Speaker Features:Power Handling Per Pair: 300 Watts Peak - 100 Watts RMS.2-Way Design.Woofer Size: 6.5".Tweeter Size: 1/2".Impedance: 4-Ohms.Sensitivity: 90dB.Frequency Response: 35-21,000 Hz.Cutout Dimensions: 5.18".Top-Mount Depth: 2.5".Pyle Amplifier:Built-in Bluetooth for Wireless Music Streaming4 Channel Amp SystemDual MOSFET Power SupplyMarine Grade ConstructionWaterproof Marine Rating IP-01Dual Adjustable Input GAIN Level ControlsSilver-Plated Speaker Output Terminal ConnectorsAdjustable Input GAIN Level ControlOutput Power: 100 Watt x 4 MAXAmplifier Class: ABFuse Type: 20AInput Impedance: 10k Ohms (Low), 100 Ohm (High)Input Sensitivity: 250mV (Low), 2.5V (High)T.H.D.: <0.04%S/N Ratio: 95dBPower Supply: DC 12VMatching Speaker Impedance: 4-8 OhmsAmp installation kit:Designed tor motorcycles6 toot length of red and black T-Spec OFC power and ground wire with a T-Spec V8MANL fuse holder and 60 amp fuse protected by a black nylon braidPre-terminated ring terminals make connections to the battery simpleTwo 4 foot pieces of 16 gauge OFC speaker wire protected by black nylon mesh makes upgrading the factory speaker wires or adding new speakers a smart choiceEven for those upgrading the Harmon Kardon system – the ST-AK8 comes with two 47-ohm 1/2 watt resistors to keep the factory radio outputs activeAll the necessary installation hardware is included along wtth a 4 × 6 inch hook and loop mounting pad for micro-amplifiers to hold the amplifier securely in place