The integration of a sub(s) is one of the most popular topics discussed in these forums. Beside the choice of a particular sub the most important is placement in the listening environment. Each room is different.
You didn't state your main objective to add bass to your sound? Some like a powerful/floor shaking bass and others just want to fill in missing sound from the capability of the main speakers. What's your goal?
Maybe I missed something in your original post but I don't know what amp and speakers you are currently using? Whether floor standers or monitors. And, what type of amp you're using to drive them?
I also have a 2 channel setup using monitor speakers. I didn't want overpowering bass but just enough to fill in the complete sound. A compromise to using full range floor standers. With my setup I use the speakers with 2 10" subs. My integrated amp doesn't have any type of bass management capability. I use an Outlaw ICBM bass management unit. You could call it an active crossover. What it does is to send frequencies that the main speakers can't handle to the subs...thus relieving the mains from duty they can't handle. That's important.
Sub placement is the most important factor. If you just want to "round out" your sound then one or two subs will do the trick. Just be careful of crossover frequencies between the mains and sub.
You didn't state your main objective to add bass to your sound? Some like a powerful/floor shaking bass and others just want to fill in missing sound from the capability of the main speakers. What's your goal?
Maybe I missed something in your original post but I don't know what amp and speakers you are currently using? Whether floor standers or monitors. And, what type of amp you're using to drive them?
I also have a 2 channel setup using monitor speakers. I didn't want overpowering bass but just enough to fill in the complete sound. A compromise to using full range floor standers. With my setup I use the speakers with 2 10" subs. My integrated amp doesn't have any type of bass management capability. I use an Outlaw ICBM bass management unit. You could call it an active crossover. What it does is to send frequencies that the main speakers can't handle to the subs...thus relieving the mains from duty they can't handle. That's important.
Sub placement is the most important factor. If you just want to "round out" your sound then one or two subs will do the trick. Just be careful of crossover frequencies between the mains and sub.