Hello - I am brand new to this forum but have tinkering with Home and Car Audio for the last 15 years.
I decided to take the plunge and build my own Home Theater subwoofer cabinet because the subs in my price range were pretty poor quality. The models I really liked were far too expensive.
I found a great deal on a pair of Cerwin Vega VMAX15.2 subwoofers.
The specs are as follows:
No. of Coils: 2
Sensitivity ([email protected]
Power Handling RMS: 600 Watts
Nominal impedance: 2 ohms
Voice Coil Dia.: 2 1/2" /65mm
Mounting Dia.: 14 3/32" /358mm
Mounting Depth: 7 1/8 /181mm
Spkr. Displacement: .22cu ft /6.2 liters
Vas: 2.9cu ft / 82.32 liters
Xmax: +/-0.8" /17mm
Revc: 1.32 ohms /coil
WINISD shows an EBP of 42.6 so I initially modeled a sealed enclosure but I wasn't really happy with the Transfer Function Magnitude curve below 40Hz. After some tweaking I modeled the following ported enclosure:
QTY 2 Cerwin Vega VMAX 15.2
Internal Volume: 10 cu ft (shared airspace)
Port QTY: 3
Port Diameter: 6"
Port Length: 54.64"
Tuning Frequency: 19.52Hz
I am little leary of porting these subs because of the low EBP but the transfer function magnitude curve looks amazing and with the 3 large long ports (though they would need to be elbowed to fit inside the box) would really cut down on port velocity and noise.
Coupled with the Behringer EP4000 running at 8ohms bridged both woofers should get plenty of power. For the life of me I can't figure out how to get WinISD to model SPL or cone excursion. Could someone with a little more experience building diy subs take a look at this setup for me and let me know if it looks good or if I should go back to the drawing board.