Martin Logan CLS setup

First we should talk about the rest of your system to be sure we are not wasting our time with room placement and room acoustics. The CLS is picky about electronics and cables.

Your CLSIIs will play with your 60 watt amp, but soon you will hear the short comings of not enough power. You may want to consider tube amplification. Any tube amplifier with 100 watts or more will do.

I assume you will be placing your speakers on either side of the fireplace. Pull the speakers 3' to 4' out with very little toe in. You will want to hang some window treatment on the windows behind the speakers. Don't worry about room treatment for now. See how the speakers react to your room.

If the speakers will not play loud enough there is a chance the panels are clogged and need replacement. When the panels get dirty from air born contaminants and humidity the efficiency of the speaker drops dramatically. Using the brush attachment with your vacuum cleaner and slowly moving it across the panels on a regular basis is a good practice. Replacement panels are expensive.

You will most likely want to try a subwoofer.

When I had CLS's I tried subwoofers with mixed results. I always thought the Vandersteen subwoofer would be a good match. It has a unique way of connecting to the system and relieves your main amplifier of dealing with the lowest octaves. It uses three 8' woofers in a slot loaded configuration. It is very quick yet moves air equivalent to a 15" woofer.

I'm not sure that the CLS-1 is more demanding than the CLSII.

Minimum recommended power for the CLSII is 80 watts and the minimum impedance is 1 ohm.