I used the FPB 650M monoblocks for years. I really liked them, I have not heard the 402e in that same system but have heard it many times with the same brand speakers. Given a choice I would take the 402e. To me, a better sounding amp top to bottom. Good luck with any purchase you end up making.
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AudioNet-Pre G2/MAX, YG Sonja, JL F112v2, Kubala Sosna
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