Push me pull me..

[gstokes]

How to make a crappy subwoofer sound great..

Step 1) Remove 1 subwoofer from MTX TNE212D enclosure.

Step 2) Reinstall subwoofer backwards.

Step 3) Wire the subs out of phase.

Step 4) Laugh at all the money i saved by not replacing the subs or the enclosure.

Note: In the TNE212D there is no divider wall separating the subwoofers but it is braced in the center AND the subwoofers that come with the TNE212D enclosure are not the same terminator subwoofers that they sell, the subwoofers that come with the TNE212D enclosure are ugly generic steel framed drivers that will need some cosmetic work if you want them to look halfway decent, at least the speaker wire connectors are soldered to the spade terminals..

Compound Push/Pull

From Danmarx.org..

Two drivers share an acoustic volume of air within a single enclosure, the drivers are then wired out of phase while remaining mechanically still in phase with one another, harmonic distortion is reduced in that any anomalies or variations in the two driver's spider, cone or suspension characteristics are canceled out by the other driver's inversely proportional anomalies and variations, the sound is said to be as accurate and pure as it can possibly be with each driver "correcting" the other driver.

Advantages..

Increased output and power handling.

Very high SPL capability.

Disadvantages..

Having to look at the backside of a crappy subwoofer.

Best Applications..

Where one sub just isn't enough.

High power high output applications.

The sonic advantage may make this sub more suitable for audiophile music and critical listening experiences.

Click to read more...

 

[T Reds 19]

Is there a difference between this and mounting both subs normally just out of phase the same airspace?

 

[gstokes]

Is there a difference between this and mounting both subs normally just out of phase the same airspace?

Absolutely..

 

[mlstrass 5,000+ posts]

Meh...OP have you actually tried this? I like the "very high SPL capability" statement as I've never seen a loud vehicle run a set up like this...

 

[gstokes]

Meh...OP have you actually tried this? I like the "very high SPL capability" statement as I've never seen a loud vehicle run a set up like this...

Yes, last night i modified the enclosure for compound push/pull but won't get a chance to hear it until the CDT CL-5 midrange speakers arrive the 25th..

The door panels are off and everythings a mess but give me a few days and i will give full review.

It's a last ditch effort to improve low frequency response before i replace the subs and/or the enclosure, it may work and it may not but it's free to try..

 

[macsdad 10+ year member]

That's why we call it trial and error, like I told you, research is what most of us enjoy about this stuff. At least, that's how I feel about it.

 

[big scott]

I wander if I could get more output from my 1 sub if I flip it to the out side of my box?

 

[winkychevelle 10+ year member]

This is the same basic thing as isobaric. Extra output would be the same as making a regular sized sealed box for 2 subs rather than shoving 2 in a box sized for 1. You get increased linearity due to having double the suspension controling the cones. But at the cost of efficiency since you now need more power to achieve the same as a proper dual sub sealed box.