[. . . ] [. . . ] Meanwhile, the SAMXOVER passive crossover manages all the power the S7160 can supply. Four S4Ai in-wall multipole ambient surround speakers, two S2S 15-inch, 250-watt powered subwoofers and electronics that include an SDP-5 processor/controller, SDEC-3000 digital equalizer, S7160 7-channel amplifier and S820 2-channel amplifier round out the Synthesis Two Array system. It delivers all the realism of today's most sophisticated digital sources. Upgrade your system by adding a second S800 and a second pair of S2S subwoofers or move up to the ultimate in low-frequency with the Synthesis Two Array Plus, using a pair of S1S-EX subs for rooms of up to 18, 500 ft. SDP-5 SAM1HF THX® Ultra 2® Surround Synthesis® ArrayTM THX® Processor/System Horn Module Controller SDEC-3000 Synthesis 8-Channel Digital Equalizer SAM2LF Synthesis® ArrayTM THX® Dual 8" Low-Frequency Module FROM 1, 500 TO 16, 000 CUBIC FEET 43­ 212 CUBIC METERS 1520 WATTS RMS / 3600 WATTS PEAK 98dB HIGH FREQUENCY 92dB LOW FREQUENCY SYSTEM CONTAINS: 1 ­ SDP-5 THX® Ultra 2® Surround Processor/System Controller 1 ­ SDEC-3000 Synthesis 8-Channel Digital Equalizer 1 ­ S7150 7 x 160 Watt THX® Power Amplifier 1 ­ S800 2 x 200 Watt, 1 x 800 Watt THX® Power Amplifier 3 ­ SAM12X Synthesis Two Array Passive Crossover for SAM1HF and SAM2LF 3 ­ SAM1HF Synthesis® ArrayTM THX® Horn Module 3 ­ SAM2LF Synthesis® ArrayTM THX® Dual 8" Low-Frequency Module 4 ­ S4AI Vertical or Horizontal Multipolar Flush-Mount THX® Surround Loudspeaker 2 ­ S2S 15-Inch THX Subwoofer S7150 S4AI 7 x 160 Watt THX® Power Vertical or Horizontal Amplifier Multipolar Flush-Mount THX® Surround Loudspeaker S800 2 x 200 Watt, 1 x 800 Watt THX® Power Amplifier S2S 15-Inch THX Subwoofer SAM12X Synthesis Two Array Passive Crossover for SAM1HF and SAM2LF [. . . ] [. . . ]