SPL Testing @ Ultra Low Frequencies                  Testing your car audio system  at its Peak SPL and at four set frequencies of  40Hz   33Hz   25Hz   20Hz  ////////////   The pd SPL format started booming in the U.K. in 2008.  Created by Marcos H Barnes A.K.A. Mega Heavy Bass. A former SPL competitor.//////////  dB readings are taken from the vehicles Head Rest    The doors and windows are allowed to be opened.   Like to know more?       ...Then please feel free to browse this site.       Thank You For Your Interest.           Copyright © 2011 by "Marcos H Barnes"
Copyright © 2012 by "Marcos H Barnes" 
The Next U.K. (((pd))) Event is...
(((pd))) SEASON OPENER - @ Pure-Carma, Arena Essex - RM19  1AE
Starts at 6pm Till 10.30pm.
SPL Testing £10.00 per system.
  Trophy Event
propper droppers started here
propper droppers Booming in Europe
Saturday 5th May 2012