Does it produce a true or modified sine wave?
154418
I use it to recharge Directv meter, power tools, drill, impact wrench, etc, don't know about the wave
2249398
As another said, it's because the inverter puts out a "Modified sine wave" where it's power isn't exactly the same as house power. If you have an electrical workers oscilloscope, you'd see the house power curve up to the max and drop down in a curve, any power inverters that aren't labeled "True sine wave" just put out pulses of power with it instantly jumping to max, staying on max for a few milliseconds, then turning off (with no curves). I don't know fully why the "buzzing" comes thru, but it is the inverters power (and I've seen that explained in power inverter manuals). As another said, it's because the inverter puts out a "Modified sine wave" where it's power isn't exactly the same as house power. If you have an electrical workers oscilloscope, you'd see the house power curve up to the max and drop down in a curve, any power inverters that aren't labeled "True sine wave" just put out pulses of power with it instantly jumping to max, staying on max for a few milliseconds, then turning off (with no curves). I don't know fully why the "buzzing" comes thru, but it is the inverters power (and I've seen that explained in power... » Read More As another said, it's because the inverter puts out a "Modified sine wave" where it's power isn't exactly the same as house power. If you have an electrical workers oscilloscope, you'd see the house power curve up to the max and drop down in a curve, any power inverters that aren't labeled "True sine wave" just put out pulses of power with it instantly jumping to max, staying on max for a few milliseconds, then turning off (with no curves). I don't know fully why the "buzzing" comes thru, but it is the inverters power (and I've seen that explained in power inverter manuals). « Show Less
1299810
It is my understanding that it is NOT a pure sine wave. I do run a HDTV and Blu Ray player with it and have had no issues
1717891
I am a retired electrical engineer so I can tell you it is not necessary to scope the output of this inverter to tell you the output looks like crap as compared to a pure sign wave inverter. It is a modified square wave output that simulates a sign wave as close as possible. The only advantage of this inverter is it is cheap and has the ability to start inductive loads rather well because it can supply the necessary current needed to achieve motor starting. I use this inverter to run saws, drills, and a small air unit in my shop. I have to pure sign wave inverters that run my home because many electronic appliances require a pure sign wave. You can look up modified sign wave on the internet to see the difference in a modified sign wave and a pure sign wave. Hope this helps in your decision making.
501708
No its a modified sine wave. Do not purchase this inverter it has a 50 cycle 120v output. It will not work for many North American rated devices. The stated specifications are incorrect.
998647
Peetty sure it is modified. Dont know ecatly what true sine is. Goes to the manifactures web page. They explain
2102054
modified sine wave.....i use mine to run the washer and dryer , it works fine for that
206404
Yes. However, it is not called distortion. It has gain options, and has a sound effect built in called "numetal gain". It is pretty much a distortion setting. There are also some premise channels made for dostortion.
1822809
Answer from Wikipedia: A power inverter device which produces a smooth sinusoidal AC waveform is referred to as a sine wave inverter. To more clearly distinguish from "modified sine wave" or other creative terminology, the phrase pure sine wave inverter is sometimes used. The terminology "modified sine wave" has come into use and refers to an output waveform that is a useful rough approximation of a sine wave for power translation purposes.
1572384
Yes. It has a specific cycle pattern it goes through but the change from one pattern to the next does respond to sound. I havent noticed if its more or less responsive to low end or highs.
692857
Yes it's a pure sine wave inverter. It has a total harmonic distortion of less than 3%. I do not see a way to upload a picture. If you would like one, you can request it by email at info@powerbright.com
1442686
It just amplifies what goes into it, the frequency response is pretty flat unless you change the EQ switch, and even then it's only a very slight increase in the 20-40 Hz range.
1286416
It's a pure sine wave output, so there's no difference in the output. the second back up wouldn't know the difference.
1136316
I purchase this unit after lots of research & I found out that for the price, it's the closest to pure sine wave I could find. This is my opinion on the product.
1286419
I have actually tested this but not with UPS's that have Pure sine wave. When I tested this with cheaper ups's it resulted in damage to the second inline ups. Also both batteries drain at the same rate so does not give you double the time left. There are ups's that are actually made to be run in series but those are expensive as we use them in our office at work. Those are made different then these.
12399
This unit has excellent frequency stability and as far as generated harmonics are concerned I did not detect any of any measurability. It has an rf frequency chip from Japan that has rave reviews. So you shouldn't have to worry about it.It produces very high fidelity stereo sound and I would recommend it to anyone who'd buy it. I hope this is helpful to you. Regards, Greg
2186265
Says it is full sine but I couldn't tell because as soon as I tried it, it quit working before it even started.