If you must, you can use an active sub and take the LR outputs to a power amp which drives your NS10s.

However, you need to be really careful about matching your sub to the main monitors if you want a consistent sound. It's too easy to get a mix that you think sounds good but won't translate well to other setups. There have been some recent threads about this on RO.

I do not know of any studio sub with built in amps for a third parties monitors. It would not make any sense to me.

sheet wrote: I do not know of any studio sub with built in amps for a third parties monitors. It would not make any sense to me.

Do you have any suggestions? This thread is a follow up to this one:
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sheet wrote: I do not know of any studio sub with built in amps for a third parties monitors. It would not make any sense to me.

Cheers, I'll have a dig around and read through them.