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"
Brand "X" Audio Subwoofers are a new and very welcome addition to the Bass scene.

Designed by a Serious U.K. BASS HEAD
KEIRAN - A.K.A. Bass Nazi.

Quality Built in the U.S.A. by Pierce Audio.

These subs are built to take silly abuse.
From the Entry Level DOUBLE series up to the Mighty BMF which will happily laugh at anything less than 5k.

Large excursion capabilities coupled with strong motor force throughout the range.
The "Double" as used by Marcos A.K.A.
Mega Heavy Bass has nearly 3" of cone movement!!
Brand "X" Audio is made to order. To find out more please click on the Title above ^^^
Digital Designs Subwoofers
JBL GT5 Subwoofers
Ascendant Audio Subwoofers
DC Sounds Subwoofers
Earthquake Subwoofers
HCCA Subwoofers
Copyright © 2011 by "Marcos H Barnes"