Don't know... you would have to check on the speaker specs... maybe at the eminence website?
For more "sound"... you would want to use higher efficiency speakers. This spec is usually measured in DBs, using a standard power and distance, normally one watt at one meter. The higher the DB SPL (sound pressure level) number the louder the speaker will be with the same power input.
Check the frequency response spec to get an idea of how low you can go. A 80hz to 5khz speaker will have less bass than a 40hz to 3khz speaker as an example.
