Paul's Posts

More from Paul

1. Aerospace in Sea CliffThe first commercial use of a servo woofer in a stereo system was in 1968. The Infinity ServoStatik One. I graduated high school in 1966, two...October 8, 2014
2. AccelerometersI mentioned in yesterday's post motional feedback for woofers, sometimes known as servo systems. The idea behind them is simple, their execution not so much. Woofers...October 7, 2014
3. FeedbackIt's a case of inertia, plain and simple. A woofer cone with a lot of mass takes its sweet time getting started and stopping. And here's...October 6, 2014
4. Stop and goOne of the challenges any woofer has, in particular subwoofers, is stopping and starting with any degree of accuracy. The mass of the cone on these...October 5, 2014
5. Breaking up is hard to do... as Neil Sedaka wrote, "breaking up is hard to do". He must not have had woofers in mind because that's apparently something that happens easily,...October 4, 2014
6. Paper foldingI mentioned yesterday the power of music is typically below 1kHz if we're talking about an orchestra. Of course a trumpet, a flute, a voice would...October 3, 2014
7. Bow wowWoofers. Bass drivers. Big cones. All used to produce about 70% of our music's content in terms of quantity. If you look at an amplitude spectrum...October 2, 2014
8. Bashing ampsYesterday's post I mentioned there are multiple types of amplifier topologies used for subwoofers, the majority of modern ones Class D amps. I also mentioned another...October 1, 2014
9. Sub ampsWe've covered much about the crossover workings of a subwoofer in these posts. We will cover more, such as phase, when we get to the setup...September 30, 2014
10. OverlapLet's get back to our basic subwoofer crossover today. The purpose of the built in crossover is to make sure the subwoofer doesn't play music higher...September 29, 2014
11. Whoa, skippy!My, my, there's a lot of opinions out there. Thank goodness for that! I suppose a few hornets have been riled up by my comment of...September 28, 2014
12. Crossing the lineIn our continuing series on subwoofers I've chosen to break the sub down into four primary sections: crossover, woofer, power amplifier and enclosure. Today let's start...September 27, 2014
13. Dissecting the subLet's accept, for purposes of this discussion on subs, that you need one in your room (if you don't already have one). Let's also agree that...September 26, 2014