General info, amplification
  The band
  Electric strings
  Acoustic strings
  Percussion
  Piano
  Keyboards

Queen
  Smile
  Early shows I
  Early shows II
  Sheer Heart Attack
  A Night At The Opera
  Summer 1976
  A Day At The Races
  News Of The World
  Jazz
  Crazy tour
  The Game + Flash
  We Will Rock You
  Hot Space
  Montreux 1984
  The Works 1984
  The Works 1985
  Live Aid
  Montreux 1986
  Magic tour
  Freddie Mercury Tribute
  Queen + PR tour 2005
  Queen + PR tour 2006

Brian May
  Back To The Light
  Another World

Early Shows I (27.06.1970 - 24.03.1972)

The band's equipment was very different from what they'd use later on. Freddie didn't play piano yet and 'Doin' All Right' was done in the Smile version (guitar-based).

Percussion

Roger had already a Ludwig kit, with some cowbells mixed in for songs like Liar and Great King Rat. During some numbers (Liar, Great King Rat and Keep Yourself Alive) Freddie played a New Era tambourine.

Bass guitars

John bought a Rickenbacker when he moved to London, influenced by Chris Squire (and not by Paul McCartney as some use to suspect). No back-up yet. As for former bassists, we know for a fact that Barry Mitchell used a Gibson EBO (a beautiful instrument, it looks like an SG guitar), but have no idea about the other two.

Guitars

Brian already had the Red Special. No back-ups yet.

Quotes

John (1982): "From my point of view, the early songs were performed as a power trio with a lead singer. Freddie didn't play piano in those days." Brian (1999): "Having been through a lot of hugely thunderous bass players, this quite shy guy turned up with immaculate Rickenbacker bass and immaculate amplifier, plugged in, and as soon as he started putting bass lines to what we were going we realised it was right."