2 caps to equal one value... wiring question.

11tsteve
11tsteve Posts: 1,166
edited December 2012 in DIY, Mods & Tweaks
i am starting to rebuild the crossovers for my Infinity RSb's this morning, and i have a quick question. i have ended up needing to use 2 caps to create a larger value, and i don't know if they need to be soldered in parallel or can the be soldered in series?

thanks

steve
Polk Lsi9
N.E.W. A-20 class A 20W
NAD 1020 completely refurbished
Keces DA-131 mk.II
Analysis Plus Copper Oval, Douglass, Morrow SUB3, Huffman Digital
Paradigm DSP-3100 v.2
Post edited by 11tsteve on
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  • bmbguy
    bmbguy Posts: 416
    edited December 2012
    Capacitance values add when wired in parallel. If you're using two (or more) smaller values to create one large value, they must be connected in parallel.
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  • 11tsteve
    11tsteve Posts: 1,166
    edited December 2012
    thanks very much!
    Polk Lsi9
    N.E.W. A-20 class A 20W
    NAD 1020 completely refurbished
    Keces DA-131 mk.II
    Analysis Plus Copper Oval, Douglass, Morrow SUB3, Huffman Digital
    Paradigm DSP-3100 v.2
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  • VR3
    VR3 Posts: 28,746
    edited December 2012
    That Clarity is huge aint it! :-P
    - Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
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  • 11tsteve
    11tsteve Posts: 1,166
    edited December 2012
    VR3 wrote: »
    That Clarity is huge aint it! :-P
    you ain't kidding!!!!

    i have been trying to take some pointers from what you did with the Monitor 10 Xovers because i really think i do need a second level to get this together . got myself a bunch of perf board, bunch of hardware, some 18 AWG solid copper, and various other odds and ends... attempting a plan just to make it all fit.

    one thing is for sure... i am going to be glad i have a 10" woofer hole to get this back into the enclosure.
    Polk Lsi9
    N.E.W. A-20 class A 20W
    NAD 1020 completely refurbished
    Keces DA-131 mk.II
    Analysis Plus Copper Oval, Douglass, Morrow SUB3, Huffman Digital
    Paradigm DSP-3100 v.2
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  • VR3
    VR3 Posts: 28,746
    edited December 2012
    Send me a picture...

    Would love to help!
    - Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
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  • 11tsteve
    11tsteve Posts: 1,166
    edited December 2012
    VR3 wrote: »
    Send me a picture...

    Would love to help!
    ok, it hasn't been a great day here, and there have been too many "distractions" to really get anywhere. i have learned not to hurry these projects, and try not to get too upset if things go awry as that only causes me to either hurry, or lose focus.

    i have one torn apart, and the new Cardas binding posts in, and a basic start on the ground floor. the snag i hit was it seems my 30W soldering pencil will not heat the new Cardas posts enough for the solder to take, so i will need to invest in, what, a 45W gun/pencil?

    i appreciate you taking a look. involved with dinner right now... try to get some pics up here. time has just evaporated today.... if i don't, i am not blowing anything off, i just ran out of time.:sad:
    Polk Lsi9
    N.E.W. A-20 class A 20W
    NAD 1020 completely refurbished
    Keces DA-131 mk.II
    Analysis Plus Copper Oval, Douglass, Morrow SUB3, Huffman Digital
    Paradigm DSP-3100 v.2
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  • VR3
    VR3 Posts: 28,746
    edited December 2012
    My digital weller even had some issues with those Cardas post - lots of metal to heat up!
    - Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
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  • 11tsteve
    11tsteve Posts: 1,166
    edited December 2012
    VR3 wrote: »
    My digital weller even had some issues with those Cardas post - lots of metal to heat up!
    and yet, when i grabbed the post from the backside of the crossover cover, it was definitely hot enough to make me scream like a little girl....
    Polk Lsi9
    N.E.W. A-20 class A 20W
    NAD 1020 completely refurbished
    Keces DA-131 mk.II
    Analysis Plus Copper Oval, Douglass, Morrow SUB3, Huffman Digital
    Paradigm DSP-3100 v.2
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  • VR3
    VR3 Posts: 28,746
    edited December 2012
    Oh yeah... you have to get it above the melting point of the solder which in most cases is something like... 422 degrees... I recommend some "helping hands"
    - Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
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  • skrol
    skrol Posts: 3,387
    edited December 2012
    11tsteve wrote: »
    i am starting to rebuild the crossovers for my Infinity RSb's this morning, and i have a quick question. i have ended up needing to use 2 caps to create a larger value, and i don't know if they need to be soldered in parallel or can the be soldered in series?

    thanks

    steve

    You can create a larger value capacitor by putting them in parallel, however, you want to try to split the desired value in half and parallel two capacitors of that value. For example, if you wan 12uF then you can parallel a 6uF with a 6uF. If you use values such as 10uF and 2uF to make the 12uF, the 2uF will tend to act as a bypass capacitor and will not give the desired result.
    Stan
    Stan

    Main 2ch:
    Polk LSi15 (DB840 upgrade), Parasound: P/LD-1100, HCA-1000A; Denon: DVD-2910, DRM-800A; Benchmark DAC1, Monster HTS3600-MKII, Grado SR-225i; Technics SL-J2, Parasound PPH-100.

    HT:
    Marantz SR7010, Polk: RTA11TL (RDO198-1, XO and Damping Upgrades), S4, CS250, PSW110 , Marantz UD5005, Pioneer PL-530, Panasonic TC-P42S60

    Other stuff:
    Denon: DRA-835R, AVR-888, DCD-660, DRM-700A, DRR-780; Polk: S8, Monitor 5A, 5B, TSi100, RM7, PSW10 (DXi104 upgrade); Pioneer: CT-6R; Onkyo CP-1046F; Ortofon OM5E, Marantz: PM5004, CD5004, CDR-615; Parasound C/PT-600, HCA-800ii, Sony CDP-650ESD, Technics SA 5070, B&W DM601
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  • cristo
    cristo Posts: 231
    edited December 2012
    Bypass capacitors have a placebo effect proportional to the cost of the cap.
    Of course the user has to know the cost for it to work properly.
    Otherwise, they just increase the total capacitance by an unnoticeable bit.
    cristo

    NAD C 545BEE cd player, Philips AF877 turntable / Shure V15V-MR with JICO SAS stylus,
    Tascam 122 mkIII cassette deck, Harman Kardon 3480 receiver, Terk FM-50 antenna in the attic,
    Soundcraftsmen SE550 stereo equalizer, Polk Monitor 10a speakers
    (with Sonicraft/Solen/Mills crossover rebuild)
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  • zingo
    zingo Posts: 11,258
    edited December 2012
    With a quality film cap, a bypass cap is a thing of the past. I only use them with large value electrolytic caps to balance frequency response; i.e. a 4.7uf film cap bypassing a 10000uf electrolytic.

    cristo wrote: »
    Bypass capacitors have a placebo effect proportional to the cost of the cap.
    Of course the user has to know the cost for it to work properly.
    Otherwise, they just increase the total capacitance by an unnoticeable bit.
    Jake
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  • slider2828
    slider2828 Posts: 118
    edited December 2012
    Thanks for the tip skrol.
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