud day to day and at competitions

[ July 29, 2004, 04:42 PM: Message edited by: JohnVroom ]

 

BTW clipping is not a harmonic distortion it is a departrure from harmonic distortion
agreed

[ July 29, 2004, 04:15 PM: Message edited by: JohnVroom ]

 

True to a point. But THD increasing is a biproduct of clipping.

 

So did this guy get his sub replaced under warranty ?

 

If anything 0.8% THD+N or more blows subs, anyone who owns this amp is ****ed ...

http://www.soundsolutionsaudio.com/f...1090981063.jpg

Anyways, did the sub get replaced under warranty ?

[ July 29, 2004, 04:46 PM: Message edited by: Jmac ]

 

Clipping and harmonic distortion are 2 very different kinds of distortion. This is basic Transistor knowledge.

I think we are all arguing for no reason. WHO knows what happened to it. Maybe he over powered it with or without clipping or harmonic distortion. It blew....then maybe he kicked it! Don't waste all your time on something that happened and you have no idea how it happened.

I thank the ones that agreed on my point fo view with the MTX video clip. I actually like that MTX woofer and would definitely choose it over the L7, and maybe over the W7. But you have to question things like this. They were very quick to show how much voltage was going through the sub(Voice coil) yet they don't seem to mention how they wired the coils and what the amperage reading was. You only need BASIC ohm law knowledge to know how to calculate Power (watts). The MTX COULD have been handling more power then the others, but COULD have as easily been getting half the power then the others.

Tinted, you are right to a certain point...others, you are also...so lets just sit back and open a beer.

And please....we don't need stupid childish posts.

[ July 29, 2004, 04:51 PM: Message edited by: dbEric ]

 

say this guy was running his amp with a signal that had 25% duty cycle....

At 10% THD (very audible) you are looking at 126.5 average RMS watts compaired to 116 average RMS watts at 1% THD (not audible) on the amp in question...

I doubt the extra 10.5watts would be responsible for that kind of damage....

I'll say it again... clipping is rarely the root cause of woofer failure.... [img]graemlins/thumb.gif[/img]

[ July 29, 2004, 05:21 PM: Message edited by: Haunz ]