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Old 03-09-2010   #1
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Default Misconceptions in car audio

As discussed in another thread, I would like to know what some of the common misconceptions are in car audio. I'll start with my biggest pet peeve...

Damping factor on an amplifier DOES NOT equate to better cone control, tighter bass, or better sound quality (Ess que) contrary to what many have heard. Also, the higher the number doesn't always necessarily mean the "better" an amplifier is, especially in the 12 volt world. Damping factor in the car audio world was a spec contrived by someone's marketing department and continued on through the decades with the bigger number meaning the better the amp.

I am trying to find the clinical trials that blew this myth, and I am having a hard time locating it. Regardless, if the damping factor is greater than 50, chances are one will NEVER hear the difference.

ETA: I forgot the biggest boo boo. In the past, some of the amplifiers with the highest damping factors used to cheat. They rated them at the circuit board instead of the speaker leads or terminals just so they could post a bigger number.

I have more misconceptions, but I want the collective to chime in on things such as slew rate, stiffening capacitors, THD, etc.

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Old 03-09-2010   #2
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Default Re: Misconceptions in car audio

Can't recall where I heard that, but it seems to me that where amplifier dampening factors are concerned anything over 50 is supposed to be adequate and higher slew rates are favorable.

I choose an amp based on power output, physical size and cost. Beyond that, I rely on reviews of real world experience to judge performance potential until I can hear it for myself. The rest of the specs have come to mean virtually nothing to me over the years.
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Old 03-09-2010   #3
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Default Re: Misconceptions in car audio

My favorite. 15" subs are sloppy. 8" are tight.

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Old 03-09-2010   #4
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Default Re: Misconceptions in car audio

Sealed enclosures for SQ.

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Old 03-09-2010   #5
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Default Re: Misconceptions in car audio

http://www.diymobileaudio.com/forum/...dio-myths.html

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Old 03-09-2010   #6
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Default Re: Misconceptions in car audio

You can't run your power wire next to your RCA's or speaker wire.
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Old 03-09-2010   #7
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Default Re: Misconceptions in car audio

Thank you. I knew such a thread existed, but, I kept searching for the keyword misconception. My search fu is weak today.

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Old 03-09-2010   #8
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Default Re: Misconceptions in car audio

benefits of Big 3 wiring upgrade
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Old 03-09-2010   #9
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Default Re: Misconceptions in car audio

Quote:
Originally Posted by ChrisB View Post
My search fu is weak today.
Search Fu is not what you need, you need mojo.

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Old 03-09-2010   #10
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Default Re: Misconceptions in car audio

Quote:
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benefits of Big 3 wiring upgrade
Especially on a stock battery and alternator.

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Old 03-09-2010   #11
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Default Re: Misconceptions in car audio

Quote:
Originally Posted by Chaos View Post
benefits of Big 3 wiring upgrade
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Originally Posted by ChrisB View Post
Especially on a stock battery and alternator.
ahhh... but which stock alternator, and what is the guage wiring used in said vehicle for ground and hot?

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Old 03-09-2010   #12
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Default Re: Misconceptions in car audio

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ahhh... but which stock alternator, and what is the guage wiring used in said vehicle for ground and hot?
Civics like most of the ricers drive with their 60 to 90 amp alternators.

It is going to take a lot more than the Big 3 to help them out!

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Old 03-09-2010   #13
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Default Re: Misconceptions in car audio

Brand X amplifier is underrated by 50% or more!

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Old 03-09-2010   #14
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Default Re: Misconceptions in car audio

Zed has a lot to say about these topics:
Zed Audio Corporation

But what he says might surprise you.

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Old 03-09-2010   #15
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Default Re: Misconceptions in car audio

--Car audio shops are filled with talentless morons that provide no real service to anyone.

--If you bought an expensive brand name audio product, you absolutely overpaid, and therefore you must be a idiot.

--The only good car audio brands are those that fly under the radar...

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Old 03-09-2010   #16
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Default Re: Misconceptions in car audio

A $1000 wire/cable sounds better than $1 wire/cable.
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Old 03-09-2010   #17
 
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Default Re: Misconceptions in car audio

Sub bass in a car is localize-able over 80 Hz.

I read that here and it seems to make sense to me...

http://www.diymobileaudio.com/forum/...-up-front.html

Last edited by remeolb; 03-09-2010 at 10:38 AM.. Reason: add link
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Old 03-09-2010   #18
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Default Re: Misconceptions in car audio

Quote:
Originally Posted by WRX/Z28 View Post
Brand X amplifier is underrated by 50% or more!
How about a certain brand that advertises 50x4 OR 325x2 all on 25 amps of fusing. 200 watts RMS I can almost believe with that fuse level but there is NO WAY I believe 650 watts RMS on 25 amps of fusing.

If you can find one of those amps, they still go for $700 to $750 which I find even more shocking...

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Old 03-09-2010   #19
 
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Default Re: Misconceptions in car audio

Is it possible for us to make this thread one with a stated myth and then proof to back it up? That way it's possible to weed out the people who think something.
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Old 03-09-2010   #20
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Default Re: Misconceptions in car audio

Quote:
Originally Posted by remeolb View Post
Is it possible for us to make this thread one with a stated myth and then proof to back it up? That way it's possible to weed out the people who think something.

Like a snopes for car audio?

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Old 03-09-2010   #21
 
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Default Re: Misconceptions in car audio

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Like a snopes for car audio?
Yeah I guess that is what I meant. I think if it was kept accurate and free of opinions it would be pretty useful.
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Old 03-09-2010   #22
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Default Re: Misconceptions in car audio

"Putting subs in front of the car will ensure the bass is coming from the front"

I don't know if this is a myth or what, but last year at finals, I sat in several cars with subs in the dash, center console or even kick panels and in a couple of those (cars and people will remain nameless) me and several others noticed the bass seemed to be coming from the rear or hard to locate. I believe you need to properly blend and eq no matter where they are physically located. I heard others where the subs were in the trunk and seemed as they were out on the hood!
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Old 03-09-2010   #23
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Default Re: Misconceptions in car audio

Flat RTA = SQ nirvana
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Default Re: Misconceptions in car audio

... anything i believe ...

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Default Re: Misconceptions in car audio

Big subs are "slower" , small subs are "tighter".

And...

That people don't realize that power is 10 base logarithmic to SPL.

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