i just bought two visonik 10's in a box that pushes 300 watts in each sub so 600 total. anyways, it came with a visonik box and everything, all i need is a sub, i just need help on which one to buy, and should i get a new deck? or keep the stock hu? and get a converter? oh yea, these speakers were only 84 bucks with subs and box brand new

 

I am confused. You just said that you bought two visonik 10's aren't those subs? Do you mean that you need an amp?

BTW subs do not push watts into anything...

Bryan

 

If you are looking for an amp, get one with plenty of power. It would be a lot better to have extra headroom than to overdrive an amp and screw up a woofer. Make sure it is a good brand too. I would also reccomend a headunit with a level adjustment for the sub output so you can turn it down if need be.

 

Careful what you recommend. Overpowering a low quality subwoofer will do more harm than underpowering it...

Bryan

 

What is the model number of those subwoofers? Just need to know since Visonik has many different subs with different voice coil configs and power handling...

Bryan

 

What are you talking about? It is a lot easier to damage a sub from trying to push a low power amp past its potential.

 

http://www.geocities.com/decriminali.../clipping.html

Bryan

 

I never said anything about underpowering, I said it would be better to have more headroom. If you push an amp too hard you get something resembling a square wave which moving coil drivers do not reproduce well especially at high levels. If you have ever heard a square wave you would know that they do not sound good. The chance of damaging a woofer from too much power is very rare. How often do you see a cone fly off a woofer or a coil shoot away from the magnet? I seriously doubt that he was planning on buying an amp with so much power that it would damage his woofers. So what I am wondering is why would you recommend a lower powered amp? You can always turn down the gain.

 

Well actually I usually do subscribe to the more headroom is better. It just seemed to me, from your original post, that you were saying something along the lines of "don't underpower" your sub or it will cause damage. The part that I think you understood me was about overpowering your subs was this: I just don't think that the subs in question can actually handle what he is saying they can. Let's face it, not many low grade speakers can.

I have heard a square sine wave, which up until you just explained yourself, I didn't think was part of the situation here.

I now think that understand what you are saying. Extra headroom is better than not enough power. I agree with this, but it is not what I thought you were saying at the beginning of this discussion.

I still stand by the fact that he does not need to spend too much on his amp. I am pretty sure that those subs will not handle as much power as they say. Why waste the money if you aren't going to put the amp to use anyway? Unless of course you are planning for future upgrades...

Anyway, sorry for misunderstanding the situation.

Bryan

 

I almost forgot, I don't know where that article is from, but you can tell that guy a distorted signal from an amp can cause thermal damage.

 

It's cool, if you can't tell I like to argue.

 

Hey I like people like you. I learn best from being told I am wrong

Bryan

 

It's written by Mark Zarella. He is a physics major and a well known person in the car audio community. You should ask him about that. He likes to argue too

You can reach him here:

markzarella@attbi.com

Let me know how it goes!

Bryan

 

Have any proof? I haven't heard distord signal from an amp could cause thermal damge to a sub so I'm interested in reading the reasoning

 

I believe I read it in the Yamaha Sound Reinforcement Handbook.

 

WoodsDaddy:
I believe I agree with you both on some points here...but autophile1 wins out. You are very right that if you take an amp and overdrive it to clipping with an extremely high amplitude...you will indeed produce a quasi square wave...but you're talking about some serious overdrive. Think about trying to make a sine wave a square wave by lopping the top and bottom off. There's still going to be a good sized slope until you get about 80x over nominal amplitude...and you won't be able to drive any brand car audio amp I know of that high, because you'd have to drive it into such a low impedance that the amp would overheat practically instantaneously...not to mention needing an enormous power supply.

Aside from that though...I agree with you that it's important to have an amp with the proper amount of power that will let you fully drive the speaker at no more than 75-80% of its gain up.

Bryan I also agree with you that having an overpowered amp that's not properly tuned is the easiest way to blow a speaker.

However WoodsDaddy I don't agree with you that having an underpowered amp running at full is any huge danger for subs, or that it's more dangerous than an overpowered amp. As yoda would say, a lot of distortion it would cause yes, blown subwoofers it would not.

Austin519

 

That is a good point, I don't deal with car audio much. I mostly just stick with pro audio gear for live productions and such.

As far as the article I think we were really saying the same thing in a different way.

"an amplifier capable of delivering a certain amount of power can produce even more power when driven into clipping. So your 100 watt amp may actually be delivering much more than that if you're not careful."

He is saying that it will cause a problem because of overpowering as a result of a distorting amp.

I just said that distorion could cause a thermal problem, really the same thing he is just saying it is from too much power which is the actual reason, it is just caused be the clipping of the amp.

I hope this makes sense it is kind of hard to explain.

 

WoodsDaddy:
Then we are all in agreement

Austin519

 

There is always a first for everything eh Austin

Bryan

 

autophile1:
I must have been drunk Never!!

Austin519