Laptop Speakers blowing

[Wagstar]

I have used 4 different sets of laptop speakers out of my Yamaha QY100 (Music Creating device) The speaker jack goes into the "Phones/Line Out" socket on the qy100 they work for about a minute then the green light goes out on the speakers and they stop working, no pop,bang or crackle, they just stop. The speakers have all been 5watts a side 10 watts total. I have it rigged through a Solar Panel system via a regulator; leisure battery, 1000w Pure Sine Wave inverter and a Surge Protect extension lead. Anyone know what i can do to stop this happening again please (apart from not buying anymore speakers!) Thank you.

 

[Cristi72]

Hello,

What kind of laptop speakers have you used? Maybe they cannot handle the output signal from synth or the distortion level is abnormally high (some GAIN control to the max).

 

[makkem]

Hi
The speakers should be ok with a line level output from the Yamaha.
It could be that there is a fault with the Yamaha,if you can get hold of a cheap multimeter then you should measure the voltage at the line output,could be there is a high voltage that is blowing the speakers amp or power supply.

 

[Wagstar]

Hi, Thank you to you both for replying, to add a twist to this, out of desperation I plugged in some 1 watt speakers that are powered purely from the "Phones/Line Out" and they work! I used them for about 2hrs this morning (Couldn't hear much from them though) but they worked! All the other laptop speakers needed a mains plug to power them. Does this now mean it could be a mains power issue, as it's coming through a solar power, inverter system? Thanks again, any advice is very much appreciated.

 

[makkem]

If the new speakers are not powered then they would be capable of taking a higher voltage than powered speakers.
I wouldn't of thought it was a mains power issue but it could be that the inverter is outputting a higher than normal voltage even though it is unlikely,another reason to get a multimeter to see.

 

[Wagstar]

Hi Makkem, Thank you for your advice I'll go and get one tomorrow and give it try.