Great powered "spot" speaker for vocals in small band, or as a stand-alone small speaker for guitar & microphone. Galaxy Powered Speaker - CORE PA5X140. Two are available. $40/each. These are fabulous for vocals, or as a stand alone practice amp with two inputs: Microphone and line, with separate controls on both.
We used two of these for live performance for years. sometimes stringing an unpowered spot speaker or two as well. They're pretty bombproof, and with each powered speaker able to power a second _unpowered_ spot speaker, your ensemble can finally all "hear one another" during performance. Yeah. Greatly improves harmonies.
Two are available, each in Manchester NH exit 9 off I-93 or Amoskeag Bridge Exit off of Everett Tnpk Rte 3.
Good weight to these speakers, a statement about longevity. well-constructed case, and a solid power supply to deliver good quality audio. Two inputs, a 1/4" jack (back), and an XLR jack (front), each under separate volume control, with three filters for audio output. Each speaker "sits" on a typical, vertical microphone stand -- and I can add one to the deal for $10 more.
Each is a great practice amp too -- with an input for guitar or keyboard, and a microphone -- no mixer needed.