You have to get an OEM integration interface so that the output from your clarion unit will be compatible with your bose equipment. There is no safe way to use your bose speakers with your clarion unit without one of these devices. You will need the following stuff for a great install. I recommend Metra and Soundgate products, but you can use other brands.
OEM Integration Interface--- Soundgate model #OEM4A *note: Call a good shop for this product. If they do not have it... ask for a substitute product. (fyi...these adaptors are not that cheap)
All of the model numbers below are from Metra. (brand name) You can find this stuff at Circuit City.
Dash Kit - Metra # 99-7401 OR 99-7407
Antenna Adaptor - Metra # 40-NI10
Wiring Harness - Metra # 70-1763 *note: you will attach the OEM integration adaptor to the speaker wires on this harness and then to the clarion unit.
If you use this stuff you will have a perfectly integrated system. Hope this helps out. Let me know how it goes.
http://www.metra.comhttp://www.soundgate.comThese are the companys' websites.