The Celestion TF1230S is a tough 12inch pro audio loudspeaker with Kevlar loaded cone, robust steel chassis and optimised ferrite magnet assembly delivering an impressive power to weight ratio. With its 3inch high temperature edge-wound copper clad aluminium voice coil wound on a glass fibre former for enhanced reliability and double roll surround providing exceptional linearity at extremes of cone excursion. The TF1230S is the official replacement woofer for the Mackie SRM 450 (V2/V3).