diy subwoofer build

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Hello all
I need some advice for a subwoofer build. The driver is 12" DVC 2x8 ohm 2×150W RMS wired in parallel (4ohm 300W) BR enclosure. Into desired 30 -80 Hz region SPL is around 75 to 85 dB/W/m. My main speakers are 86dB/120Hz.
My worry is does BSB275 is capable to provide enough power matching subwoofer to main speakers, or I should go for slightly more powerful MOSFET BSBPV300 ,or even further BSBPV500.
I don't need equalization neither anti thump delay - just some good and reliable amplifier, available in UK.
Any suggestions are welcome. Thank you in advance.
Regards Georgi
 
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