Energy has served you well for 10 years.
http://www.audioadvisor.com/prodinfo.asp?number=ENC200
Energy specs:
Recommended Amplifier Power: up to 125 watts
Nominal Impedence: 8 ohms; Minimum Impedance: 4 ohms
Frequency Response: 48 Hz-20 kHz +/- 3 dB
Useable Bass Response (-10 db Anechoic): 43 Hz
Sensitivity: anechoic 88 dB; 2 speakers in a typical room 91 dB
Crossover Point: 2.6 kHz
Overall Dimensions: 13.75" tall, 8" wide, 10.5" deep
Weight: 13.2 lbs
SVS specs:
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Ascend specs:
Typical In-Room Frequency Response 53Hz - 20kHz +/- 3dB
In-Room Sensitivity 91dB @ 1 watt / 1 meter
Frequency Response (Anechoic) 58Hz - 22kHz +/- 3dB
Sensitivity (Anechoic) 89dB @ 1 watt/ 1 meter
Average Impedance 8 ohms
Minimum Recommended Power 25 watts
Maximum Continous Power* 200 watts
X-ls specs:
Crossover: 1750Hz, 2nd order
Frequency Response: 55 Hz to 20 KHz (± 3 dB)
Impedance: 8 Ohms nominal
Efficiency: 87 dB (@ 1 watt / 1 meter)
Dimensions: 13.5" H x 8.5" W x 12.125" D
Weight: 17 lbs each; ship weight = 40 lbs (shipped in pairs)