(upbeat music) - Hey guys, this is Brendan
with Sonic Electronix, and today we're going to
be showing you how to wire one dual two ohm sub, in parallel, to equal a one ohm final impedance. Here we have our NVX dual
two ohm NSW subwoofer. Now one way to verify that
it is a dual voice coil is by looking at the basket here, we see two sets of terminals. You can test the impedance of each coil prior to wiring the woofer, just to verify that you did
get the correct impedance. And in order to do so, we need our meter here, put our meter setting on the ohm, or resistance, and we're gonna take our test leads and just measure one coil to
verify that it is two ohms. It does not matter which
lead goes in which terminal, all we're doing is reading
the resistance value. As you can see here, we have a final impedance
of a two ohm load. Now it may fluctuate between, as you can see here, you might be 0.1 or 0.2 off, it's okay, as long as it stays steady, you know you have a
final two ohm impedance. Now make sure the woofer is facing up, because if we do touch the cone, you'll notice that the
impedance fluctuates, it makes the meter go crazy. So now we're ready to wire up our woofer. In order to wire a woofer in parallel, we need two jumper leads, one for positive and one for negative, as you see here. Today I'll be using blue as positive and gray as negative. And to start, we're going to start with negative, to voice coil number one. Branch that jumper lead right over here to voice coil number two. Our second jumper lead, which is positive, goes to voice coil number one positive, and we'll bring that around as well. Now this set of wires
as you see right here is actually going to be
going to our box terminal on the inside of your enclosure, from the box terminal to
your amplifier outputs, which will actually see the
impedance of the woofer. So what we're gonna do is actually join up the positive with the positive, and negative with negative, attach that to our secondary voice coil. Now we're ready to double check our work and read the final impedance. We should now have a
resting impedance of one ohm since we wired this woofer in parallel. We're going to attach our test leads here to our meter, and you'll notice now we have a 1.1, or a 1.0 ohm load. Now it may fluctuate between 0.1 to 0.2, don't worry, just round off, and that's gonna let you
know your final impedance. So once again, this is how we're gonna wire a dual two ohm woofer in parallel to equal a one ohm final impedance. I'm Brendan with Sonic Electronix, your source for everything car audio.