difference from a sub clipping and bottoming

[audioatg 10+ year member]

Possesion of a controlled substance.
They do not use labs to analyse narcotics, thats only on tv, they use field test kits.

If it turns a certain color it's classified as a certain drug, it only has to have certain elements to be considered such.

Which then again leads to the duck theory.

But whatever, tired of arguing this, the outcome is all going to be the same whether it be true DC or a DC clone sent to your speakers, it's bad for the amplifier and speaker to continuously run in a full clipped scenario if there is any argument to the contrary then enjoy the magic white smoke from your equipment.

I know here in NJ, DE mabye PA not sure about maryland. But they do a Field test first then send it off to the lab for better checking. Field tests have been proven wrong many tims. Even seen a show on MTV called busted when they had a field test proven wrong when it was sent into the lab for better testing. Not sure what state they were in though.

 

[Mass Car Audio 10+ year member]

The only reason a clipped waveform is going to kill a amplifier is if you have the gain not set right and your bass boast on causing it to over heat from high rail voltage or low DC input voltage. Hes stating it is hard on the speakers with high output voltage with high frequency's. I did not read anywhere in your post him saying that a clipped waveform will hurt the amplifier. All he is saying is they have a protecting circuit that will not let the amplifier produce a clipped waveform above 16db but it will still produce a clipped waveform up to 16db.

Also the only reason they have that protection circuit from going over 16db of a clipped signal is because it will help from killing the speakers it is driving.

 

[subzero 5,000+ posts]

X2. A amplifier that is working correctly will not put dc current to the voice coils.

Because you now have added the sine wave...AKA as music, therefore direct curent is changed to an alternating curent. it now has a signal.

I think my subs are clipping . Shitty PA amp. I need moar POWER!!!!!.

 

[tinmanchris217 10+ year member]

Everyone is pointing out some very good things and I feel this is a rare occasion where, even though people are wording things a bit differently, most are in agreement.

This is a healthy thread guys, nice job.

Bwahaha... WAS a healthy thread. *flush*

The speaker's coil creates force based on the chang in current passing though it. In a healthy setup, the V_AC gives you a quantitative estimate of how strong that force is.

When the cone stops moving momentarily, the force on the coil is already pulling the cone back, as is the spider's mechanical force. DC isn't causing this.

DC on a coil will make it push out and stay out. Similar phenomenon, but not the same.

During a hard clip, or a square wave, the coil under goes a push-hold-pull-hold cycle... which can cause heat to build up and possibly leakage/ripple. It can also damage soft parts, because the push and pull happen faster than during normal sine wave operation.

That is the end of the similarities though, because it still cycles at a high rate (30-100 Hz). If it's extremely underpowered, you'd have to clip the living snot out of the amp to cause serious damage, from the above hard clip symptoms.

 

[jordan572 10+ year member]

well it sounded like my sub was bottoming out but i find it very hard to believe because i dont think my amp has enough power. It has happened a couple times about 2-4 months ago. if the sub still plays clean no matter what volume [except when it is bottoming or clipping or whatever] i take it nothing was wreaked.