Larry’s well-regarded system in his 2014 BMW M4 utilizes (4) A.R.T. X-series mats.
(1) 1Xs (5 x 8″ Silver Underside) – Treating the ARC PS8 processor.
(1) 1Xs (5 x 8″ White Underside)  –  Treating the Zapco 4-channel amplifier that runs the AE 15 inch sub and Morel SW9 8.75 inch midbass drivers.
(1) 2X (8 x 10″ Red Underside w/Carbon Fiber Finish) – Treating the Audiowave Class-A amplifier that runs the Accuton 4 inch midranges
(1) 2X (8 x 10″ Red Underside w/Carbon Fiber Finish) – Treating the Audiowave Class-A amplifier that runs the Accuton tweeters.

“10 minutes after installing the A.R.T. audio mats on my amplifiers and processors,  I could easily notice the elimination of power supply noise. These mats substantially lowered the noise floor, allowing MUCH more detail to come from a noticeably quieter, deeper-black background.  No matter how good installation and isolation is, this is one tweak that really works. I highly recommend A.R.T. technology which transformed my system from very good to great. These mats are amazing!” – Larry Chijnar