Taken from the CSS website..
Linear Distortion
The first and most prevalent type of distortion is linear distortion. Linear distortion is distortion in the frequency response. When we perform a sinewave sweep from 20 Hz to 20 kHz, the input signal is actually providing the same driver level at all frequencies in the sweep. This means that in an ideal world, the speaker would output a flat line from 20 Hz to 20 kHz, or in effect, it would reproduce the input signal exactly. However, in the real world this doesn’t happen for a variety of reasons, especially when we look at individual drivers. Deviations from the ideal flat line are considered linear distortion. This article isn’t going to focus on the argument of whether or not flat frequency response is best. That is outside the scope today, but what is definitive is that the more a speaker deviates from the ideal straight line response, the more linear distortion it has.
Linear Distortion
The first and most prevalent type of distortion is linear distortion. Linear distortion is distortion in the frequency response. When we perform a sinewave sweep from 20 Hz to 20 kHz, the input signal is actually providing the same driver level at all frequencies in the sweep. This means that in an ideal world, the speaker would output a flat line from 20 Hz to 20 kHz, or in effect, it would reproduce the input signal exactly. However, in the real world this doesn’t happen for a variety of reasons, especially when we look at individual drivers. Deviations from the ideal flat line are considered linear distortion. This article isn’t going to focus on the argument of whether or not flat frequency response is best. That is outside the scope today, but what is definitive is that the more a speaker deviates from the ideal straight line response, the more linear distortion it has.
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Member
Joined 2003
That driver must nearly be an antique by now 
Nice flat frequency response with a super mild breakup, many drivers only dream of this sort of linear performance. Classic coated paper for the win
Non linear performance actually similar to the Eton, but still much nicer due to the flat response.
Nice flat frequency response with a super mild breakup, many drivers only dream of this sort of linear performance. Classic coated paper for the win
Non linear performance actually similar to the Eton, but still much nicer due to the flat response.
Member
Joined 2003
I used to be in the "measurements say it all" camp but it obviously doesn't. They're good to get a general feel for the driver, working range and so on but you need to listen to it to know if it's good (to you) or not.
If you are asking which of the two speakers sounds better personally for me, my answer is no one. It's not compare like apples to apples, because the descripience in their sizes - 34cm2 vs 58cm2. The PL11MH sounds a little bigger, the 3-212 is more spacious. The both have a pleasant a warm sound signature.
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The latest technology paper 4" from "Vifa" Tymphany would be an interesting one to compare it to..
Peerless by Tymphany NE123W - 4" Woofer
The FS says 156hz, but the graph says 68hz
Peerless by Tymphany NE123W - 4" Woofer
The FS says 156hz, but the graph says 68hz
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