No. For a subwoofer you really should have a decent crossover to protect it from harmful frequencies as well.
I would get a plate amplifier designed for powering subwoofers from www.partsexpress.com - Those are about the least expensive available and are designed for the task you have in store. You also will want to watch the Ohm load on the amplifier so you don't blow it up.
- Theater, whole house audio, and technology consultation during the build and installation process in the Washington, DC metropolitan area.