Hi Clo, to connect a sub to your system you would leave the system as-is and then run a separate pair of speaker cables from the amplifier to the subwoofer - to do this you need a subwoofer that has what looks like speaker terminals on it. You will not be able to eliminate low frequency information going to your monitors in such a setup, but I think you would still find substantial improvement in the areas that concern you. I have had Arros for a few years and agree with the other posters; for HT use your best bet is probably to keep your monitors and add a sub.
As far as the Arro's efficiency is concerned, the speaker may be physically small but in my experience it requires quite a bit of current to maximize its dynamics, which are inherently compromised due to the speaker's design. It's a great speaker, but in my experience if you are looking for big dynamics and bass energy you should look elsewhere. Your mileage may vary, as always.
As far as the Arro's efficiency is concerned, the speaker may be physically small but in my experience it requires quite a bit of current to maximize its dynamics, which are inherently compromised due to the speaker's design. It's a great speaker, but in my experience if you are looking for big dynamics and bass energy you should look elsewhere. Your mileage may vary, as always.