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[bharat bhushan]

hi all,
      want to build twin 15'' push pull subs ,,what are the benifits of push pull design over other designs.
pls send plans if anyone have.
                     thanks in advance

[Art Welter]

Push pull reduces distortion caused by suspension nonlinearitys.
The speakers can be oriented side by side, and offset to line up the drive point, or put in a small chamber, the cone of one facing the magnet of the other.
When put in a small chamber, the chamber causes a HF roll off, further reducing distortion.
The small chamber also reduces the exposure of the cones to weather and physical damage.
The push pull slot allows a smaller cabinet front than side by side or vertical mounting, so increased cone density and less interference can be achieved.

[bharat bhushan]

thanks Mr.Art,
does anyone has plans for this type of sub,

[Tim Padrick]

Art Welter wrote on Mon, 31 August 2009 14:16

Push pull reduces distortion caused by suspension nonlinearitys.

At the levels they are likely to be used, will a reduction in distortion from 50% to 30% really matter?