Schematic for Concord IV crossover.

Circuit diagram below was provided by Colin Royle on Friday 13 August 2004. On Sunday 10 April 2005 Colin Royle also supplied a photo of an SP1137 circuit board used in the Concord IV (B200G SP1069 + T33 SP1074) and III. The III used an Audax treble unit HD100D25 like the Celestes III & IV.