When reading the RMS output of a mono block car amp does it matter how many subs i have with x amount of Ohms?
I have 4 Alpine 1222d dual 2ohms with rms of 500w each. I also have an Alpine M2000 mono block amp Rms 1400w at 4ohms and Rms 2000w at 2ohms. Does this mean the amp should put out 2000w total to my subs? Are my subs now rated at 2000w Rms at 2ohms instead of 8ohms?
Yes, it matters. The number of subs, the number of voice coils, their individual impedances, and the wiring configuration determines the final impedance that the amp "sees".
To get the full power from that amp and with 4 subs, you really need the DVC 4 ohm models (SWR-1242D). 4 DVC 4 ohm subs can be configured to present a final impedance of 2 ohms. Wiring Option #1:
http://www.rockfordfosgate.com/rftech/woofer_wizard.asp?submitted=true&woofer_qty=4&woofer_imp=4
4 DVC 2 ohm subs can only be configured for either a 1 ohm load (too low for the amp) or 4 ohms.
The amp is not stable below 2 ohms.
With your combination, you'll be better off to wire the subs for a final impedance of 4 ohms and be satisfied with 1,400 watts RMS (350 watts to each sub). Otherwise, the 1 ohm wiring will cause the amp to draw excessive current, overheat, and eventually fail completely. Wiring Option #2.
http://www.rockfordfosgate.com/rftech/woofer_wizard.asp?submitted=true&woofer_qty=4&woofer_imp=3
More Info:
SOUNDSTREAM DTR1.1700D +2YR WARNTY NEW AMP CAR MONO 1 CHANNEL 1700W AMPLIFIER, Power or Ground Distribution Block 0 4 8 Gauge In/Out Car Amp Install Power Wire, POWER/GROUND DISTRIBUTION BLOCK (2) 1/0 (2) 4 (2) 8 GAUGE IN OR OUT CAR AMP WIRE, Coustic Car Audio 800DB Car Amplifier 400W D-Block Slightly Used, 20) NEW Streetwires FSAGU30 30 Amp AGU Car Block Fuses, New Acoustic Audio XS1601 1600 Watt Mono Block 1-CH Car Amplifier, PIONEER 800W MAX GM SERIES CLASS D MONO BLOCK CAR STEREO MOSFET POWER AMPLIFIER, PIONEER GM-D7500M 800W MAX CLASS D 1-CHANNEL CAR AUDIO MOSFET BASS AMPLIFIER, JL AUDIO MONO BLOCK 1-CHANNEL 500W CLASS A/B CAR SUB WOOFER FULL RANGE AMPLIFIER, ROCKFORD FOSGATE REN SERIES 850W 1 CHANNEL CLASS AB CAR STEREO MOSFET AMPLIFIER, ROCKFORD FOSGATE REN850S 850W MAX MONO BLOCK CAR STEREO MOSFET POWER AMPLIFIER, LANZAR OPTI2601D Optidrive Digital Mono Block 2600W 1/2 Ohm Stable Car Power Amp, XScorpion Fuse Holder AGU Power Distribution Block 2 4 8 Gauge Car Amp Install, HIGH END Dual AGU Fuse Holder Power Distribution Block 2 4 8 Gauge Car Amp NEW, POWER OR GROUND DISTRIBUTION BLOCK - 0 2 4 8 GAUGE IN OR OUT - CAR AMP INSTALL, Digital Power or Ground Distribution Block & Voltage Meter 0 2 4 Gauge Car Amp, DIGITAL POWER/GROUND DISTRIBUTION BLOCK VOLTAGE METER 0 2 4 AWG CAR AMP INSTALL, Car Amplifiers 100A 1 in 1 Out ANL Fuse Holder Block, CERWIN VEGA HED1000.1 CAR AUDIO MONOBLOCK MONO BLOCK 1000W POWER AMPLIFIER/AMP, NEW PIONEER GMD8500M 1200W MONO BLOCK CLASS D CAR AUDIO AMPLIFIER AMP GM-D8500M, Memphis 16-MCD500 Class D Mono Block Car Amplifier, 4 Gauge Ground / Power Distribution Block CAR RADIO AMP, 0 Gauge Ground / Power Distribution Block CAR RADIO AMP, 8) NEW Streetwires FSAGU30 30 Amp AGU Car Block Fuses, 8) NEW Streetwires FSAGU20 20 Amp AGU Car Block Fuses , 4) NEW Streetwires FSAGU20 20 Amp AGU Car Block Fuses , 4) NEW Streetwires FSAGU30 30 Amp AGU Car Block Fuses, 20) NEW Streetwires FSAGU30 30 Amp AGU Car Block Fuses, 700W*CALIFORNIA PROFILE AP700M*2ohm*MONO-BLOCK Car Amplifier*GREAT WORKING COND., 20) NEW Streetwires FSAGU20 20 Amp AGU Car Block Fuses , MASSIVE AUDIO® N4 NANO BLOCK SERIES 2000W RMS CAR MONOBLOCK AMPLIFIER MONO AMP, New MA Audio 2400 Watt Car Amplifier Mono Block Sub Amp, PYLE CAR STEREO PLDS30 TRIPLE CIRCUIT BREAKER POWER DISTRIBUTION BLOCK 40 AMP, POWER ACOUSTIK CPT1-4000D CAR MONO BLOCK MONOBLOCK CLASS-D 4000W AMPLIFIER/AMP, KICKER 10ZX750.1 CAR MONO BLOCK MONOBLOCK CLASS-D 750W AMPLIFIER/AMP 10 ZX750.1, SONY XM-1S XPLOD CAR MONO BLOCK MONOBLOCK SLIM CLASS-D 900W POWER AMPLIFIER/AMP, Kole Audio TRAX1-4000D 4000w Mono block Car Amplifier, Orion Cobalt CO8001 Mono Block Bass Car Amplifier 800 watts for Subwoofer Boxes, CAR MONO 500W AMPLIFIER +2YR WARNTY NEW 1-CHANNEL AMP CLASS AB MOSFET R 500.1 , CAR MONO 1500W AMPLIFIER +2YR WARNTY NEW MOSFET 1-CHANNEL AMP JC POWER R 1500.1, CAR MONO 750W AMPLIFIER +2YR WARNTY NEW MOSFET 1-CHANNEL AMP JC POWER R750.1 , NEW AMERICAN BASS PH2500MD 2500W CLASS D MONO BLOCK CAR AMPLIFIER AMP PH-2500MD, 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, Jensen 1050 mono block car sub woofer amp. , Visonik VB112AMP 350W Mono Block Car Amplifier+Amp Kit, New MA Audio 1600 Watt Car Amplifier Mono Block Sub Amp, Legacy New LA1400 Slim 2000Watt Mono Block Car Audio Subwoofer Amp Amplifier, CERWIN VEGA HED1000.1 CAR AUDIO MONOBLOCK MONO BLOCK 1000W POWER AMPLIFIER/AMP, Crunch PZA2000.1 Power Zone 2000 Watt Max Mono Block Car Amplifier+4 AWG Amp Kit,
