The advantage to using two subs is this:
A single subwoofer will give you a unique pattern of reflection-related peaks and dips depending on where you place the sub and where the listening position is. These peaks and dips will be large enough and far enough apart to be audible.
With two subwoofers placed asymmetrically, their respective patterns of peaks and dips will never coincide at any listening position so the net result is smoother bass throughout the room.
You'll need for at least one of the subs (usually the one farthest from the main speakers) to have a 4th order crossover so that you don't hear its location.
No reason at all why you can't use two different subs. That might even result in a smoother overall response.
I use four small subwoofer modules in a system I showed at T.H.E. Show in Las Vegas about a month ago.
One disadvantage would probably be this: For a given total dollar expenditure, one big sub will usually give you deeper and louder bass than two or more smaller subs will.
Duke
A single subwoofer will give you a unique pattern of reflection-related peaks and dips depending on where you place the sub and where the listening position is. These peaks and dips will be large enough and far enough apart to be audible.
With two subwoofers placed asymmetrically, their respective patterns of peaks and dips will never coincide at any listening position so the net result is smoother bass throughout the room.
You'll need for at least one of the subs (usually the one farthest from the main speakers) to have a 4th order crossover so that you don't hear its location.
No reason at all why you can't use two different subs. That might even result in a smoother overall response.
I use four small subwoofer modules in a system I showed at T.H.E. Show in Las Vegas about a month ago.
One disadvantage would probably be this: For a given total dollar expenditure, one big sub will usually give you deeper and louder bass than two or more smaller subs will.
Duke