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Author **WHATS THE DIFFERENCE BETWEEN 2 OHM AND 4 OHM**????
corsa_pro
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Registered: 7th Sep 02
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10th Mar 03 at 13:32   View User's Profile U2U Member Reply With Quote
AS ABOVE?

ANYONE KNOW?
widget
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Registered: 17th Feb 03
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10th Mar 03 at 14:05   View User's Profile U2U Member Reply With Quote
2 ohms
d0gz_bollox
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Registered: 8th Apr 02
Location: Walsall
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10th Mar 03 at 14:05   View User's Profile U2U Member Reply With Quote
quality reply. I cant believe I didnt think of that. ha ha
Brett
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Registered: 16th Dec 02
Location: Manchester
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10th Mar 03 at 14:15   View Garage View User's Profile U2U Member Reply With Quote
haha
corsa_pro
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10th Mar 03 at 15:13   View User's Profile U2U Member Reply With Quote
very funny! but really what is the difference?
cobra148
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Registered: 27th Oct 01
Location: Here in front of my monitor.....
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10th Mar 03 at 15:15   View User's Profile U2U Member Reply With Quote
Difference as in what??
corsa_pro
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10th Mar 03 at 15:26   View User's Profile U2U Member Reply With Quote
whats the difference between running an amp in 2ohm or 4ohm?
dig dave2811
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Registered: 6th Jan 03
Location: newport sout wales WCM
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10th Mar 03 at 15:29   View User's Profile U2U Member Reply With Quote
2 OHM AND 4 OHM is the impedence.
the lower the impedence the less resistance to current flow and hence more power
corsa_pro
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10th Mar 03 at 15:30   View User's Profile U2U Member Reply With Quote
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
d0gz_bollox
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10th Mar 03 at 15:42   View User's Profile U2U Member Reply With Quote
How many channels?
dig dave2811
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Registered: 6th Jan 03
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10th Mar 03 at 15:59   View User's Profile U2U Member Reply With Quote
U NEED EITHER 1 4 CHANEL AMP OR IF U WANT MORE POWER USE 2
Matt Ings
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Registered: 26th Feb 01
Location: Cardiff/Sheffield
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10th Mar 03 at 16:22   View User's Profile U2U Member Reply With Quote
you lower the impedence when you bridge channes on your amp
d0gz_bollox
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10th Mar 03 at 16:40   View User's Profile U2U Member Reply With Quote
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.
dig dave2811
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Registered: 6th Jan 03
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10th Mar 03 at 16:51   View User's Profile U2U Member Reply With Quote
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.
its a little complicated to understand unless u do physics a level (like me), but i still find it complicated lol
hope this makes some sence
corb
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Registered: 24th Apr 02
Location: Calgary, Alberta, Canada
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10th Mar 03 at 17:17   View User's Profile U2U Member Reply With Quote
didnt do physics a level, i understand it.
dig dave2811
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Registered: 6th Jan 03
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10th Mar 03 at 18:06   View User's Profile U2U Member Reply With Quote
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
Palwing
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Registered: 12th Mar 03
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12th Mar 03 at 17:29   View User's Profile U2U Member Reply With Quote
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!

(Just to confuse things even more…in electronics, resistance is NOT exactly the same thing as impedance…but don’t worry too much about that!)

Hope this all helps?

Here's a good link to help work out parallel resistances:

http://www.raltron.com/cust/tools/parallel_resistance.asp

Pal

 
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