Hey, it's Vince with AudioXpert here again. Today we're going to talk about base. How do we create base? How do we get base into your car? We design and build our own subwoofers here so we really understand the science behind this. So we're going to talk mainly today about power and about enclosures. Mainly the enclosure, how important that is for us to get output, which is what everybody wants. So I'm going to start with turning on our dedicated subwoofer amplifier in our display. Our audio XDI650.1. So at a one-on-load, that puppy makes about 650 watts. So right now we have a two-on-load on this board. So we're going to get a decent amount of power for demonstration purposes. We have today also our RTA on display with turned in the SPL mode. So we can actually measure with a number the SPL that this base is going to create for you right now. The first thing we're going to play is a base track from base operator. It's got peaks at 30, 40 and 50 cycles, which are low to mid base frequencies. We're going to play them first through a sealed enclosure. We're going to be using our entry level LJ12-inch subwoofer. These guys are rated about 300 watts RMS, 600 watts peak. It's our entry level driver. About 169 is the price for these guys. So first we have a B-box standard 3-quarter cubic foot sealed enclosure, which is about a $50 box. After I switch that on, we're going to measure SPL. We're going to see it around the 103 to 105 range. Then I'm going to come back over here and I'm going to switch on our high output subwoofer enclosure. We build and design here. It's got the same exact woofer in it. Then we'll go right back over to the SPL meter and you should notice a 10 to 13 dB increase. This is all free base. I'm not going to touch the amplifier. I'm not going to touch the volume on the radio. We're just going to switch woofers back here. When I first turn on the sealed enclosure, I'm going to go to about 25 on the volume and you're going to notice at the speaker. You may not be able to hear it through this video, but at that point, in this type of enclosure, the speaker starts to make mechanical noise because it's reaching its mechanical limit. It's not the speaker's fault. It's not the amplifier's fault. It's just that any speaker in this environment is going to experience mechanical failure or stretching of the mechanical limit of the driver. It's just the nature of a sealed enclosure. It's not very good at helping the speaker create output and create base. I'm going to stop talking right now. We're going to start playing. All right? Okay. Also, I'm going to turn off the high frequency drivers so we can just focus on base. So, man, the volume number 28, I'm still not getting a lot of output. You can come over here. You can see that the driver is actually moving. It's got a lot of physical movement up and down. I'm already starting to hear the mechanical noise that it's making because it's reaching its limit in that enclosure. So I don't want to switch right over to my high output box quite yet. I'm going to reduce the volume down to about 20. And then we're going to see where it's going to finish this sign sweep on the track. Start going into its base portion. And then we can start measuring SPL. So we're about 101, 95 to 101 is at the peak. I'm going to go over here and turn this box off. Turn on our high output enclosure. You can see we jumped all the way to 108.9, 109. And I haven't touched the volume on the radio. So there we go. 113.2, 113.8. You're going to go back to the sealed box. 103.104. So there's a 10 dB difference in output just from the enclosure. So when you're trying to create output the best way to do it, the most economical way to do it is without equipment. So the enclosure does the best job of doing that. That's our specialty here at AudioXperts. Again, we designed and built our own subwoofers. We understand the science better than anybody in the area. Do yourself a favor before you buy any kind of base system for your vehicle or you audition. Come down and listen for yourself. It's kind of hard to do this on a video because you can't hear it. So that's why we brought the SPL meter so you can see it with your eyes, the difference and volume. If you want to get in contact with us, you can email us at info at audio-xperts.com or you can call us 707-453-0488 and don't forget to like our audio-xperts back-able Facebook page. Thanks, have a great day.