First up is a 4x50W OEM Volvo Amplifier with harness from a 98 T5. Plug and play on all 850's and X70s. Includes mounting bracket for installation forward of the heater core and wiring harness. This is required to upgrade to the higher end OEM head units including the SC-900 and 901.
The second amp is a 4x40W unit from a 96 850R with harness and mounting bracket. Looks exactly like the first unit except 40W less powerful. I couldn't tell a difference in the power when testing these two in my car.
This is a completely plug and play upgrade. You do not have to do any wire cutting/splicing to install this amp. It includes all of the factory plugs to make for a seamless installation using your factory audio wiring. These amplifiers are compatible with all SC-81X units and SC-901X units. Both have been tested and work, these really wake up the stock audio systems.