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Corsa Sport » Message Board » Help Zone, Modification and ICE Advice » **WHATS THE DIFFERENCE BETWEEN 2 OHM AND 4 OHM**???? » Post Reply
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Palwing |
posted on 12th Mar 03 at 17:29 |
To achieve maximum power transfer, the output impedance of the supply device (ie Amp) should match the input impedance of the receiving device (ie Speaker) So if the o/p impedance of your amp is 2 ohms then the device you match to it should also be 2 ohms to get max power. Same for 4 ohms or 8 ohms etc etc... ONC electronics! In the old days, if you put too low an impedance speaker on your amp you ended up blowing the output/driver transistors of your amp. Nowadays, modern amps have built in safety circuits to help stop that happening. If you put 2 speakers in series then you double the resistance. So 2 x 2 ohm speakers = 4 ohms. If you connect them in parallel then the resistance is worked out as follows. Remember, parallel resistance is NOT the same as averaging. It uses the formula Resistance Total = 1 / ((1 / R1) + (1 / R2) + (1 / R3)) etc. So Total resistance for 2 x 2 ohm speakers connected in parallel = 1/ (1/2 + 1/2), therefore 1 ohm! | |
dig dave2811 |
posted on 10th Mar 03 at 18:06 |
well its not that hard gets a bit more complicated when u start calculating the impedence of capacitors etc. u dont really need to know everything anyway just which way to connect them up | |
corb |
posted on 10th Mar 03 at 17:17 |
didnt do physics a level, i understand it. :P | |
dig dave2811 |
posted on 10th Mar 03 at 16:51 |
impedence is the oposition offered to current by components. in this case the components are the amps and speakers. When u connent the components, u can either connect them im series or parallel. depedning on which way u connect them ,depend on the impedence u end up withe. thats why some subs come with dual voice coil so that u can connect them in parallel and get a lower impedence and therefor more power. | |
d0gz_bollox |
posted on 10th Mar 03 at 16:40 |
Some amps allow you to use two channels for your 6x9 AND bridge a sub on these two channels. obviously you'll need some inline filters. | |
Matt Ings |
posted on 10th Mar 03 at 16:22 |
you lower the impedence when you bridge channes on your amp | |
dig dave2811 |
posted on 10th Mar 03 at 15:59 |
U NEED EITHER 1 4 CHANEL AMP OR IF U WANT MORE POWER USE 2 | |
d0gz_bollox |
posted on 10th Mar 03 at 15:42 |
How many channels? | |
corsa_pro |
posted on 10th Mar 03 at 15:30 |
im lost someone explain! which is best then to run a 12" vibe sub, its 700 max, 300 RMS but need to run some 6x9's off as well | |
dig dave2811 |
posted on 10th Mar 03 at 15:29 |
2 OHM AND 4 OHM is the impedence. | |
corsa_pro |
posted on 10th Mar 03 at 15:26 |
whats the difference between running an amp in 2ohm or 4ohm? | |
cobra148 |
posted on 10th Mar 03 at 15:15 |
Difference as in what?? | |
corsa_pro |
posted on 10th Mar 03 at 15:13 |
very funny! but really what is the difference? | |
Brett |
posted on 10th Mar 03 at 14:15 |
haha | |
d0gz_bollox |
posted on 10th Mar 03 at 14:05 |
quality reply. I cant believe I didnt think of that. ha ha | |
widget |
posted on 10th Mar 03 at 14:05 |
2 ohms | |
corsa_pro |
posted on 10th Mar 03 at 13:32 |
AS ABOVE? |