My experiences with Belles are not good. No exerience with Spectron. Belles were reveiwed highly so I decided to try; the 150A wasn't happening at all, & the 350A wasn't really any better. Dark dark darkest I've ever heard at my house. Even a silver AC cord couldn't brighten them up. I was very dissapointed; they simply didn't synergize with my rig. Your results may vary however, & surely they must perform well in some systems or they wouldn't have been so well reviewed. Try before you buy.
Belles 350A or Spectron Musician II
Considering these two amps to pair with my Proac D15's and Cary 303/200 cd player. I've enjoyed my Bel Canto Evo 200.2, but I have the itch to change. I am intrigued by comments about Spectron perhaps outdoing Bel Canto, and also the great reviews of the Belles, particularly with the midrange, where Bel Canto seems sometimes a bit too analytical. Any experienced comments are appreciated.