How big of a capacitor should I get?
Im getting a 4000 watt, 2000rms amp and i wanna know how many farad capacitor i need.
heres the amp http://cgi.ebay.com/QUANTUM-AUDIO-MONO-CAR-STEREO-AMPLIFIER-4000-WATTS-AMP_W0QQitemZ120230824318QQihZ002QQcategoryZ64570QQssPageNameZWDVWQQrdZ1QQcmdZViewItem
If your total system power is 1000 watts RMS or more, you will need to:
1. Upgrade the alternator to a high output alternator
2. Upgrade to a heavy duty deep cycle battery
3. Upgrade the "Big 3" - that is to replace (or add to) the power wire between the battery and alternator, the ground from the battery to the chassis and the ground strap from the engine/tranny to the chassis with at least 1/0 AWG wire.
Failure to do this will result in you replacing them anyway as the alternator will eventually fail.
Here is a guide that will calculate what size alternator and power wires you need http://www.datafilehost.com/download.php?file=6d26c621
A second battery is never a good idea as it's an added strain on the alternator to charge two batteries AND supply power for the car. The ONLY time a second battery is useful is if the audio system is to be used with the car off.
A capacitor is only good so far as the audio system isn't trying to pull too much from the electrical system. A cap doesn't provide more power, it's designed to 'stiffen' the voltage to the amp, nothing esle. If the current isn't there, a cap won't help. The alternator must have at least 20% more amperage power than the entire vehicle and sound system combined for a cap to be of benefit which is ironically the same requirements for an amp to be efficient.
See my site for more info http://spkrbox1.spaces.live.com
More Info:
BOSS AUDIO PH5000D 5000W MONO D Car Amplifier + 4 Gauge Amp Installation Kit, BOSS AUDIO R1100M 1100W Mono Car Power Amplifier Amp, BOSS AUDIO R1600M 1600W Mono Car Power Amplifier Amp, *NEW* JL AUDIO® JX250/1 MONO CLASS A/B 250W JX CAR STEREO AMPLIFIER AMP JX-250/1, KICKER DX500.1 CAR SUBWOOFER POWER AMPLIFIER, POWER ACOUSTIK CPT1-2200D CAR AUDIO MONO BLOCK MONOBLOCK CLASS-D AMPLIFIER AMP, INFINITY REFERENCE 1300A IN CAR AUDIO MONOBLOCK MONO BLOCK CLASS-D AMPLIFIER/AMP, KICKER 2012/12 ZXS1500.1 CAR AUDIO MONO CLASS-D 1500W ZXS AMPLIFIER AMP +REMOTE, BOSS AUDIO R1100M 1100W Mono Car Power Amplifier Amp, Power Acoustik BAMF5500/1D 5500 Watt Mono Car Audio Amplifier + 4 Gauge Amp Kit, POWER ACOUSTIK BAMF2000/1d MONO AMP AMPLIFIER NEW donk Car Audio bamf 2000 1d, POWER ACOUSTIK BAMF2000/1d MONO AMP AMPLIFIER USED donk Car Audio bamf 2000 1d, New MA Audio 1600 Watt Car Amplifier Mono Block Sub Amp, KICKER ZX1500.1 MONO CAR AUDIO AMP 1500W AMPLIFIER NEW, LANZAR OPTI2000D 2000W MONO Car Audio Amplifier Amp BRAND NEW IN BOX , NEW Rockford Fosgate T500-1bd Mono-Channel Car Audio Amplifier, RE AUDIO XTX5000.1 MONO CLASS D XTX SERIES DIGITAL CAR AMPLIFIER 5000 WATT NEW, NEW HIFONICS GLX22001D 2200W CLASS D MONO CAR AUDIO AMPLIFIER AMP GLX2200.1D, NEW JENSEN POWER9001 900W MONO BLOCK CAR AUDIO AMPLIFIER AMP 900 WATT POWER900.1, Legacy New LA1400 Slim 2000Watt Mono Block Car Audio Subwoofer Amp Amplifier, POWER ACOUSTIK CPT1-5500D CAR AUDIO CLASS-D MONOBLOCK MONO AMPLIFIER/AMP +REMOTE, CERWIN VEGA HED1000.1 CAR AUDIO MONOBLOCK MONO BLOCK 1000W POWER AMPLIFIER/AMP, CERWIN VEGA HED500.1 CAR AUDIO MONOBLOCK MONO 500W CLASS-AB AMPLIFIER/AMP+REMOTE, Planet Audio AP1000D 1000W Peak 650W RMS Mono Car Amplifier + 4 Gauge Amp Kit, Kicker 11IX500.1 500 Watt RMS Mono Car Audio Class “D” Sub Amplifier + Amp Kit, RE Audio XT4000DE V3N 1600 Watt RMS 4000 Watt Mono Car Amplifier Amp XT4000 DE, Planet Audio AP2000D 1400 Watt RMS 2000W Peak Mono Car Amplifier + 4 AWG Amp Kit, PLANET AUDIO RXD2400 3000w MONO CAR AMPLIFIER+WIRE KIT, Planet Audio AP1500D 1500W Peak 1000W RMS Mono Car Amplifier + 4 AWG Amp Kit, Bass Inferno BI2000DX 2000 Watt RMS Mono Car Audio Amplifier + 4 Gauge Amp Kit, Planet Audio RXD1400 1400W RMS 1900W Peak Mono Car Audio Amplifier+4 AWG Amp Kit, Quantum Audio QA3000D 3000 Watts RMS Mono Block Car Amplifier + 4 Gauge Amp Kit, ALPINE PDX-M6 CAR AUDIO MONOBLOCK MONO BLOCK CLASS-D 600W POWER AMPLIFIER/AMP, ALPINE PDX-M12 CAR AUDIO MONOBLOCK MONO BLOCK 1200W POWER CLASS-D AMPLIFIER/AMP, KICKER 2012/12 PX200.1 CAR AUDIO STEREO PX POWERSPORT MONO 200W AMPLIFIER AMP, KICKER 2012/12 ZXS1000.1 CAR AUDIO MONO CLASS-D 1000W ZXS AMPLIFIER AMP +REMOTE, POWER ACOUSTIK CPT11500 IN CAR AUDIO CLASS-AB MONO BLOCK AMPLIFIER/AMP CPT1-1500, Alpine MRX-M55 X Series 550 Watt Digital Mono Car Audio Amplifier Amp MRXM55, Boss Armor AR4000D 4000w Mono Car Audio Class D Power Amplifier+Remote+Amp Kit, RE Audio XTX1500.1 2000W Mono Class D Subwoofer Car Amplifier Amp +Amp Kit, Power Acoustik BAMF2000/1D 2000W Peak 1200W RMS Mono Amplifier Car Audio Amp, Boss Armor AR3000D 3000w Mono Car Audio Class D Power Amplifier+Remote+Amp Kit, Quantum Audio QCA3500D Class D 1750 Watt RMS Mono Car Amplifier + 4 AWG Amp Kit, MTX AUDIO RTS10-04 500W MAX 10" SINGLE 4-OHMS ROAD THUNDER SERIES CAR SUBWOOFER, QUANTUM AUDIO QA2000D 2000w MONO CAR AMPLIFIER+WIRE KIT, Alpine MRX-M100 1000 Watt RMS Mono Digital Class D Car Audio Amplifier MRXM100, Hifonics Zeus ZRX1000.1D 1000W Mono Class D Car Audio Amplifier + Amp Kit, Quantum Audio QA4000D 4,000 Watts Mono Car Amplifier + WK41 Amp Wire Kit, Kicker 11IX500.1 500w Mono Car Audio Class D Amplifier IX500.1+Amp Kit+Capacitor, POWER ACOUSTIK CPT1-2000 2000W MAX CAR AUDIO 1-CHANNEL AMPLIFIER W/ BASS REMOTE,