Hey Gustavog,
I've owned the M-20s and they need power. I had them hooked up to a Krell KAV-500 with the very same 100 WPC and up to about medium sound levels they were only good. After that, at higher volume levels, the soundstage would collapse. The Krell could not handle the demands the M-20s put on it. Remember the M-20s are a 6-ohm load and are only 85 to 86 dbs of sensitivity. So they are relatively hard to drive. On the other hand, the '805s are an easier speaker to drive but I prfer the M-20s. Hope this helps. Happy hunting......John
I've owned the M-20s and they need power. I had them hooked up to a Krell KAV-500 with the very same 100 WPC and up to about medium sound levels they were only good. After that, at higher volume levels, the soundstage would collapse. The Krell could not handle the demands the M-20s put on it. Remember the M-20s are a 6-ohm load and are only 85 to 86 dbs of sensitivity. So they are relatively hard to drive. On the other hand, the '805s are an easier speaker to drive but I prfer the M-20s. Hope this helps. Happy hunting......John