- 
                Frequency range: 100 Hz to 25 kHz The range of the Main Unit can be switched to start at 40 Hz with the  woofer turned off. 
- 
                Min. Amplifier power: 35 W, vacuum tube; 100 W, solid state  
- 
                Impedance: 8 ohm nominal; 3.2 ohm min. at 2.1 kHz  
- 
                size: 54"h x 12"w x 4.5"d (1.37 x 0.47 x 0.11m)  
- 
                Weight: 50 lbs (22.7kg)