Here's a few concert shots of ELP in action.

Keith Emerson playing amid his keyboard setup. That's the 4-tiered, one-of-a-kind modular Moog synthesizer behind him.
Emerson plays:
- Yamaha, Korg and Moog synthesizers
- Steinway & Bosendorfer Grand Pianos and Yamaha Electronic Grand piano.
- Hammond C3 and L100 organs

Greg Lake plays:
- Gibson and Martin acoustic guitars
- Zematis custom-made bass/6-string double-neck electric guitar.
- Alembic 8-string bass (shown in the photo above)

Carl Palmer plays:
- Pearl drums
- Paiste cymbals