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My Car Audio VS My Home Audio


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mrmsudawgs 
Copper - Posts: 145
Copper spacespace
Joined: February 22, 2005
Location: United States
Posted: March 30, 2005 at 7:37 AM / IP Logged  
Thanks for all of the replies.
(1) I have already ran several scenarios through WinISD pro and came up with the same results. However, why then do "we" like choosing those 12", 15", and 18", woofers when installation space is not a factor? They are more expensive and take up more room. Why not just put an 8" in a big box and port it? Is there a difference in SPL?
(2) Let's say I remove my 10" polk, modify the box, and port for an 8" sub (polk or other brand). Let's also just say that the existing volume of the box will be oversized for an 8" sub in the manner we have been talking about. When I put my favorite CD in (John Denver - just kidding) and crank up the bass and power will I say (A) "Man! What a huge increase in bass" or (B) "Man - this 8" sub does not hit near as hard as my 10"
You guys are putting new ideas into my head - my wife will not be pleased [:>)
gumbi_12 
Copper - Posts: 53
Copper spacespace
Joined: May 19, 2004
Location: United States
Posted: March 30, 2005 at 10:02 AM / IP Logged  

mrmsudawgs wrote:
You guys are putting new ideas into my head - my wife will not be pleased [:>)

Yea...Im sure they have done that to alot of people. 

DYohn 
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Moderator spaceThis member has made a donation to the12volt.com. Click here for more info.spaceThis member has been recognized as an authority in Electrical Theory. Click here for more info.spaceThis member has been recognized as an authority in Mobile Audio and Video. Click here for more info.spacespace
Joined: April 22, 2003
Location: Arizona, United States
Posted: March 30, 2005 at 10:30 AM / IP Logged  

mrmsudawgs wrote:
. However, why then do "we" like choosing those 12", 15", and 18", woofers when installation space is not a factor?

Because it is easier to produce low frequency sound at higher SPL with larger diaphram drivers than it is to do so with smaller diaphrams.  Plus one should never underestimate the "wow that looks cool" factor in car audio.  Just ask all the kids who buy chrome-plated woofers and amps covered with flames and skulls.

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Poormanq45 
Silver - Posts: 597
Silver spacespace
Joined: October 27, 2004
Location: United States
Posted: March 30, 2005 at 11:14 AM / IP Logged  
mrmsudawgs wrote:
(1) I have already ran several scenarios through WinISD pro and came up with the same results. However, why then do "we" like choosing those 12", 15", and 18", woofers when installation space is not a factor? They are more expensive and take up more room. Why not just put an 8" in a big box and port it? Is there a difference in SPL?
You just answered your own qustion. Why put a smaller sub in a larger box when you could put a larger sub in a larger box?
Larger subs have more cone area which reduces the need for high excursions which reduces the requirement of alot of power.
Also, you must remember that home speakers are almost always more efficeint then car speakers because they're designed with no space limitatoins.
mrmsudawgs 
Copper - Posts: 145
Copper spacespace
Joined: February 22, 2005
Location: United States
Posted: March 30, 2005 at 1:28 PM / IP Logged  
Okay - I ran several scenarios through WinISD. Basically, no matter what size driver I put in a 0.74 cubic foot box the port's length becomes a problem. WinISD shows a nice looking graph when tuned to 40 hz but 40 HZ just seems too high to me - might sound boomy. The port's length was the reason I went with a sealed enclosure in the first place. Even with an 8" driver the port length is a problem.
Back to the inital question about my home theater system versus my truck's system - okay, I understand that now. Give me infinte room to build me a box and I can build you a great sounding, efficient enclosure. There are many physical constraints to be considered in car audio that forces one, like me, to build to what is available. I did that and I matched a great sub to go in it.
Do I wish I had started with an 8" in a vented enclosure? No because I would then wonder how that 10" would sound. Will I change my system? No because I am very happy with it now. The bass gets really low and it stays very tight. I like it even though I know I could make it go lower with porting and a larger space to build an enclosure.
Wait a minuteMy Car Audio VS My Home Audio - Page 2 - Last Post -- posted image. - larger space?? I have it!!   I could remove my back seat! I'd have tons of room then. No wait, the kids ride back there. Oh, I know! I'll put a cover on my bed and build a large box back there. With that much room I don't have to use an 8". Heck, I'll use an 18"!!! Cool! But I'll have to have more power, a new alternator, cut my truck's sheet metal to port into the cab......SOMBODY STOOOOOPPPPPP MMEEEEEEEEEEE!!!!
Mike
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