Rockford Fosgate P1-S4-12 12" 4-Ohm SVC Subwoofer Marine Audio The C 26 tweeter uses

The C 26 tweeter uses a neodymium motor and soft Tetolon dome

and erosion-resistant

use an appropriate low-pass crossover

1D ALPHA is a compact monoblock car audio amplifier designed to power a subwoofer system

Rockford Fosgate P1-S4-12 12" 4-Ohm SVC Subwoofer Marine Audio The C 26 tweeter usesThe Rockford Fosgate P1 S4 12 is a 12 inch single voice coil subwoofer designed to add dedicated low frequency output to a car or truck audio system. Its 4 ohm impedance and 250 watt RMS power rating make it suited to a properly matched mono or subwoofer amplifier. It is intended for listeners who want more bass extension and impact than factory full range speakers can provide. This Punch P1 model uses a Kevlar reinforced paper pulp cone paired with a