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extra battery or cap?


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bumpinexploder 
Copper - Posts: 265
Copper spacespace
Joined: February 06, 2008
Location: Texas, United States
Posted: July 08, 2008 at 9:50 PM / IP Logged  
i know everyone se this thread and is gonna kill me for the idea of using a cap but hear me out! i have 4 cvr 12s and i am only pushing 300 watts to them as of stock electrical and a red top under the hood. thing is, the guy i bought the subs from is a shop owner in dallas and he seemed to know his stuff! well he had a 20 fared cap and 1 yellow top under the hood with STOCK electrical and was hitting well over 140s. i couldnt even sit in the truck. my question is, how was it that loud with stock electrical and a cap? i always hear bad things about caps. but he told me the extra battery would be liike 100 fared cap or somehting. but my alt. woulndt charge both red tops sufficiently. so should i get a big cap with a new amp or a new alt? with the same battery, or a extra battery in the back? any help would be awesome!
Pioneer DEH-400UB
Kicker 150.2 mids/highs amp
MB Quart fsa 216 front stage
AudioPipe gd-6001 mono amp
AUDIOQUE SD 15S PREFAB BOX!
C&D Technologies Battery, 1500 CCA, 134 amp storage
149.5 DB's
theterminator 
Copper - Posts: 96
Copper spacespace
Joined: July 19, 2007
Posted: July 08, 2008 at 10:45 PM / IP Logged  
140 is defenantly possible. Im hitting 146.2 with one 15. My battery is stock and i have a 1 Farad capacitor.
bumpinexploder 
Copper - Posts: 265
Copper spacespace
Joined: February 06, 2008
Location: Texas, United States
Posted: July 08, 2008 at 10:57 PM / IP Logged  
well mine hits 140 on the ISAC meter but thats why i said his was louder than 140 cuz his was LOUDDD lol. just curious what 15 and amp wattage do you have that hits 146? not doubting just wonderin. and do your headlights dim or does your voltage drop with just a 1 fared?
Pioneer DEH-400UB
Kicker 150.2 mids/highs amp
MB Quart fsa 216 front stage
AudioPipe gd-6001 mono amp
AUDIOQUE SD 15S PREFAB BOX!
C&D Technologies Battery, 1500 CCA, 134 amp storage
149.5 DB's
theterminator 
Copper - Posts: 96
Copper spacespace
Joined: July 19, 2007
Posted: July 08, 2008 at 11:12 PM / IP Logged  
Im running a TC Sounds TC3000. I running an Arc Audio FD1200 thats puts out 1100w RMS. box is ported tuned at 30hz. My headlights dim. My voltage never drops below 12.5. I would skip the Cap and buy a battery. I just ordered a kinetik.
theterminator 
Copper - Posts: 96
Copper spacespace
Joined: July 19, 2007
Posted: July 08, 2008 at 11:41 PM / IP Logged  
Of course the the best thing to do would be to buy a HO alternator.
aznboi3644 
Gold - Posts: 2,600
Gold spaceThis member consistently provides reliable informationspace
Joined: May 01, 2006
Location: United States
Posted: July 09, 2008 at 1:20 AM / IP Logged  
audible loudness is different from a single pressure point reading on the dash.
bumpinexploder 
Copper - Posts: 265
Copper spacespace
Joined: February 06, 2008
Location: Texas, United States
Posted: July 09, 2008 at 7:03 AM / IP Logged  
explain more please aznboi.
Pioneer DEH-400UB
Kicker 150.2 mids/highs amp
MB Quart fsa 216 front stage
AudioPipe gd-6001 mono amp
AUDIOQUE SD 15S PREFAB BOX!
C&D Technologies Battery, 1500 CCA, 134 amp storage
149.5 DB's
aznboi3644 
Gold - Posts: 2,600
Gold spaceThis member consistently provides reliable informationspace
Joined: May 01, 2006
Location: United States
Posted: July 09, 2008 at 9:25 AM / IP Logged  
I'll let Pete Kulicki explain.
Decibels and Performance
haemphyst 
Platinum - Posts: 5,054
Platinum 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: January 19, 2003
Location: Michigan, Bouvet Island
Posted: July 09, 2008 at 9:46 AM / IP Logged  
aznboi3644 wrote:
I'll let Pete Kulicki explain.
Decibels and Performance
Bravissimo!!! This is what I've been trying to tell people for YEARS!
It all reminds me of something that Molière once said to Guy de Maupassant at a café in Vienna: "That's nice. You should write it down."
DYohn 
Moderator - Posts: 10,741
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: July 09, 2008 at 10:08 AM / IP Logged  

A good article.  Of course the green graph is exactly what an SPL competition vehicle is designed for - and way too many people who "just want it loud" end up with, while the blue graph is the one that might sound good.

extra battery or cap? -- posted image.

Anyone with a 140db vehicle who drives around with it performing at that level will very soon go deaf.  Please understand that if you are in a vehicle producing over 100db SPL you really need to wear hearing protection.  http://www.dangerousdecibels.org/hearingloss.cfm

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