thesalo

its not 300 watt rms its 600 watt and i bridged it to give 300 watts to the sub

jalat

iTrader: (6)

uhhh, the amp is going into protect.

so something is not set right with gains.

user error.

whosit

iTrader: (2)

Power per channel @ 4 ohms: 4 x 120w Max / 4 x 60w RMS
Power Bridged: 2 x 300w Max / 2 x 150w RMS
Power per Channel @ 2 ohms: 4 x 150w Max / 4 x 75w RMS

These are the ratings for that amp. 200 nominal means 200RMS. So you had 150 watts rms to the sub so that should not have blown it but distortion will. I am guessing it a gain/boost issue.

MR2NR

iTrader: (66)

^^^^ distortion will not kill a sub. Heat kills subs in all cases. You can run a fully clipped signal into a sub all day long and not kill it as long as the subs thermal barrier is not broken. As long as the sub can dissipate the heat, it is good to go.

For the OP, your amp no matter which way you slice it is going to produce a maximum RMS rating of 150 watts. This is the real power that you amplifier produces. Ignore all the other claims of power. My bet is also that you had the boost cranked up on it and the gain turned wide open thus causing the signal going to the sub to be wildly distorted. The sub will hang on for as long as it can, it does not care if you send it music or distortion, it will play what it is given for as long as it can before the buildup of heat melts the inner workings of the sub, called the voice coils.

whosit

iTrader: (2)

I think that maybe you are misunderstanding the difference between RMS and Max. It is 600 watts maximum. That means thats the maximum that amp will do. When selecting a sub and amp its the RMS rating you need to worry about.

whosit

iTrader: (2)

Rob, am I wrong that a distorted signal will heat up a coil quicker? I always thought this to be the case will all electrical signals not just audio.

MR2NR

iTrader: (66)

It definitely will heat a coil up quicker, you are correct there. For the purposes of this poster's issues though, it is all about the subs thermal barrier. If the sub can dissipate the heat in the voicecoils, no signal, be it clipped or clean is going to melt them. Heat is a natural byproduct of the production of power, no way around it. One of the worst things that people do in their systems is to run the sub(s) long and loud and not allow them to cool down. A sub needs cool down time, never run them at a sustained high level output or expect problems.

whosit

iTrader: (2)

OK... I see where you were going now. Thats what I figured to is a gain and boost issue.

Natban

Toddyboy, I'm an electrician by trade. I have cans of magic smoke for sale and can install them for a special price!! I also have a bridge to sell you. LOL.

thesalo

your right my boost is as high as it can go, but if i get another sub and run it to the same amp will i have more problems?, and also do i have to play it quiet for the first few weeks because the sub is new?