I have to disagree with Doug about 12.6 Hz being too high a resonant frequency. IMO, it is just about perfect. See the following link for a more lenghty explanation. http://db.audioasylum.com/cgi/m.mpl?forum=vinyl&n=16350&highlight=compliance+range&r=&session=
I have used the Shelter 501 on a well-tempered classic. To my ears, it had a touch of honey added that might not be a good match for an already warm system. Also, it had a somewhat distant perspective. Still, it was always musical with excellent resolution and bass response in my system. Stereo imaging and depth were exceptional.
Mark, if the sonic attributes of the Shelter appeal to you, I say go for it. It is a great match for your arm.
I have used the Shelter 501 on a well-tempered classic. To my ears, it had a touch of honey added that might not be a good match for an already warm system. Also, it had a somewhat distant perspective. Still, it was always musical with excellent resolution and bass response in my system. Stereo imaging and depth were exceptional.
Mark, if the sonic attributes of the Shelter appeal to you, I say go for it. It is a great match for your arm.