The D‘Appolito arrangement in the midtones of the PLATINUM PLUS seven and PLATINUM PLUS nine ensure maximum dynamics and low cut-off frequencies with gentle filters for an optimized phase response. The 2x 210mm quadral ALTIMA® woofers of the PLATINUM+ nine also provide an abyss, powerful bass. Quality as Standard: As standard, all PLATINUM PLUS floor standing loudspeakers feature stable adjustable spike feet with removable silicone protection for scratch-resistant floors. The equipment also includes chrome-plated high-end terminals with high-quality screw terminals and switches for high-frequency adjustment.