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how can i get my lanzar opti 50c at 1/2 ohm using 6 4ohm subs i nedd this monster to put out all available power it usualy takes 8 4ohm subs to doso, when 8 4ohm subs are aplied it will pet out around 1100 wats can ya help
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Posts: 1314 | From: wayland,ny 14572 United States of America | Registered: Mar 2000
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sorry guys and gals, my email adress has changed to jcartunes@aol.com i dont know how to change it on the forum anyone know how to please let me know
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Posts: 1314 | From: wayland,ny 14572 United States of America | Registered: Mar 2000
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posted
If you go to profile under the post new topic you can change the email that is shown.
To your question, you really can't. You can have .75 ohm with those speakers but nothing less than that. You could use some of the transformer products but they get real expensive when high power is needed and I feel the drawbacks are much greater than the benefits. With six subs you have a bunch of wiring options but the don't seem to work as good as you want with that particular amp.
posted
Ok I really have no clue about this product but there is a RF punch transformer RP7312 punchmatch inpedance transformer which lets you dial the ohms you want to into the amp now I don't know if it works with all amps but it sounds like a start for you ......
------------------ Be Ready the Bass Station Hits Db this Spring powered by RF JL KENWOOD
Posts: 81 | From: Central NY | Registered: Apr 2000
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well its a lanzar opti 50c its 1/2 ohm stable it requires 8 4ohm subs to do so , well to make a long story short i cant fit 8 subs to day. in a couple weeks or so yes right know im dealing with 6 subs . ok . now the problem is with only 6 subs im putting out around 400 watts or so with 8 800- 1100 watts see my point spl, what can i do by tomarrow at 1030 in the morn.
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Posts: 1314 | From: wayland,ny 14572 United States of America | Registered: Mar 2000
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With all 6 subs in parallel you get 0.75 ohms which should give you more than 400 watts total. But there isn't much you can do until you get two more subs, unless you want to get different subs.
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jc2 hey man youll have to eplaine how you came about that # , the way i figure ohms law is this ohms/# of subs = resistance in other words 6 4ohm subs is = to 0.66666666, 8 subs is = to 0.5 wich is whare i need to be but i cant fit all the subs in my truck , wich consiquently only gives me around 400 watts out of a 1100+ amp any other suggestions would be a great jeff
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Posts: 1314 | From: wayland,ny 14572 United States of America | Registered: Mar 2000
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You're right, I don't know where I got 0.75 ohms. But you are going to have to explain where you get 400 watts at that load. Because if you have an amp that does 1100 at 1/2 ohm that amp should do 824 watts at 0.667 ohms according to my calculations.
Now you can’t do anything about that. You will have 825 W (if you think, that 50C is 1100 @ 1/2 Ohm). The only significant gain you can get is because of more cone area. And even that is small, because you can get only 33% increase. Sometimes is easier to stay with clean design, than to try to put too many subs into the car.
Subs are just called 4 Ohm. Their actual resistance is usually different (lower), and resistance in the box is also different. Try to find that with good box building program.
Try to improve power supply. This can also give you some dB’s. Don’t loose time on what you can’t do.
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Posts: 1820 | From: Ljubljana, Slovenia | Registered: Jan 2000
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thanks guys i appreciate all the help.dr.loudness i am ta king your advise and staying with 6 subs in my ranger, JC2how do ya figure resistance? thw actual rating on the amp from the factory is 800+ but it was tested at 12v and 14.6 did over 1000 . so for the sake of playing it safe can you show me how to figure resistance at 12v 6 4ohm subs and 800 watts at 1/2 ohm. thanks jeff
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Posts: 1314 | From: wayland,ny 14572 United States of America | Registered: Mar 2000
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oh , i almost forgot to ask you guys about this one, radioshack makes a 8ohm non-inductive resistor, will this work ? what does non- inductive mean . in all reality i bought two wired them up and it dropped the load to 1/2 ohm, but a friend of mine seid it wouldnt work cause of what a resistor actualy does can anyone hear shed som light thanks jeff
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Posts: 1314 | From: wayland,ny 14572 United States of America | Registered: Mar 2000
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posted
Using a resistor to decrease your impedance won't help you any. The amp may produce more power but the extra power will go towards heating the resistors up so you will gain nothing. The way you figured the resistance is the right way, I am normally pretty reliable on technical issues, I just dropped the ball on that one. The way to figure your power is to use V^2/R in this case we can use 1100 watts at 1/2 ohm V^2 = 550 so V = 23.4 so at .666 ohms your power is (23.4)^2/0.667 = 825 Your amp has an unregulated power supply so the voltage you have the more power you get. At 12 volts you will get about 600 watts at 0.667 ohm
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