I think you're getting mixed up here.
First, What impedance (2ohm or 4ohm) sub are you getting? I assumed, and I shouldn't have.

Dont think of your sub being Mono or stereo.
An amp with 1 channel can drive as many subs as you want, as long as the impedance is correct for the amp. Same goes with 2 channel amps.
Bridging an amp is when you have a 2 channel amp, say 250wRMS per chan, and you bridge them to make a 500w RMS 1 channel.

When you say "i know it [your sub] can be bridged in series or parallel circuit" your talking a bout the voice coil. Which isn't bridging. Series or parallel will give you different impedance's. Which will determine which amp you'll need to get.