I had a Belles Ref.150A for a few years and loved the amp. I used a Shunyata hydra4 and then hydra6 when my system grew. I never had a problem, though I did use a big powercable to feed the hydra. I also demo'd a Ref. 350A and had no problem with the hydra keeping the big 350 fed. The Belles rep. also was very comfortable with the hydra when he brought the 350 by.
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