Kole Audio electronic PH2-1500 - Manual (Page 13)

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2 CHANNEL TRI MODE CONFIGURATION
PH2-700 / PH2-1000 / PH2-1500 / PH2-2000 / PH2-2400
HEAD UNIT
1.Lowest Recommended Impedance is 4ohm Stereo
2.RCA Inputs are connected to both Left and Right channels
3.Output configured for stereo operation