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Bloated Car Bass [message #70389] Mon, 05 December 2011 14:38 Go to next message
AudioFred is currently offline  AudioFred
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Registered: May 2009
Location: Houston
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I've noticed new car audio systems sound much like the sound you hear in any big box store - the bass is turned waaaaay up to produce a bloated boomy fartbox-subwoofer midbass sound. Since this is the only place where most people can hear anything better than computer or TV speakers, I believe they assume this is "good" sound. This is the only explanation I can think of for the reason why every non audiophile I know who has a subwoofer sets it about 10dB to 20dB too loud.

I was curious about my Nissan Sentra. To hear natural sounding midbass I have to turn the bass down to -4 on a scale of -5 to +5. I measured the sound with the audio controls all set to zero, doors and windows closed, and the measurement mike placed atop the driver's side headrest (about ear level for the driver). Here's the sad story:

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Re: Bloated Car Bass [message #70391 is a reply to message #70389] Mon, 05 December 2011 17:17 Go to previous messageGo to next message
Wayne Parham is currently offline  Wayne Parham
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Yo, Fred, you got one a dose cars dat makes de trunk buzz an go boom boom.

Sorry for my bad ebonic impression. Best I could do. Laughing

Re: Bloated Car Bass [message #70392 is a reply to message #70391] Mon, 05 December 2011 18:00 Go to previous messageGo to next message
AudioFred is currently offline  AudioFred
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Wayne Parham wrote on Mon, 05 December 2011 17:17

Yo, Fred, you got one a dose cars dat makes de trunk buzz an go boom boom.



No, this cheap Sentra has the basic radio and not the super high quality Bose system Laughing . Doesn't even have a subwoofer. Rap sounds more like "mo fo ho" instead of "MO! FO! HO"!
Re: Bloated Car Bass [message #70393 is a reply to message #70392] Mon, 05 December 2011 20:43 Go to previous messageGo to next message
Shane is currently offline  Shane
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Most factory car audio sounds like crap, period!

Most people who think car audio with uber bass sounds like crap have only heard them from the outside of the car.

I've listened to pro car systems that cost as much or more than a lot of the high-end home systems. I've never heard a home system that sounds anything remotely like what I have heard at rock concerts or any live concert that has someone actually playing a kick-drum or hitting a low B on a 5 string bass. I don't mean those little coffee house bands either or orchestra stuff.

Yes, some of them do have ill-defined bass and as such do sound like crap. But the good ones, the really good ones, are sheer pleasure to listen to. When I'm standing in the 3rd row of a concert or up on stage in front of the kick drum I can FEEL the bass damn near move me. Most of the home systems I have heard that have so called "natural" bass have no bass at all. Just blends right in and disappears. Fine if you're listening to acoustic guitar or orchestra, but electrically amplified instruments are designed to be able to be visceral IMO.

One of the best stereo systems I ever heard, car or home, was in a pro audio rig in a car. He had 4ea 6.5" subs with 100W amp going to each one. The bass was phenomenally tight and deep with no boom whatsoever, with the rest of the car essentially controlled with a DEQX type system to balance everything out.

Sorry, but I get very tired of the hi-fi crowd saying that car audio always sounds like crap. When done right they are very, very good, regardless of what the measurements say.
Re: Bloated Car Bass [message #70398 is a reply to message #70389] Tue, 06 December 2011 01:24 Go to previous messageGo to next message
Freddy is currently offline  Freddy
Messages: 60
Registered: November 2011
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I generally agree with Shane, I think some car audio systems sound amazing. The problem is that many people think they have a good system, when they really don't. So I can understand the bad reputation associated with this.

When a friend tells me to check out how great the bass in their car is, I'm usually skeptical. Once in a while it does impress me though.
Re: Bloated Car Bass [message #70399 is a reply to message #70393] Tue, 06 December 2011 05:46 Go to previous messageGo to next message
AudioFred is currently offline  AudioFred
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Location: Houston
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Shane wrote on Mon, 05 December 2011 20:43
I've never heard a home system that sounds anything remotely like what I have heard at rock concerts or any live concert that has someone actually playing a kick-drum or hitting a low B on a 5 string bass... Sorry, but I get very tired of the hi-fi crowd saying that car audio always sounds like crap. When done right they are very, very good, regardless of what the measurements say.



