Some suggestions on Subwoofer please!(URGENT)

[brakbrak]

Hi guys,
Our praise and worship at my church has only used 2 speakers for the congregations and 1 "monitor"(a speaker used as a monitor) for all four of us (a guitar, bass, key and drum). I do not like how our team sounds because I can hardly hear my bass clearly( i play 5 string and the B string sounds horrible in this setup). Is there any recommendation for improvement?Is subwoofer really necessary as my fellow bassists have suggested?Any recommendation is welcome and appreciated!
Thanks

[seanm]

If you cannot hear the bass, you need a bass amp, not subs.

If the audience cannot hear the bass, then you might need subs.

[Calaverasgrande]

I'd look for IEMs or more monitors. Subs will fill in teh bottom end, but wont do anything for clarity.

[Bakkster_Man]

What's the frequency response of the speakers you have right now? If they don't go down to ~30Hz, that's your problem. If they do, your amps might not have wattage to handle the room loud enough.

Either way, a subwoofer with crossover might work for you. My church uses a dbx Drive Rack, it really works well.

But as seanm said, if the room hears you fine, it might just be an issue of needing better monitoring on stage.