Headphone jack to external speakers - static noise?

I don't think the problem is with the cables (male/male extension jack) as I don't get any static noise if I connect from the speakers to my mp3 player; however, if I connect the laptop headphone output to my speakers, I get a really bad static noise. It seems like something on the laptop is interfering? I've directly connected a portable speakers directly to my laptop and I don't get any static problems so I don't think there's a problem with the sound card either. Anyone have any clues?

 

I have the logitech x-230 speakers hooked up to a 6500t... they work great... I was surprised at how loud and good they sounded considering my last laptop could push nothing through them. I'd say the laptop plays those speakers just as well as my desktop.

What kind of notebook do you have? That might help. Have you tested the speakers in another system?

 

I have dv2500t. And the speaker is a Logitech Z-5500 and its control box has an input jack, so that's where I can connect mp3 players and etc. I don't have a problem with the mp3 player but if I connect my laptop to the speakers, I get a lot of static noise. I've connected the laptop to portable speakers and it sounds fine. The Z-5500 seems to pickup unnecessary frequency or something, I'm not really sure...

 

Did you ever find a fix for this as I have the same problem. AND, if I listen close to the computer it makes the same noise as the interference even with the speakers off.

 

No I don't think it's interference from an external source.. I've even run it through a power conditioner and it always does it. And, it does it when the wireless is turned off.

I think it may have something to do with the hard drive. Whenever get the drive to run like when launching a program it ceases briefly. And, it's not a new issue. It's always done it but now poses a problem as I want to use the computer to record and although I'm going to go through the USB port and not use the speaker port I'm not sure if it'll still tranfer the noise to the recordings.

 

Unplug your AC adapter and see if that fixes the issue. There's some issues with the MB being powered by the AC adapter and interference coming out through the headphone jacks. So I've heard.

 

Exactly...that's the issue. It goes away when the AC adapter is not plugged into it, but then you're running off battery power and that won't last all afternoon if you want music at a party. It just doesn't make sense and seems as if something isn't working as it should. So, the question is how do you make it go away when it's plugged in? I'm stumped AND I'm hoping that if I get an interface that connects to the USB and I'm using that it won't have the same interference.

 

Very old problem finally solved just last month.

I had to use a pure sine wave iverter to get rid of the noise. Using a big honkin 19V aux battery unit worked as well.

Tried several power bricks, and several HP laptops (DV9500T's, and ZD7000's) and the AC adapter was the problem every time.

Tried twisting the wires on the bricks as well, with no luck. Tried several outlets, and UPS units (again with no luck).

Perhaps a line conditioner would work.

Joe

 

- I've tried a power conditioner and it makes no difference and I don't think it's directly related to the AC adapter because the noise is present on the machine all the time (although it's very faint it's always there plugged in or not). It's just that when it is plugged in the noise transfers to the headphone jack and the SPDIF jack. But, when you put your head up to the computer you can still hear the noise (which is a high pitched squeal) whether plugged in or not. When I put just headphones into it I don't hear it because it's so faint, but when it goes to a powered speaker it's amplified.

When I run a larger program that might take 5-10 seconds to boot up during that time that the drive is running the noise stops. AND, when I push the button to switch to an external monitor when the monitor blinks it also stops for that brief second.

I'd like to think it's either the hard drive emanating the noise or the monitor, but I've tried hooking the machine to an external monitor and I've been unsuccessful trying to get the monitor on the laptop to go off.

Thanks for the input thus far....

 

....ok I got it hooked up to an external monitor and it wasn't that. I think it's the drive...or maybe a fan on the drive perhaps?

 

I have been getting what seems to be unfiltered computer noise through my headphone jack when using the external AC power source with 3 prongs. The computer is a laptop Compaq Presario V5000 and I have been using an external amp to drive speakers from the headphone jack.

Finally I tried connecting the power supply for the laptop to a 'separate' wall socket – not the same as the one powering the amp and all the static noise disappeared.

 

I have been getting what seems to be unfiltered computer noise through my headphone jack when using the external AC power source with 3 prongs. The computer is a laptop Compaq Presario V5000 and I have been using an external amp to drive speakers from the headphone jack.

Finally I tried connecting the power supply for the laptop to a 'separate' wall socket ie. not the same as the one powering the amp and all the static noise disappeared.

 

I have been getting what seems to be unfiltered computer noise through my headphone jack when using the external AC power source with 3 prongs. The computer is a laptop Compaq Presario V5000 and I have been using an external amp to drive speakers from the headphone jack.

Finally I tried connecting the power supply for the laptop to a 'separate' wall socket – not the same as the one powering the amp and all the static noise disappeared.

 

I have been getting what seems to be unfiltered computer noise through my headphone jack when using the external AC power source with 3 prongs. The computer is a laptop Compaq Presario V5000 and I have been using an external amp to drive speakers from the headphone jack.

Finally I tried connecting the power supply for the laptop to a 'separate' wall socket – not the same as the one powering the amp and all the static noise disappeared.