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"
Digital Designs - DD.
Have been around for quite a while.

Used by many TOP LEVEL SPL competitors, worldwide.

The range of subwoofers that this company make are a booming example of how subwoofers should be built.


One of the LOUDEST ever pd boomers,
"LOUD VAN MAN" uses just six of the mid range 15" subwoofers to devastating effect averaging over 156dB+
ddaudio.co.uk  -  phone: 0208 648 0770 - E-mail info@ddaudio.co.uk or click above ^^^
Brand "X" Subwoofers
JBL GT5 Subwoofers
Ascendant Audio Subwoofers
DC Sounds Subwoofers
Earthquake Subwoofers
HCCA Subwoofers
Copyright © 2011 by "Marcos H Barnes"