4 Audiopipe APMB-6SB-C Two Pair 6-6.5" Sealed Back Full Range Loud Speaker Mid APMB-6SB-C - 6" 250 Watt Low Mid Frequency Loudspeaker - 4 SPEAKERS ***APMB-6SB-C REPLACES APMB-6SB-B*** Power (Max) 250 Watts; Power (RMS) 125 Watts; Frequency Response 350-5000Hz; Sensitivity 99 dB; Voice Coil 1.5"; Mounting Depth 60mm (2 3/4"); Impedance 8 Ohms; Magnet 20 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)