Page 1 of 7 1234567 LastLast
Results 1 to 10 of 61

Thread: cap math?

  1. #1
    Variable Bitrate red_parchel's Avatar
    Join Date
    Jul 2006
    Location
    Boston, Ma
    Posts
    280

    cap math?

    alright, here's the deal, i've been doing simple stereo installs for myself and my friends for about 6 years now, i've learned a lot, and i feel i've come a long way, i've always gotten away w/o needing to use caps ... by using efficiant amps and matching the subs well .. well last year i ended up w/ some big equipment, and i've got it in my '00 blazer LT,

    orion 2500D 2,500W RMS@1 Ohm driving a 1999 15" orion HCCA
    orion 50 watts x 4 chan. @ 4 Ohms
    200 watts x 4 chan. @ 2 Ohms
    200 watts x 2 chan. @ 4 Ohms Bridged
    driving 2 sets of memphis 15-MSYNC6 components
    the sub hits hard [as it should w/ 2500 watts

    but of COURSE the head lights "dim" ... now i know a cap isnt the "real" way out, i need a bigger altinator, [and prob a few caps] but for now i dont have the money to put in the kit Stinger [manufaturer of after market altinators] and local shops recomended

    and this just isnt a good enviroment to put a car computer in.
    for me another battery is not an option either for various reasons.

    so i know this is getting long but .. the 2500D takes 2 4gauge power feeds, the 4004 takes a 4gauge input, i havent run the cabling to my pc yet b/c i need to get the power spikes undercontrol ... the QUESTION finally is would 3[one for each power line] 1or2 farad caps do the trick? [at least till i can pony up the 800+ for the altenators/install] - i know thing WAY bigger then this have been done, even here on this site []

    thanks for the time reading this, i've gotten very mixed feelings on how to do this, hoping as a community i could get some good input here .. again thanks in advance!
    MobileThree: in car - Zotac Atom/ION - linuxICE 2.0.2

    --worklog--

  2. #2
    Low Bitrate stkdidy ntshidy's Avatar
    Join Date
    Jul 2003
    Location
    california
    Posts
    109
    if you listen to bass-heavy music at reasonable volume, a cap will not help at all...and actually could decrease performance if never given a chance to charge up in between heavy hits. i recommend running 0/1awg wire back into a splitter (into 3 4awg all fused individually). put in an optima yellow top. save up for an alt, which can be custom made for well under $600. another option is to install a second alt, but i dont think you need that complication at this point
    2005 Mustang GT:
    12w7...arc audio kar1000.2t...jl 300/4 pushng focal 165k2p...pioneer premier deh-880prs...tm-701l...audiocontrol eqs
    want: my stereo actually IN the car

  3. #3
    FLAC
    Join Date
    Jul 2001
    Posts
    1,109
    Every single bit of money you would put toward buying a cap SHOULD be put towards upgrading your charging system or putting in an extra battery.

    Caps don't work for car audio. Period.

  4. #4
    Maximum Bitrate
    Join Date
    Jun 2005
    Location
    chicago, Illinois
    Posts
    752
    A second battery would be more efficient and more cost effective than multiple amps
    "In the beginners mind there are many possibilities, but in the experts mind there are few."- Shunryu Suzuki
    "Do it right or don't do it at all"

    PROGRESS:
    [-------90%-] (New Car=New Build)

  5. #5
    FLAC
    Join Date
    Jul 2001
    Posts
    1,109
    If your full range amp is an HCCA amp, you need TWO batteries, not one. Class A/B amps like that draw a stupid amount of current.

  6. #6
    Variable Bitrate red_parchel's Avatar
    Join Date
    Jul 2006
    Location
    Boston, Ma
    Posts
    280
    i recommend running 0/1awg wire back into a splitter (into 3 4awg all fused individually).
    i ran 3 4awg wires b/c of space, i wanted to run the 0/1awg but it was just too damn big to hide *easily* in my blazer, as we know its not too flexable

    put in an optima yellow top. save up for an alt, which can be custom made for well under $600. another option is to install a second alt, but i dont think you need that complication at this point
    the yellow top is on the list, next thing to get

    the second alt was suggested by the local shop, but i just wasnt serious enough [they were talkin about takin out my a/c ... no way! ... but i think theres a new mounting bracket i wouldnt have to do that, but thats another story, ill poke around for custom altinators, any suggestions?

