The Halo A21 is very much hi-end and is a relative bargain by today prices, of course it does have a sonic signature like everything else and in this case it's a smooth and laid back sound, best teamed with speakers a bit on the bright and forward side, like Wilson's , Horns , et al ...
On Maggies they do have a good sound , again just a bit laid back for my taste, regardless an excellent amp in finish, design and build quality ...
Worth considering /purchasing ..