Can I run a bridged sub (vibe 12" slick) and 350rms amp (vibe black box stereo ll in bridged mode) in my 1965 camper with still adequate charging of the battery occouring The battery (85ah) is new, the alternator is 75a (might be 55a - I'll check) The power wire to amp is 8awg and the amp will have an inline on/off switch to allow just head and mids/tweets at times.