For Civic 11th Gen only Original parts from Honda Add these speakers to complete and copy the 12 BOSE speakers system of a high spec Civic. If you will buy a subwoofer, amplifier is needed to make it work. Provide additional bass and improve the overall listening experience 2 options to wire these speakers, 1st connect to the OEM Head Unit plug and 2nd is to purchase a separate amplifier. We recommend to purchase an amplifier to boost and improve the sound quality of all the BOSE speakers. BOSE Subwoofer BOSE Satellite Speaker (2pcs needed) Position of the speakers are already marked. You need to cut a hole to mount the speakers properly.     There are 2 options for adding an Amplifier: 1. BOSE Amplifier - This one requires the high spec 9" center screen to make it work. 7" screen is not compatible. Please contact us first if your screen is 9". We need to see your stock main host plug at the back.   2. Aftermarket Premium Amplifier - This is the choice for civic with 7 and 9" screen. This model is way better than BOSE amplifier when it comes to sound output. It has DSP functionality also which means it can be tuned. It has Dolby Technology and using ST-7851L dual amplifier chip. It comes with OEM Honda T-Harness for plug and play installation. Choose P35/P610 if you are going to install a BOSE subwoofer. Choose P25/P48 if you are not planning to add BOSE Subwoofer and just want to improve sound quality. Both P35/P610 and P25/P48 are capable of adding an aftermarket subwoofer aside from BOSE. AINAVI AMP+DSP P35 (P610 Upgraded Model) - SPECS Peak power is 8x100W + 2x50W 1.25kg weight OP Amp model is Japan JRC5532 Working Voltage 10-15V Frequency Range 20Hz-20kHz Impedance 4Q U-Disk and Bluetooth Supported Input Method - 6 channel high level + 2 low level  Output Method - 10 high level output / +10 low level  output Tune via windows software ADI Professional Dynamic Bass Enhancement Intelligent Noise Suppression Dolby Technology Premium Brushed Aluminum Casing with Logo White LED Backlit AINAVI AMP+DSP P25 (P48 Upgraded Model)- SPECS Peak power is 4x100W 0.8g weight OP Amp model is Japan JRC4558 Working Voltage 10-15V Frequency Range 20Hz-20kHz Impedance 4Q U-Disk and Bluetooth Supported Input Method - 4 channel high level + 2 low level  Output Method - 4 high level output / +8 low level   output Tune via windows software ADI Professional Dynamic Bass Enhancement Intelligent Noise Suppression  Dolby Technology Premium Brushed Aluminum Casing with Logo White LED Backlit Installation Position is Front Passenger using Velcro tape.