Rough Power Levels?

[SehnKhan]

Roughly what sort of Db rating would you expect from the following system?

Head Unit: Pioneer 4x50Watt Mosfet Unit. DEH-P5450

Front Fill: Focal 165v 6.5" Splits 75 Watt RMS
Rear Fill: Pioneer 330Watt TS-D690R 2-Way 6x9's
Amp For F/R Alpine MRV-F340 4/3/2 Channel. 55Watts x 4 RMS

Subwoofers: 2 Alpine 10" SWR-1041D DVC Type R 300 Watt RMS 4Ohm+4Ohm Woofers
Amp For Subs: Alpine MRD-M500 AccuClass D Mono block Amp. 500Watts x 1 RMS.

Sorry for the techno babble about it, but trying to give as much infor as possible.
Subs are going into a sealed enclosure facing the back of the car. If anyone can give me an idea of dB I would appreciate it.

[Trav]

dB is just scaled measure of anything you like...

In your case you are after a log scale of Power, so therfore

Power(dB) = 10log10(Pwatts)

Or if you are asking if you had this system turned up flat out what Sound Power (dB) then there is no real way of measuring sound power without a meter.

Hope this helps a bit...