Would someone with some experience in box building be kind enough to check my numbers for me please.

Sub .... Blaupunkt TSw1200

Power handling: 200 watts RMS/600 watts peak
VCdia: 2"
Impedance: 4 ohms
Magnet weight: 40 oz.
Fs: 25 Hz
SPL: 93 dB 2.83V/1m
Vas: 4.18 cu. ft.
Qts: 0.34
Xmax: 11mm
Dimensions: Overall Diameter: 12" Cutout Diameter: 11" Mounting Depth: 5.47"

Box dimensions

W 18 inches
H 18 inches
D 14 inches
Built from 3/4 inch MDF.

Port size

Tuned for 40hz
Diameter 4 inches
Length 9.17 inches (PSP calculator) , 9.59 inches (WinISD)

Planning on putting a pair into 2 custom enclosures in the rear of a club cab dakota and giving each 175watts RMS. Not looking to blow anybody away as this is a daily driver, but I am looking for a nice clean sound. The subs are a definite, the rest I can change around if required.

Any suggestions appreciated.