For what I do (50 - 150), the Yamaha Stagepas 300 has enought power, bass, sound quality and built-in reverb ($400). They have a 500 watt model now too.

zuki
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Yamaha 920 / Yamaha Stagepas 100 BTRs / Senn e935 - LIVE
Roland RD 2000 / Tascam DP24sd / ATEM switcher - STUDIO