old school speakers This is a topic that many people are looking for. militaria-agent.com is a channel providing useful information about learning, life, digital marketing and online courses …. it will help you have an overview and solid multi-faceted knowledge . Today, militaria-agent.com would like to introduce to you Old School Polk Audio C4 Subwoofer – Four 6×9 Subs in Isobaric Teardrop Enclosure. Following along are instructions in the video below:
“Here s the pope see for sub woofer mounted in the back here my car car s not really mounted it just kind of just sitting here just wanted to you a size comparison. Here. This is a 12 inch rockford z. Series subwoofer just to show you the size this box here reminds me of a about an 8 inch bazooka tube.
That s kind of teardrop shaped. So it s a lot easier to mount than a bazooka tube and sounds better than an 8 inch bazooka tube to me as you can see the speaker terminals input terminals are here on the right and it has dual inputs each of the six by nine pairs are four ohms. So you have two four own connections. One forum connection one forum connection and what i ve done is i ve wired them in parallel to give me a 2 ohm load bridge to my amplifier and the way.
It s set up and i ll show you a poke technical sheet..
Now there are two six by nine s here. Facing each other on this side. There are two six by nine facing each other they are two own six bonds and they re wired in series. And they re also wired out of phase.
So what that means is they do not compete against each other they actually push and pull each other this is a fourth order bandpass system. Okay so i ll flip the polk. C4 over and you can see on the bottom. It s a piece of mdf and it has several screws that hold the bottom plate on so.
What i m going to do now is i m going to take it off and show you guys..
The interior of this subwoofer all right so here s the inside the enclosure as you can see here s the three inch by five inch in length port. Here are two of the six by nine mounted isobaric lis push pull design. This chamber is ported center chamber is sealed with the polyfill and this chamber on the left is exactly the same as one on the right. It s also ported these are in push pull design again these subs are wired.
So that they are out of phase. So when one subwoofer moves out the other one moves in so that way they re not fighting each other. And that s how isobaric design works. I m sure much do you guys know that but some of you may not and just gives you a great idea here of the design well there you have it the guts of the polk audio c4 subwoofer i ll just give you a quick pan real quick the insides and then i m going to put it back together and let you guys hear it.
See what it sounds like all right..
We re going to do the demo recording now we ll start back over with the rap chill my frank norah. I m going to crank it up see how it sounds all right here s the song i created on the ipad. We re going to do this one next and it is raining outside so we re probably gonna hear some rain in my sample here it is pretty dang impressive. I must say all right here s another one i created on the ipad.
And it s still raining outside. So you re probably going to hear that now is pushing the polk audio c. For subwoofer with approximately 300 watts of power and i must say it s very impressive not quite the output of my jl audio 12 w6v with 300 watts. But for the size and you know for the ease of installation.
It s tough to beat..
You know this is old school stuff. But uh still works really well well there you go folks a quick look at an old school polk audio c4. Subwoofer hope you guys enjoyed the demo if you did head over to old school stereo comm click on donate send me a few bucks that helps me pay for the website helps me pay for some of the products that i review for you guys not making any money. Doing this guys.
I m actually losing money every month so every little bit will help it old school stereo click on donate any amount would it be appreciated this has been big deal is old school stereo calm. We ll see you next time. I m out of here. ” .
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