S Series 170 amp Racing alternator for 63-85 GM - 1 wire - BLACK ANODIZED EX35 it has 1 INPUT Parametric

it has 1 INPUT Parametric Equalizer and 1 OUTPUT Parametric Equalizer with gain control

4mm Voice Coil Former Material  KSV Winding Material       EISV Cone Material         Glass fiber Surround Material   Rubber Basket Material     Steel Magnet Material    Barium Ferrite Magnet Weight      550g TWEETER   Nominal Diameter 1" (25

000Hz Voice Coil Diameter 1

you select the frequency and bandwidth for the enhanced bass action

S Series 170 amp Racing alternator for 63-85 GM - 1 wire - BLACK ANODIZED EX35 it has 1 INPUT ParametricThe S series of 6 phase alternators offers incredible low RPM output in a compact and durable package. Highly efficient, these units use less horsepower than conventional 3 phase alternators. 12 diodes, twin rectifier plates and outstanding airflow ensure much better durability than standard Delco based alternators, even in severe conditions. This custom designed housing directly replaces standard Delco 10DN, 10SI and 12SI alternators on most 1963