Battery Isolator w/ or w/o a Capacitor?

OK guys, here is my situation:  I have 3 10 inch JVC DVC subs each powered with a single JVC amplifier.  My power wire is Stinger 1/0 with a 300 amp inline Rockford Fosgate fuse. I have a Optima battery in the engine compartment for the power pull.  On my remote wire I have a relay to boost the voltage; the same goes for my RCA's with a Planet Audio balanced line driver to assist my subwoofer amplifiers(  this does not seem to work properly in my eyes, quite possibly the installation--maybe).  I also have 2 each JVC 4 channel amplifiers--one to push the front door seperates (2 pair of 6.5 inch JVC component sets) and the second to push 2 pair of JVC 6X9's in my rear deck.  I have a Rockford Fosgate 1 farad cap on my 2 4 channel amps at this time, awaiting a cap big enough to hold the sub amps---possibly a 8 farad...not to mention a secondary battery and battery isolator.  I guess my question is this:  with all this in my 1992 Nissan Primera ( Infiniti G20 stateside) will the isolator and cap be suffice to keep my lights from dimming with the bass pull?

thanks again, your forum and site is always a great assistance

https://www.the12volt.com/installbay/forum_posts.asp?tid=73496&PN=1

^^^^How to upgrade the big three^^^^

Thanks alot for your help.  I kind of thought of those but got some bad advice.  I will do the "big three" and see how things go.  I have already ordered the isolator and the secondary battery - kenetik actually. 

again, thank you

For the alternator, I am not a hundred percent positive. I am not sure what you have available in your location. I know Stinger and KnuKonceptz offer HO alt. There is probably more information within this site on specific places to look. If you are ordering all your parts online than certainly shop around, before you make a purchase post the link of the item on here if you are not certain if the alt. will fit your application.

As for your engine noise, certainly double check all your connections, make sure your wires did not get damaged etc. Make sure your RCA lines are not running with any power wire. ( eg. I will always try to run power wire down say the left side of the vehicle, and RCA and speaker wires down the right side) Make sure your amplifiers are grounded properly to a structural mount. After this, in-line noise filters are available, and they easily adapt into your rca lines. (eg. Stinger SGLI ground loop isolater). For the amount of amplifiers you are running I would  use a a good quality RCA line (heavy, thick jacketed) though this is a personal preference.

Thanks ya'll, seriously.  So first I am going to do 'the big three' this weekend.  Secondly, I have already ordered the first battery isolator/high power relay for the secondary battery.  Thirdly I am going to re-trace and run my wiring ( all of it). And then make sure that no wires are crossing each other. 

So my set up looks like this as we type but I do want to add a dual 12 inch with the same JVC amp each (same as each 10 inch).  These are being run in the back seat(removed).  With this in mind, will I require yet another isolator/relay and battery(a third) or will the two high output batteries, the isolator and new grounding system be enough?  I have ventured out there to see if I can find a high output alternator as well -- no such luck right now, not for my car -- 1992 Nissan Primera ( J-spec).  2.0 engine w/ a 60 amp stock alternator.  I have been looking through 'Stinger' webpage but it is not very user friendly, next is the KnuKonceptz site.  Again, thanks for everything.  Love this site!!!!!