When I plug my laptop into it, and then play music through my laptop I get really bad cyclical sound ... is there a way to filter this out?

asked on February 26, 2014

Showing 1-10 of 10 answers

Your headphones are (probably) picking up the electomagnetism put off by the inverter. Move away from the inverter and see if it goes away. If not, then insulate your headphone wire. If that doesn't work, then try it with someone else's (preferably new) laptop. Some cheap/old laptops are built with too few capacitors and you probably shouldn't use this inverter. (Alternatively, you could hardwire capacitance into your charging cord).

It's also possible that the product is not actually putting out a proper waveform. It works fine on my laptop, so I haven't tested that yet.

Xander P.
· December 9, 2019
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I do not think so. Be careful with inverters of this type. They are called "modified sine wave inverters"
And what you really need is termed a "True Sine Wave Inverter." A modified sine wave inverter delivers a digital wave form that over time will destroy your laptop. It also is very probable that it is what is causin… see more
I do not think so. Be careful with inverters of this type. They are called "modified sine wave inverters"
And what you really need is termed a "True Sine Wave Inverter." A modified sine wave inverter delivers a digital wave form that over time will destroy your laptop. It also is very probable that it is what is causing your problems. A "True Sine Wave Inverter" produces a real waveform and also switches at 60HZ. It gives the same purity of,power as your electric company does. However these are more expensive then the modified sine wave models are. Most of those come with warnings not to use any devices that need chargers.. Examples of true sine wave inverters are made by Samlex, Xantrex, ( my two favorite producers ) and a few other companies. see less
I do not think so. Be careful with inverters of this type. They are called "modified sine wave inverters"
And what you really need is termed a "True Sine Wave Inverter." A modified sine wave inverter delivers a digital wave form that over time will destroy your laptop. It also is very probable that it is what is causing your problems. A "True Sine Wave Inverter" produces a real waveform and also switches at 60HZ. It gives the same purity of,power as your electric company does. However these are more expensive then the modified sine wave models are. Most of those come with warnings not to use any devices that need chargers.. Examples of true sine wave inverters are made by Samlex, Xantrex, ( my two favorite producers ) and a few other companies.

C. Cornell
· February 27, 2014
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Is your notebook battery at the stage that your computer has to be plugged in to use it? If so you might be basically running straight of AC to DC and this inverter is typically budget sine wave quality. Instead of buying those other items listed, consider a new notebook battery (if yours doesn't hold a charge. )
ART005
· January 31, 2018
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Bet ya $10 it's ground noise. Buy a $1 ground isolator and see if it fixes the problem.
Reference source: I'm an Audio Engineer and deal with bad ground all the time

Trent C Watson
· June 25, 2019
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While it is true that a modified sine wave inverter may damage certain types of electronic devices, that's really more of the exception than the rule. There are two different things that you need to be concerned about: appliances that use AC motors and certain classes of delicate medical equipment. If your electronics don't fall into either of those categories, then you're good to go with a modified sine wave inverter - and you saved a bunch of money to boot. reference to above information. http://cartech.about.com/od/Power/f/Will-A-Modified-Sine-Wave-Inverter-Damage-My-Electronics.htm
Krober
· February 16, 2015
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Since you have 12VDC already, you can get a car adapter for your laptop, instead of using the inverter to plug it into.
Starchild
· February 9, 2018
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Use a Isobar/Tripp-Lite UltraBlok428 and not only will all be well, your laptop will like the power produced better.
John Cleary III
· March 15, 2015
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I agree with the last answer, since laptop power supplies turn the power back to dc the modified sine power doesnt usually affect it.
My microwave doesnt like it tho and takes 3x as long to cook.

John A. Lucier
· February 22, 2017
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Consider using a ground loop noise isolator.
http://www.amazon.com/PAC-SNI-1-3-5-3-5-mm-Isolator/dp/B001EAQTRI/ref=pd_sim_sbs_e_1?ie=UTF8&refRID=14ZMJM58AAMC3JSFSVHX#productDetails

c e easterly
· October 15, 2014
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Do not use a TrippLite surge suppressor on an inverter that outputs modified sin wave. These surge supressors are intended for pure sin wave output. It can cause damage to the suppressor/and or the inverter.
Andrew
· June 30, 2017
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