NO Way
50 isnt going to hurt it at all. With 300rms you might wanna look into Alpine Type R's 10" and 12" run off of 300rms and are 4 ohm subs. They pound out the SQ and have very decent SPL. I'm not sure about your budget but you can find them off online car audio places all over. But 50 should hurt at all. I've run my 300rms sub at 450rms for 6 months and it didnt hurt it.
1996 Toyota Camry LE Gold Edition (customized)
HU- Alpine CDA-9805
Front-6 1/2 Alpine SPR-17LP
Rear-6 1/2 Alpine SPR-17LP
Subs- Audiobahn AW1200Q
Amps- mids and highs 4 channel alpine 25rms X 4.
Amps-Sub U.S Acoustics USX800D
Custom Slot Ported Box
Tuned to 30 Hz
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