You need to check the Jensen web site for complete specs:
"JENSEN makes it easy for you to turn your TV room into a true home theater. We've assembled a powerful 5.1 surround sound system that delivers optimum sonic impact so you can experience films the way Hollywood intended. The amplified subwoofer delivers 100 Watts RMS for deep bass that meets the challenge of any soundtrack. The dual woofers of the magnetically shielded center channel produce realistic sonic imaging of voices as actors speak and move across the screen. Don't wait any longer to get in the middle of crisp dialogue, enveloping music and sound effects so intense you'll have to remind yourself it's only a movie!
FRONT SATELLITES
Drivers: 4" with 1/2" tweeter
Frequency Response: 80 Hz-20 kHz ± 3dB
Sensitivity: 90dB, 2.83V/ 1 meter
Impedance: (nominal): 8 ohms
Recommended Amplifier Power: 25 to 90 watts
Dimensions: 9.25" x 5.875" x 6.25" (HxWxD)
Finish: Black
CENTER CHANNEL
Woofer: Dual 4" drivers
Tweeter: 1/2" dome
Impedance: (nominal): 8 ohms
Frequency Response: 80 Hz-20 kHz ± 3dB
Sensitivity: 92dB, 2.83V/1 meter
Recommended Recommended Amp Power: 25 to 100 watts
Shielded: Yes
Dimensions: 5.875" x 13.375" x 6.25" (HxWxD)
Finish: Black
REAR SATELLITES
Driver: 4"
Frequency Response: 100 Hz-15 kHz ± 3dB
Sensitivity: 88dB, 2.83V/ 1 meter
Impedance: (nominal): 8 ohms
Recommended Amplifier Power: 25 to 75 watts
Dimensions: 6.75" x 5.875" x 6.25" (HxWxD)
Finish: Black
SUBWOOFER
Driver: 8" long throw woofer, down firing
Frequency Response: 30 Hz-150 Hz
Variable Crossover: 50-150 Hz, 12dB/Oct
Amplifier Power: 100 watts
Divensions: 15.68" x 11.87" x 13"
Weight: 20 lbs.
Finish: Black "