Brazilian amps have been doing this for a LONG time. There just isn't room on those small amps for multiple power and ground terminals so use very short runs from the battery bank or use multiple input terminals from toolmaker or similar. Most of the Brazil amps will make rated power or close enough to it.
Yes, there's a reliability issue, but there is with any amp of that power level and if you're buying new, put up the extra 70$ or whatever and buy the third party warranty from
eBay/
Amazon or whatever.
I'm seeing a few Taramps around here and they seem to be performing very nicely.