Esky_addict Posted December 14, 2017 Share Posted December 14, 2017 Is there a car audio thread? anywho i scored a old ups battery from work this be allright for a second battery in the boot? Quote Link to comment Share on other sites More sharing options...
h4nd Posted December 14, 2017 Share Posted December 14, 2017 Should be good. But make good connections, clean tight lugs. Quote Link to comment Share on other sites More sharing options...
Esky_addict Posted December 14, 2017 Author Share Posted December 14, 2017 sweet I'll give it a go, I just take the existing positive from battery to amps and connect it up to new battery and earth the negative aye Quote Link to comment Share on other sites More sharing options...
Carsnz123 Posted December 14, 2017 Share Posted December 14, 2017 A good idea might be to put a diode circuit in too to keep the 2 batteries separate. Then you can run your audio with the car off and not worry about flattening your cranking battery. Quote Link to comment Share on other sites More sharing options...
chris r Posted December 14, 2017 Share Posted December 14, 2017 Vsr or voltage switching relays are better /easier than diodes but same end result 2 Quote Link to comment Share on other sites More sharing options...
Esky_addict Posted December 14, 2017 Author Share Posted December 14, 2017 that' not a bad idea. would it kind of defy the point of a 2nd battery though as it would isolate the batterys when you need it like when the bass hits or am I missing something (VSR That is) Quote Link to comment Share on other sites More sharing options...
chris r Posted December 14, 2017 Share Posted December 14, 2017 Na it'll connect when the alternator is charging (with no voltage drop compared to diodes) and Isolate when voltage is below x Quote Link to comment Share on other sites More sharing options...
Esky_addict Posted December 14, 2017 Author Share Posted December 14, 2017 Oh yep sounds good. Anyone know of a good site to get some info on wiring subs up to an amp properly, I've dragged my old subs and amp out to chuck in hq, I haven't had them in a car for a few years and am not sure I had them wired up correctly, they are rockford P2D4-12 subs and a PRS-d1100m pioneer amp. I'e just been having a look on the net about the different ways of wiring them 1ohm 4ohm etc Quote Link to comment Share on other sites More sharing options...
nvmyvl Posted December 14, 2017 Share Posted December 14, 2017 have you got a model number for the battery? i grabbed a heap of ups batteries from my old work, and they were only 7aH. useless for anything that needs power, even if it has a full size car battery hooked up to it. Quote Link to comment Share on other sites More sharing options...
Esky_addict Posted December 14, 2017 Author Share Posted December 14, 2017 Quote Link to comment Share on other sites More sharing options...
DB8-TypeR Posted December 14, 2017 Share Posted December 14, 2017 Why do you need an additional battery? Running a couple subs certainly wont require one, its just added complication 1 Quote Link to comment Share on other sites More sharing options...
Esky_addict Posted December 14, 2017 Author Share Posted December 14, 2017 They were cutting out but after some googling last night that may be because they are DVC subs wired up to 1ohm and this amp is 2ohm stable. Quote Link to comment Share on other sites More sharing options...
Esky_addict Posted December 14, 2017 Author Share Posted December 14, 2017 And its pretty simple really only need to add another earth to setup. Cheap alternative to a capacitor. Quote Link to comment Share on other sites More sharing options...
Bling Posted December 19, 2017 Share Posted December 19, 2017 How good is the car battery and how good is this one? They both test up sweet under load? Unless the car battery is stuffed, it sounds like you're 'fixing' a problem that isn't there. If you're overloading the amp, you can have 100 batteries and still have the same problem. Old UPS batteries are probably on their way out to start with, they don't last forever. Just my2c anyway, sounds like you're on a mission to fit that battery lol, so best of luck. Quote Link to comment Share on other sites More sharing options...
Esky_addict Posted December 19, 2017 Author Share Posted December 19, 2017 Haven't load tested battery in car but starts 173 and was starting xr6t fine, the ups battery was tested when they were taken out and all the rooted ones were turfed. Lol yea I was oblivious to the whole impedance thing when i had the stuff in other cars I just thought that the juice couldnt keep up. Problem looks to be semi solved just buy wiring the dual voice coils in series instead of parallel. Quote Link to comment Share on other sites More sharing options...
DB8-TypeR Posted December 19, 2017 Share Posted December 19, 2017 On 15/12/2017 at 08:59, Esky_addict said: And its pretty simple really only need to add another earth to setup. Cheap alternative to a capacitor. Capacitors are a waste of money, 1 decent battery, good supply cable, good earth. Thats all that is needed. Its only 2 subs, hardly a high powered system 1 Quote Link to comment Share on other sites More sharing options...
Muncie Posted December 23, 2017 Share Posted December 23, 2017 Recently got back in to sounds again. About 15 years ago scored 4 Orion extreme dual voice coil subs out of a sound off car as part trade on my chopper. They got stuffed in the boot of a Honda civic which at 3/4 volume would suck the sunroof off it's tracks. Use big cable and run both positive and negative back to your battery keep your RCA'S as far away from your power as possible and you should be off to a good start. My sound off car took 2 runs of 0 gauge cable and 2 alternators to crank properly. I used 2x runs so I didn't have huge snakes under my carpet. 2 Quote Link to comment Share on other sites More sharing options...
Muncie Posted May 30, 2018 Share Posted May 30, 2018 Just bought this throwback to the 90s brand new in the box. Now to see if it can run some subs all the instructions are hilarious showing a tapedeck. Built before amps had crossovers in them it used to have to be plugged into a companion box to get low pass curiously it can run as a 3 channel with this Eq box. As my headunit has a sub-out i wouldn't mind betting it'll work and sound beautiful. If it cant run them i have something else suitable but not as cool. Quote Link to comment Share on other sites More sharing options...
Muncie Posted May 30, 2018 Share Posted May 30, 2018 Also fixing up a slightly newer but compact and gruntly Alpine Flex 4 channel amp which has had a channel pop replacement FETs for that arrived this week doing all four channels to freshen everything up. Got a big 2 channel pioneer on the way as well. Will chop and change see what sounds best. Quote Link to comment Share on other sites More sharing options...
Scrubb Posted May 30, 2018 Share Posted May 30, 2018 On 12/14/2017 at 20:18, Esky_addict said: Oh yep sounds good. Anyone know of a good site to get some info on wiring subs up to an amp properly, I've dragged my old subs and amp out to chuck in hq, I haven't had them in a car for a few years and am not sure I had them wired up correctly, they are rockford P2D4-12 subs and a PRS-d1100m pioneer amp. I'e just been having a look on the net about the different ways of wiring them 1ohm 4ohm etc https://www.rockfordfosgate.com/support/wiring-wizard/ 1 Quote Link to comment Share on other sites More sharing options...
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