Thanks for all the responses, and especially for the great post by Gunbei. The thin and dizzy mids that you intitially had is exactly what I'm experiencing.
I'm actually planning on replacing the Arcam 5 amp with a Levinson 29, when I can get hold of one. I'm also planning to borrow some high-ish end power amps from a friend to see if they fix the problem on a temporary basis. I'm reluctant to give up the Benchmark DAC though, I really like it.
The Castles had a front-firing bass port, so I'm shocked at how much boom I experience from the rear-firing Proacs. Just to check is the advice: 3 or 4 feet between the speaker and the wall is measured from the back or the front of the speaker?
I'm actually planning on replacing the Arcam 5 amp with a Levinson 29, when I can get hold of one. I'm also planning to borrow some high-ish end power amps from a friend to see if they fix the problem on a temporary basis. I'm reluctant to give up the Benchmark DAC though, I really like it.
The Castles had a front-firing bass port, so I'm shocked at how much boom I experience from the rear-firing Proacs. Just to check is the advice: 3 or 4 feet between the speaker and the wall is measured from the back or the front of the speaker?