    so now that caps are completely bashed from my mind on ward to the second battery questions... parrelelle? isolated? 2 batteries means much heavier load on the altinator [there's some law i learned in college that proved that] so that would lead to a bigger altinator .. i think im seeing a pattern


    yes the 4004 is an a/b class amp ... a bit of good news is the 2500D is considered a class D amp ..


    thnx for quick replys since im a new postee, been reading here for a long time tho
    MobileThree: in car - Zotac Atom/ION - linuxICE 2.0.2

    --worklog--

  7. #7
    MySQL Error scott_fx's Avatar
    Join Date
    Dec 2004
    Location
    Los Angeles Ca
    Posts
    3,995
    Quote Originally Posted by Shadow

    Caps don't work for car audio. Period.

    my amps have caps inside of them
    New System in progress:
    M10k
    Phaze TD1500 ~> Dynaudio MD130
    Phaze TD1500 ~> Seas g18rnx/p
    Zapco Ref 500.1 ~ 12" tc-9
    Behringer DCX2496 ~ Envision Electronics psu
    Transflective Xenarc

    My Car Pc Install
    My Boat Pc worklog

  8. #8
    FLAC
    Join Date
    Jul 2001
    Posts
    1,109
    First, it's an alternator not altinator. Second, you've got room under the hood for a second battery. Third, as long as you never sit with your car off and play the system, your factory alternator could handle the secondary battery no problem. I had a 100A GM Smallcase alt that handled a normal lead acid and two 1100CCA batteries just fine. Fourth, if you want to isolate the batteries, that's cool, but high amperage isolators cost a LOT of money. I'd just parallel them.

    Red top = cranking battery
    yellow top = battery for system

    The yellow top is made to be deep cycled. With your alternator constantly charging it you'll see less benefit out of it. The red top is meant to be topped off most of the time.

  9. #9
    FLAC XC-C30's Avatar
    Join Date
    Jun 2006
    Location
    Abele, Belgium
    Posts
    1,260
    Quote Originally Posted by Shadow
    Caps don't work for car audio. Period.
    is that why so many people use them?

    and indeed, as scott said, that is probably why there are caps built inside an amp.


    don't want to diss you, but it's a matter of environment. for a yer'allday install it could be usefull. in db-drag -you're right- they're a no no. and for SQ, don't think they are used alot also. but still, for an all day ev'ry day install it can be usefull because most of them people are not going to spend $$$ on a yellowtop or an alternator.
    Xenia & Isabelle, totally in love!

    'T SQiekenkot: VOLVO 740GL 2.3

    CarPC: none at the moment
    CLARION HX-D2
    CLARION APA4300HX => Fountek NeoCd1.0 + TB W4-1337SD
    CLARION APA4300HX => CSS Trio8
    CLARION APA2100 => Dayton IB385-8

  10. #10
    Variable Bitrate red_parchel's Avatar
    Join Date
    Jul 2006
    Location
    Boston, Ma
    Posts
    280
    First, it's an alternator not altinator. Second, you've got room under the hood for a second battery.
    F7! ok so theres no spell check short cut .. sry 'bout that..

    i've spent a good amount of time under the hood of my '00 blazer, and there is no room for a second battery, w/o major modification to the fender, and i still dont think i could fit it, it's gunna have to be in the "trunk" *more wire* now the early 90's blazers TONS of room

    thanks for the info shadow ...

    ya from what i've learned for a high currant drawing system a cap is not the way to go.
    MobileThree: in car - Zotac Atom/ION - linuxICE 2.0.2

    --worklog--

Page 1 of 7 1234567 LastLast

Similar Threads

  1. Do I need a cap?
    By Maheriano in forum Newbie
    Replies: 25
    Last Post: 08-15-2006, 11:35 AM
  2. Replies: 3
    Last Post: 04-11-2005, 02:22 PM
  3. Using a high farad cap to survive engine crank
    By lakorai in forum Power Supplies
    Replies: 6
    Last Post: 03-28-2005, 09:47 AM
  4. Mastero MK4.5 Parts list Question?
    By 047025n in forum Power Supplies
    Replies: 5
    Last Post: 03-16-2005, 12:09 AM
  5. Anit-Crank-Drop cap solution?
    By All4Norway in forum Power Supplies
    Replies: 4
    Last Post: 01-07-2003, 08:20 AM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •