Well I have to say it does look different! Hey I know I would never mount any of my expensive amps on top of my sub enclosure so it could sit up there and take a beating!! Too many small components inside an amplifier for it to be mounted on a HUGE enclosure like that, way too much vibration for an amp to handle over a long period of time!! I say this cause I have seen three different amps over my yrs in car audio get damaged from the same thing you're doing. Whats the SPL in that thing. Does look way out of place in a Lexus! Lexus=class?