Home » RFTECH » Woofer WiringWizard Woofer WiringWizard  Home     Knowledge Base     Woofer   BoxAdvisor     Woofer   WiringWizard     Woofer   BoxWizard     Amplifier   WireCalculator     Repair   Status     Discussion   Forum    Search by Woofer Impedance Search by Amp Impedance Wiring Formulas Need to know what type of amplifier is compatible with your woofer system? Select your woofer's driver quantity and voice coil impedance to determine available wiring configurations. The resulting impedance load will help you determine a compatible amplifier. Choose Woofer Configuration <Select Quantity> 1 Woofer 2 Woofers 3 Woofers 4 Woofers <Select Impedance> Single Voice Coil - 4Ω Single Voice Coil - 8Ω Dual Voice Coil - 2x2Ω Dual Voice Coil - 2x4Ω New Speaker Polarity Positive + Negative - red post black post Old Speaker Polarity Older Rockford Fosgate speakers (SP, SPP, RFA) utilized painted dots to indicate terminal polarity & impedance. Positive + Negative - purple 4Ω no dot red 8Ω no dot Knowledge Base Differences between SVC and DVC subwoofers Differences between subwoofer voice coil types How do speakers get blown? Why do they sound distorted? Instructions on building a subwoofer enclosure 600 S. Rockford Drive, Tempe, AZ 85281 - U.S.A. © 2010 Rockford Corp. All rights reserved.