Bass Boost & Clipping - Realm of Excursion



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Old 06-08-2007   #1 (permalink)
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Default 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.



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Old 06-08-2007   #2 (permalink)
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good post ftw
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Old 06-08-2007   #3 (permalink)
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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.
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Old 06-08-2007   #4 (permalink)
 
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i don't use my bass boost...but i know not to now!..thank's for the info....
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Old 06-08-2007   #5 (permalink)
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ummm what was that he was using??? i would like one of those just to see..
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Old 06-08-2007   #6 (permalink)
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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?



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Old 06-08-2007   #7 (permalink)
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yes sticky.
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Old 06-08-2007   #8 (permalink)
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Done. Lets hope people read it!



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Old 06-19-2007   #9 (permalink)
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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.
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Old 06-19-2007   #10 (permalink)
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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.
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Old 07-07-2007   #11 (permalink)
 
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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.
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Old 07-08-2007   #12 (permalink)
 
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good searching skills, nice video!
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Old 07-08-2007   #13 (permalink)
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what about checking for clipping with a dmm, how is that done?
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Old 08-08-2007   #14 (permalink)
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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?
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Old 08-08-2007   #15 (permalink)
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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.
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Old 08-08-2007   #16 (permalink)
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Ok, thats what I thought.
But would you just hook it up playing music, or a specific note, or what?
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holy cow. FS 20 BEFORE break-in..... This thing is going to feel like an earthquake on the lows.
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Old 08-08-2007   #17 (permalink)
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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.
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Old 08-08-2007   #18 (permalink)
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Quote:
Originally Posted by Southpole1989 View Post
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.
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holy cow. FS 20 BEFORE break-in..... This thing is going to feel like an earthquake on the lows.
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Old 10-23-2007   #19 (permalink)
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Clipping sound very awful and some peoples do clip their subwoofer because they probably do care about the sub-woofer and blew it up.
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Old 10-24-2007   #20 (permalink)
 
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Default 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?
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Old 10-24-2007   #21 (permalink)
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Quote:
Originally Posted by ben_cline View Post
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
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Old 10-24-2007   #22 (permalink)
 
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Quote:
Originally Posted by germandark View Post
what about checking for clipping with a dmm, how is that done?
x2 i would also like to no
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Old 11-08-2007   #23 (permalink)
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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.
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Quote:
Originally Posted by germandark View Post
what about checking for clipping with a dmm, how is that done?
you dont
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Quote:
Originally Posted by Cap'n'Crunch View Post
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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