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Wiring up 2 Ohm Subs

 
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Old 31 May 2011, 03:45 pm
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Default Wiring up 2 Ohm Subs

Hey guys,

Quick question: I am installing a friends MTX Terminator two 12" subwoofers with an arctic amp. The output of the Terminators (they came like this) is one terminal at the back of the box that says 2O. Currently, I have it set up where the positive cable is on the first channel and the negative is on the second channel. The amp says it is bridgeable. Am I okay to keep it wired like this, or should it be changed?

Thanks!
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Old 31 May 2011, 05:37 pm
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Default Re: Wiring up 2 Ohm Subs

We need model numbers
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Old 31 May 2011, 06:04 pm
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Default Re: Wiring up 2 Ohm Subs

Sure it doesnt say 2Ω ? lol Just kidding

I agree with chigger, model #'s for the amp would be good.
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Old 31 May 2011, 07:59 pm
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Default Re: Wiring up 2 Ohm Subs

Hey guys,

Thanks for your help!

The amp is a Pyramid Arctic PB717X: Amazon.com: Pyramid PB717X 1,000-Watt 2-Channel Bridgeable Amplifier: Electronics

The subwoofers are the MTX Terminator TNE2120 model number: Amazon.com: MTX Audio Terminator Series TNE212D 1200 Watt Dual 12" Sub Enclosure: Electronics
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Old 31 May 2011, 08:57 pm
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Default Re: Wiring up 2 Ohm Subs







Amazon.com: Pyramid PB717X 1,000-Watt 2-Channel Bridgeable Amplifier: Electronics

Specs:

Bridgeable
Delivers two channels or bridge mono for subwoofers. The PB171X cranks out 2 x 50 watts RMS at 4 ohms and is 2-ohm stereo stable for 75 watts x 2.



--

It says 2 ohms because it's 2 ohm stable.

The amp only puts out 75 RMS watts per subwoofer (x2)

Those Watts are not CEA certified; so it's likely less. Even if it was 75 watts, that is VERY low for a subwoofer.



----

subwoofers:

MTX Terminator TNE212D Dual 12" Sealed Subwoofer Enclosure | shop.mtx.com

Part Number: TNE212D
Description: Dual 12", Terminator Sealed Enclosure w/Amplifier
Frequency Response +/- 3dB: 37Hz - 150Hz
Depth: 11.125" (28.26 cm)
Impedance: 2O
RMS Power (Watts): 400
Recommended Amp Power (RMS): 200 - 400


***The Subwoofers are OK. 400 RMS is decent per subwoofer.

However, the amp claiming to putting out 50-75 RMS (not CEA certified, so it's probably lower)

The amp is not a good match for the subwoofer. It's grossly underpowered. That can damage your subwoofer.

--

*I am not putting you down, just evaluating your equipment in an honest way based on the manufactures specs.

If I were you, I would get some decent equipment if you enjoy Bass. Value how much you like bass.


---

To start, I would start with a new amp. You want your amp to be slightly more powerful than your subwoofers; so you don't abuse your amp. Keep the gains turned down to increase lifetime of the amp while providing the proper RMS watts to the subwoofers.


The Subwoofers you have now; the MTX entry line, are OK. You can stick with them; but consider getting the proper amp for them.
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Old 31 May 2011, 09:01 pm
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Default Re: Wiring up 2 Ohm Subs

Thanks for your help SergeantPTCruiser. It's not my setup, and the person using them won't be using them at full power and isn't particularly concerned with sound quality.

Is the way I have them wired, as shown in the picture that you displayed, safe to use? (I copied the picture below for reference.)

Thanks again for all of your help!


Last edited by paulrosenthal; 31 May 2011 at 09:11 pm.
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Old 31 May 2011, 09:14 pm
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Default Re: Wiring up 2 Ohm Subs

The amp also has a lot of very bad reviews.

Amazon.com: Customer Reviews: Pyramid PB717X 1,000-Watt 2-Channel Bridgeable Amplifier


It's crazy how it says 1,000 watts, but really is 100-150 RMS
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Old 31 May 2011, 09:22 pm
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Default Re: Wiring up 2 Ohm Subs

Quote:
Originally Posted by paulrosenthal View Post
Thanks for your help SergeantPTCruiser. It's not my setup, and the person using them won't be using them at full power and isn't particularly concerned with sound quality.

Is the way I have them wired, as shown in the picture that you displayed, safe to use? (I copied the picture below for reference.)

Thanks again for all of your help!

lol, don't worry bro; it's not my copy write picture, even if it was, I wouldn't care.


Ok. You asked about the 2 ohms.

Check it out. you gotta check how your subwoofers are wired.

I believe those are Single Voice Coils or SVC

Check this for reference, and maybe bookmark it.


Subwoofer Wiring Diagrams



And if you have it hooked up 1 positive on the left terminal, and 1 negative on the other terminal, that is Correct if the sub woofers are wired together.

The 2 channel amp is usually 1 terminal per speaker; unless the speakers themselves are wired together. If they are wired together; then the way you have the wires in the Amp is Correct

peace!!!



Last edited by SergeantPtCruiser; 31 May 2011 at 09:24 pm.
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Old 31 May 2011, 09:32 pm
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Default Re: Wiring up 2 Ohm Subs

I am not sure how these subs are wired inside the box. My friend says they came in the box like that. On the back of the box, there is one set of terminals that says 2 Ohms.
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Old 31 May 2011, 09:50 pm
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Default Re: Wiring up 2 Ohm Subs

Yeh, Pyramid isnt the greatest, I'd stay away. Sonic Electronix has a lot of good equipment cheap. That's where I got my amp.
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