It costed me Rs 21,000. It has built in amplifier.
I keep the volume of woofer half way and it gives good rhythm and bass but it won’t shake the windows even at max power so you’ll have to understand that. I almost always drive alone and high bass gets tiring after a while so this was the best option for me. If you intend to play music loud then this won’t be a good choice, at all.
In my opinion, it’s a good choice if you don’t have a passenger often and you are not crazy for loud music.
But I would first replace stock speakers before selecting any type of woofer for cultus. I have the old cultus too and I have pioneer 6970v2 coaxal in the rear and never felt need for a woofer as it does good job on its own.
