Question about Ultra Linear UL-2200D Car Audio Amplifier

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CONNECTING 2 12" L7 TO US AMP MD1

OK SO WHATS THE BEST WAY TO CONNECT MY 2 12" SUBS TO MY US AMP MD1..I WANT THE SUBS TO HIT NICE AND CLEAR...

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  • blueextc3221
    blueextc3221 May 11, 2010

    what is the voicecoil configuration of the L7s?

    Dual 4 ohm, dual 2 ohm, single voicecoil??



    Let me know, and I can help you.

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  • 11 Answers

IF THE AMP IS BRIDGEABLE, THEN BRIDGE THEM. IF NOT THEN RUN THEM MONO. THE TYPE OF VEHICLE HAS ALOT TO DO WITH HOW TO HOOK THEM UP.

Posted on Feb 24, 2009

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What would cause my fossgate t1500 to shut off everytime the bass hits hard I have two t12s that it pushes


Sounds like your amp isnt powerful enough to power your subs, whats the wattage of your amp and both subs? Its shutting off when hard bass hits to protect itself from blowing, a good feature as a blown amp means a new one. an amp should always be more powerful than the speakers / subs you are connecting to it. for 2 500w subs your looking at a 1200w amp minimum.

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I have 2 12" L7's


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What settings should i have my 760 watt pioneer amp set at for amp gain and bass boost in order to have the best sounding hit from the subs?


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Good price


Hello smoot_dog,

Well, you did not specify whether you have the 2 ohm or the 4 ohm versions of the L7 and that will impact your choice of amps. But with 8 voice coils and 4 subs to work with, you certainly have lots or potential configurations.

If your subs are the 4-ohm version, I would recommend the Alpine MRP-M1000. Currently it is on sale at www.crutchfield.com for $347.00. With this amp you'd wire the voice coils in parallel (2 ohms), wire each of the 2 pair of subs in series (4 ohms), and the resulting pairs parallel to the amp for a final load of 2 ohms.

If your subs are the 2-ohm version, I would recommend the Rockford-Fosgate Punch P1000-1bd which is stable at 1 ohm. Crutchfield sells it for $349.99. With the Punch and 2-ohm voice coils, you'd series the voice coils (4 ohms), parallel each pair of subs (2 ohms), and then parallel the resulting pairs to the amp for a final load of 1 ohm.

Either of these amps will provide an honest 250 watts RMS to each L7. They'll not only rock your vehicle, they'll rock the pavement.

Apr 14, 2009 | Car Amplifiers

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Why connect a car amp in series and will this help me?


Not sure if it's what was meant by previous poster. But if you're just driving the two subs off the 4 ch, and no other speakers, your best bet is to run pairs of bridged channels, ie use the 4 ch as a more powerful 2 ch amp. Then independently run one sub on each of these paired channels.

If you bridge all 4 channels (not sure if this is an option on this amp), and then run your subs in series, you will likely lose out compared to the peak power you could be seeing with two independently paired channels.

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Kicker l7


hook them up parellel for 1ohm load

Nov 23, 2008 | Car Amplifiers

1 Answer

Amp. Audiobahn a2300hcx


If the subs are dual 4 ohm voice coils and if your amp is good down to 1 ohm, your best bet is:
  1. Connect the voice coils in parallel ("+"s together, "-"s together). This will make the impedance of each sub 2 ohms.
  2. Connect the subs in parallel.
  3. Bridge the amp to one channel.
This should max the amp out at 2400W, which means about 1200W per sub.

If your subs are single 4 ohm voice coils, do the same steps, but you'll only be able to load the amp to 2 ohms, which means about 600W per sub.

Also keep in mind that box size, type, and quality make a big difference in how subs sound.

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1 Answer

Wiring


In all reality, that amp is probably a bit small for those two subs. To maximize the power from the amp to the subs, make sure:
  • The dual voice coils of each sub are in parallel (+'s together, -'s together). This makes each sub 2 ohms.
  • Connect the subs in series (+ to -). This makes the combination of subs together 4 ohms.
  • Bridge the 2 channels of the amp to the subs in series (see above).
This will put somewhere between 150-200W to each sub.

Keep in mind, though, that depending on the music type and location in the vehicle, the type and size of the sub box is going to make almost as much difference as how much power is on the subs. Sealed boxes are usually small and have a nice flat response, but tend to need more power to sound louder. Ported and bandpass boxes are larger and aren't as flat of a response, but have nice loud peak at a certain frequency.

Let me know if you need any more help!

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