NILES AUDIO SVL-2 The SVL-2 uses 12 position volume controls which are superior to 10 position designs. You get a broader range of adjustmentthere are 10 steps of attenuation instead of 8. Steps 11-6 attenuate -3 dB per step; steps 5-2 are 6 dB per step. Step 12 is "full-on" and step 1 is "full-off". Greater dynamic rangeyou get 42 dB of total attenuation instead of the usual 20 or 30 dB. May be used with 4, 6 or 8-ohm speaker systems. Isolated right and left channel ground returns make the SVL-2 compatible with all types of amplifiers Power handling: 100 watts/channel continuous music power.