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Can someone explain group delay and phase response to me?

 

Silver Member
Username: Slimdog53185

Bowling Green, Kentucky U.S.

Post Number: 138
Registered: May-07
I see the graphs on bassbox. I just really want to know how they effect the sound of a sub and how I can effect them with the build if I can.
 

Platinum Member
Username: Glasswolf

Post Number: 13780
Registered: Dec-03
http://www.linkwitzlab.com/frontiers.htm#F

http://www.trueaudio.com/post_010.htm

http://www.trueaudio.com/win_rc.htm

"Group Delay Response

The time delay experienced by the audio signal between the speaker's electrical input terminals and the acoustic output is known as the group delay. What does this mean? Well, if the group delay is large enough, it will be audible. The audible threshold for group delay is about 30 milliseconds, although lower is desirable. WinSpeakerz calculates group delay to let you know if your design is within the desired range See Figure 4 for the Titanic system group delay (blue plot). As you can see, our example has a maximum group delay at 23 Hz of 9.2 milliseconds.

Phase Response

The difference in phase between the input of the speaker and the speaker's output is known as the phase response of the system. The phase response of a system should produce a smooth curve with not much in the way of large humps. This would indicate that the group delay is large, approaching the audible limit. Again for our example, the response is smooth, as would be expected by the system's low group delay (Figure 4, purple line)."

http://www.diyaudio.com/forums/multi-way/14274-audibility-group-delay.html#post5 28926
 

Silver Member
Username: Slimdog53185

Bowling Green, Kentucky U.S.

Post Number: 139
Registered: May-07
So is there any way I can reduce these in my builds or do I even need to worry about it.
 

Platinum Member
Username: Glasswolf

Post Number: 13791
Registered: Dec-03
in a car I really wouldn't worry about it to be honest.
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