Creating a 2 ohm load

Discussion in 'Car Stereo Amplifiers' started by monster71, Nov 3, 2010.

  1. monster71

    monster71 Full Member

    I have two dual 4 ohm subs. I want to make a 2 ohm load since my amp is 2 ohm stable. This is what I have found but want to see if anyone here can validate I will get 2 ohms.

    Connect them in serial which would be 4 ohm + 4 ohm= 2 ohm. Connect the negative from one speaker to the positive of the other speaker. There will b 2 free wires one neg and one positive. Connect them to the correct neg and pos on the amp and I will now have a 2 ohm load at the amp.

    If this is not right then how can I do it without buying new equipment?
     
  2. ericj

    ericj Full Member

    You can only wire those subs together for a 1 or 4 ohm configuration.

    You could wire one sub in parallel for a 2ohm load, but then you'd have to run them each to a separate channel on your amp, but your amp would have to have 2 channels that are 2 ohm stable.


    EDIT: Wait, do you mean Dual Voice Coil, or Dual the brand?
     
    Last edited: Nov 3, 2010
  3. monster71

    monster71 Full Member

    DVCs.......
     
  4. ericj

    ericj Full Member

    Okay, if they're DVCs, then my previous post is correct. You cannot wire them together for a 2 ohm load, just a 1 or 4 ohm load.

    But, if you buy an additional sub, you could wire 3 DVC 4 ohm subs to 2.67 ohms (wire the voice coils in series and the speakers in parallel).
     
    Last edited: Nov 3, 2010
  5. Willy D

    Willy D Full Member

    What amp are you using?

    If it is a mono sub amp rated at 2 ohm that is one thing but if it is a stereo amp rated at 2 ohms that will be 2 ohms in stereo. Rarely will you find a stereo amp that is stable to 2 ohms when you bridge it. If it is a stereo amp it is most likely rated for 4 ohm bridged or 2 ohm stereo. With your subs you could run it either way.

    4 ohm mono: Wire each subs voice coils in series. VC#1 run a wire from the neg terminal to the pos terminal of VC#2 then hook the amp pos to #1 VC pos and amp negative to #2 VC neg. This turns that sub into an 8 ohm load. Do the other sub the same way and then connect the pos wire on each speaker to amp pos and the neg to amp negative (paralleling to the amp= 4 ohm)

    2 ohm stereo: Hook amp pos channel 1 to sub 1 VC1 pos and sub 1 VC2 pos then the negatives to the neg channel 1....Connect the amp channel 2 to the other sub the same way...
     
  6. pedro quiroga

    pedro quiroga Well-Known Member

    your other options are....

    go to one sub.

    sell your amp and buy a 1 ohm stable amp.

    tough break.
     
  7. monster71

    monster71 Full Member

    Thanks guys. Guess its gonna be a new amp then. My amp is a mono. I have one sub connected right now at 2 ohms. U would swear I have 2 10s in the car. I wanted more bass so I got another 10 in sub. I like my amp MTX Thunder 500 d but at 4 ohms that will only give 125 w rms per sub ( a bit more as the birth cert says 446 watts at 4 ohms at 14.4 v). Im thinking about this amp and running it at 1 ohm What do you think?
    http://www.woofersetc.com/p7748/DTR1900D--Soundstream-Monoblock-900-Watt-ClassD-Series-Amplifier.htm
     
    Last edited: Nov 4, 2010
  8. TheViking

    TheViking Well-Known Member

    for now, if ya want too... to get ya by......

    i would go ahead and run the amp 4 ohm mono on both of them. No, the amp will not put out as much power, BUT, the dampning factor will increase a bit and with the doubling of the cone area, you will probably notice a slight increase in lower frequency extension and better musical qualities of the sub bass region...

    then later get another amp....just my 3 cents
     
  9. monster71

    monster71 Full Member

    Yup. Thats the final blow. When The Viking speaks monster71 listens. Thanks man. Seriously. Im gonna do that and look at a different amp.
     
  10. Willy D

    Willy D Full Member

    So Viking....Are you saying to connect one VC from each sub (basically hooking up two 4 ohm subs) paralleled to the amp to give a 2 ohm load?

    Willy
     
  11. ericj

    ericj Full Member

  12. TheViking

    TheViking Well-Known Member

    correct ericj, option 2 in the link you provided....
     
  13. pedro quiroga

    pedro quiroga Well-Known Member

    no. you can wire two d4 subs to yeild either 16, 4. or a 1 ohm load.
     
  14. monster71

    monster71 Full Member

    I got them hooked up this morning. Running them at 4 ohm off my mono amp. God damn. Surprised the hell out of me. Like instant double the bass. You were right on Viking. And at 4 ohm my amp will run cooler. Ima keep it until it stops working and then replace it. Thanks for everyones help. I will post a pic once I get them off my phone.