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"
The flagship model from ORION
They are big, heavy in ya face subwoofers.

Have proven to be one of the VERY BEST for Low Frequency Streetbass.

Orion also feature prominently in pd`s LOUDEST SPL leagues.

Richard VX Incar is first to hit 150.0dB in the Boot Boomers class using 4x 12" HCCAs.

"ICEMAN" Ian Pinder is first to Average over 155dB with 6x 15" HCCAs
Brand "X" Subwoofers
Digital Designs Subwoofers
JBL GT5 Subwoofers
Ascendant Audio Subwoofers
DC Sounds Subwoofers
Earthquake Subwoofers
Copyright © 2011 by "Marcos H Barnes"