I agree. Well designed car audio systems that use high quality components do sound amazing. They do exactly what they're designed to do: to reproduce the sound with an overemphasis of the frequency extremes. But the issue I raised, which your response confirms, isn't whether car audio sounds "good" or "like crap". The issue is that the sound of the typical car audio system is highly colored, and this colored sound is what many people perceive as "good" sound.

Re: Bloated Car Bass [message #70404 is a reply to message #70399] Tue, 06 December 2011 19:37 Go to previous messageGo to next message
gofar99 is currently offline  gofar99
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Hi Shane, Stop by sometime and hear the bass. My system uses Martin Logan ESLs for everything above 50HZ. Below that is a pair of 7 cubic foot Altec Lansing cabinets with 15 inch subs that are flat to 23 HZ. You can feel the drums just fine. It also means that everything has to be tied down or it walks away. Back to car audio.... I have heard some that are pretty good, but more frequently not. There are challenges in cars that the average home doesn't face. Size, good locations for speakers, and so on. I am amazed that any sound good. I have noticed a trend it seems. Auto companies are going more for features like MP3 plug ins, USB touch screens and such and not on the sound quality itself. Rolling Eyes It speaks to the market place. They build what will sell. Anyhow for what it is worth, I don't usually listen to anything in the auto. Peace and quiet is hard to find and when I drive alone it is one of the few places that you can get that. Smile

Good Listening
Bruce
Re: Bloated Car Bass [message #70406 is a reply to message #70404] Tue, 06 December 2011 19:47 Go to previous messageGo to next message
Shane is currently offline  Shane
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gofar99 wrote on Tue, 06 December 2011 19:37
Anyhow for what it is worth, I don't usually listen to anything in the auto. Peace and quiet is hard to find and when I drive alone it is one of the few places that you can get that. Smile


I listen to NPR more than music anymore. Music maybe on the drive home from work as a tension release.

Re: Bloated Car Bass [message #70412 is a reply to message #70406] Wed, 07 December 2011 00:43 Go to previous messageGo to next message
Wayne Parham is currently offline  Wayne Parham
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Registered: January 2001
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There is one very good thing that happens in cars: The absense of room modes in the bass. The pressure region goes way up high - cabin gain actually works all the way up to about 60Hz. It just isn't hard at all to pressurize a couple cubic meters and without modes, it's strong and smooth. Even if it's a little lossy, you still get cabin gain because the pressure is dynamic, sort of like how piston rings can hold pressure long enough to provide usable force even though there is some amount of blow-by. But what you pay for in the trade for getting all this great bass is high reflectivity in the midrange and treble, and no really good places to put speakers in that environment that can provide any sort of imaging. I think that's the hardest part.

In spite of all that, I think you can make it sound pretty good in a car, with the right gear and setup. Just have to accept its limitations and not expect it to sound like "you are there" or anything like that. Best you can do it to bring the band in the car, the "they are here" thing. Kinda cramped for an orchestra, but just great for a four piece rock and roll band. Laughing

Good memories: I used to run a Concorde head unit with Alpine amps. Best tape/tuner system I've ever heard, incredible sound for that era (late 1970s to early 1980s). If you never heard one, don't think JVC or Pioneer "Supertuner", don't even think Alpine or Nakamichi. The Concorde was beter than most people's home stereos and the tape deck rivals the best gear available even today. For speakers, I ran one π speakers with JBL 2115 midwoofers for car audio. Sadly, those drivers aren't available anymore, but Fostex F200 are very much like them.

Re: Bloated Car Bass [message #70415 is a reply to message #70412] Wed, 07 December 2011 05:29 Go to previous messageGo to previous message
AudioFred is currently offline  AudioFred
Messages: 377
Registered: May 2009
Location: Houston
Illuminati (1st Degree)
Wayne Parham wrote on Wed, 07 December 2011 00:43

There is one very good thing that happens in cars: The absense of room modes in the bass. The pressure region goes way up high - cabin gain actually works all the way up to about 60Hz. It just isn't hard at all to pressurize a couple cubic meters and without modes, it's strong and smooth.



This accounts for the tactile bass of a kick drum or low B on a bass guitar that Shane mentioned - you have to be there and experience it yourself to understand this. You can actually feel the bass, just as you would at a live rock concert. This can be accomplished in a home system, but it requries some very exotic subwoofers, typically megawatt high efficiency horn-loaded subs like the ones that are used in dance clubs. I heard somewhere there's a sub called the 12Pi that can do this.
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