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-   -   Bass Boost & Clipping (https://forum.realmofexcursion.com/amplifiers/28265-bass-boost-clipping.html)

galacticmonkey 06-08-2007 09:12 PM

Bass Boost & Clipping
 
http://www.icixsound.com/iv/view_vid...ype=&category=

Heres a good video explaining and showing exactly what clipping is, and how it works for those of you not in the know. Its a little hard to explain what happens to the signal in words, so heres a video showing you exactly what it looks like and how it comes about.




edeekeos 06-08-2007 09:15 PM

good post ftw

betterthanquakn 06-08-2007 09:17 PM

thats good info lol i can i dont kno much about car audio after watchin that i kill the bass boost lol ! now i got to really take time and notice my mistakes thanks for the video i didnt really know what clipping was until now.

s10dude 06-08-2007 09:30 PM

i don't use my bass boost...but i know not to now!..thank's for the info....

cdowns13 06-08-2007 09:30 PM

ummm what was that he was using??? i would like one of those just to see..

galacticmonkey 06-08-2007 09:48 PM

http://en.wikipedia.org/wiki/Oscilloscope

Yep. Just be careful with the gains also, as those being too high can cause the same thing.

Should I sticky it?




mjf595 06-08-2007 10:00 PM

yes sticky.

galacticmonkey 06-08-2007 10:04 PM

Done. Lets hope people read it!




1400wGTP 06-19-2007 10:19 PM

very informative, even though i already knew what it looked like...lol, but hey im sure it will help alot of people know about how they are pushing their drivers not necessarily to their limits but overdriving them with a constant signal.

ben_cline 06-19-2007 11:10 PM

Done that in class before, though not with subwoofers. Just building class a, b, and c amplifiers.

For a visual explanation, it's like taking a trampoline, and raising a board to the bottom. So instead of a parabolic wave, you get a square wave.

Mitheral 07-07-2007 06:50 PM

Thanks for the video tut. Now what to do with all the BBE settings on my Alpine 9856 lol. Na just kidding I usually run with the defeat on snd sometimes run with it off and the BBE set to off. I makes the bass to loose for me anyways.

BaSSMasTa 07-08-2007 11:11 AM

good searching skills, nice video!

germandark 07-08-2007 08:14 PM

what about checking for clipping with a dmm, how is that done?

92K1500 08-08-2007 06:47 PM

So would setting your gains and everything with an O-Scope be better than using a DMM? Because I can get access to an O-Scope at tech.
And using that, would you still use a 60Hz note like you would with a DMM?

Southpole1989 08-08-2007 06:53 PM

an o scope is the best way (since to can see the wave it self) to set the gains and it also lets you take advantage of if your amp is underrated and did not come with a birth sheet or if you can't get it bench tested but a dmm can work but using the dmm requires that the numbers be excatly what they are suppose to be.

92K1500 08-08-2007 06:57 PM

Ok, thats what I thought.
But would you just hook it up playing music, or a specific note, or what?

Southpole1989 08-08-2007 07:04 PM

usally people use 60 hz or 50 in other country's since that is the standred for electricty in your house and your dmm is most likely to give out the most accurate reading.

92K1500 08-08-2007 07:12 PM

Quote:

Originally Posted by Southpole1989 (Post 397616)
usally people use 60 hz or 50 in other country's since that is the standred for electricty in your house and your dmm is most likely to give out the most accurate reading.

I was talking about the O-Scope.

kensaudio99 10-23-2007 10:16 AM

Clipping sound very awful and some peoples do clip their subwoofer because they probably do care about the sub-woofer and blew it up.

loudaccent 10-24-2007 06:55 PM

bass knob
 
is it the same as useing a bass knob becuse i dont always want a lot of bass with high voloum, but if i wanna blow some one away then i use the knob is that the same thing?

ZtC 10-24-2007 06:59 PM

Quote:

Originally Posted by ben_cline (Post 358256)
Done that in class before, though not with subwoofers. Just building class a, b, and c amplifiers.

For a visual explanation, it's like taking a trampoline, and raising a board to the bottom. So instead of a parabolic wave, you get a square wave.

what class

Mr. J-Rock 10-24-2007 07:02 PM

Quote:

Originally Posted by germandark (Post 371778)
what about checking for clipping with a dmm, how is that done?

x2 i would also like to no

jparkdzg 11-08-2007 09:35 PM

I don't think playing a specific tone matters. So long as it is a low frequency sub tone.
An Oscilloscope is ALWAYS better. They measure actual, real-time values. DMMs only measure RMS values. That is why when you set gains with a dmm, it takes a second before it outputs a reading, because it is taking the RMS value.

Cap'n'Crunch 11-08-2007 09:57 PM

Quote:

Originally Posted by germandark (Post 371778)
what about checking for clipping with a dmm, how is that done?

you dont :(

jparkdzg 11-08-2007 10:26 PM

Quote:

Originally Posted by Cap'n'Crunch (Post 472979)
you dont :(

Actually, it is possible, but is highly inaccurate. Set your gain to one position, and then set your head unit a position. Then take your voltage reading. Then raise or lower the volume of the head unit by a fixed amount, say, 3 clicks or whatever. Then take the voltage again. You now have a ratio. Every 3 clicks, my voltage goes up __%. So keep doing this until the % increases is different. Your reading on the dmm will be a lot higher than it should be, because dmm measures RMS values. The RMS value of a clipped signal is much higher than of a clean signal. This is laborious and time consuming, so the easiest thing to do is set the gain, at the most, to the manufacturer's given RMS output wattage. Or if you want to be safe, a little lower.


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