25 lbs is a perfectly normal weight for a SS integrated amp. And no one will know more about longevity as you said the company is new. If you like the amp and think it sounds wonderful trust your ears.
I’ve owned a 404R for about two years, and couldn’t be happier with it. Plenty of power, good dynamics, plays well with any number of speakers I’ve tried it with, plus it looks great! I don’t see myself ever getting rid of this amp.
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