XtremPro Hi-end Ground Loop Noise Isolator / Filter for Car Audio / Home High-fidelity System - Black (65042) THD:&lt; 0.001 % / Transmission Ratio: 1:1 Input/output impedance: 12 k Frequency Range: 20-30,000 Hz Gold-plated RCA Jacks / 2 Inputs, 2 Outputs Size / Weight: 3.54" x 2.5" x 1.18" / 5oz