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"
Loud and robust.
These are big, heavy in ya face subwoofers.

Excellent design and build quality.

Quite a few pd tested installs featured various ranges of this make of subwoofer.

Most memorable being BASSWAGONS
Berlingo van which had 8x 15" DC Level 4 subwoofers squeezed into it.

Again another new range to suit every type of bass system you may require.

Look out for more DC sounds systems entering the pd format this year...
Brand "X" Subwoofers
Digital Designs Subwoofers
JBL GT5 Subwoofers
Ascendant Audio Subwoofers
Earthquake Subwoofers
HCCA Subwoofers
Copyright © 2011 by "Marcos H Barnes" 
DC Subwoofers can be found on www.directice.co.uk or just click above ^^^
Alternatively you can contact VD (Dave) personally on www.talkaudio.co.uk