Any audio amplifier can be used with the LFT-11. The minimum recommended
amplifier power rating is 10 watts RMS per channel. We do not believe any built in amplifier that is
included on a internal sound card has sufficient amplifier power to drive the LFT-11 to useable
levels directly without the use of a external amplifier. The Radio Shack Optimus STA-300 amplifier
optionally included with the LFT -11 is rated at 15 watts RMS per channel and will drive the
LFT-11 to suitable levels for most situations. Any other power amplifier or receiver can be used
with the LFT-11 with a RMS power rating of between 10 and 50 watts per channel.