(4) AUDIOPIPE APMB-638SB-C TWO PAIR 6" 6.5" SEALED BACK LOUDSPEAKERS CAR AUDIO APMB-638SB-C - 6" 300 Watt Low Mid Frequency Loudspeaker 4 SPEAKERS Power (Max) 300 Watts; Power (RMS) 150 Watts; Frequency Response 500-5400Hz; Sensitivity 98 dB; Voice Coil 1.5"; Mounting Depth 68mm (2 3/4"); Impedance 8 Ohms; Magnet 38 Oz Sealed back design - controls speaker's cone movement for excellent midrange sound with almost no adjustments needed PLEASE CONTACT US FOR SHIPPING OUTSIDE CONTINENTAL USA(Alaska, Hawaii, Puerto Rico, Virgin Islands, Pacific Territories)