This area of the site is being produced primarily to create an online record of KEF products from the period of interest. It is hoped that eventually it will contain a comprehensive list of the types of items produced and sold by KEF during that particular period and it will provide technical details and pictures of these items.

Technical details of KEF products

Links

Illustration

Crossovers

DN8 NO6305 for systems consisting of B139 and T15.

The linked schematic for the KEF K2 Celeste crossover DN8 type 6305 was supplied by Colin Royle (17 October 2005)

DN12 SP1004 for system consisting of B139 SP1044; B110 SP1003; T27 SP1032 - Concerto/KEFKIT3 -

Schematic of crossover DN12 SP1004 as provided by Steve Bell 22 January 2004

Info in 'KEF selbst bauen' document
AusKEF for system consisting of B139B, B110A & T27. Information (11 February 2004) and picture on right (21 February 2004) supplied by Colin Royle

DN13 SP1106 for system consisting of B200 SP1014; T27 SP1032

Info in 'KEF selbst bauen' document

DN13 SP1017 for system consisting of B110 SP1003; T27 SP1032

Info in 'KEF selbst bauen' document

DN13 SP1015 for system consisting of B200 SP1014; T27 SP1032 - used in Chorale

DN13 SP1015 schematic and pictures of crossover with renewed capacitors supplied by Wilmslow Audio. Information, schematic and pictures supplied by Steve Bell (sbell.home@lineone.net). Capacitors were out of tolerance and so were renewed.

DN13 SP1036 used in Cantor (B200 SP1014 and T27 SP1032)

DN13 SP1046 for system consisting of B200 SP1014; T27 SP1032

DN14 SP1019 for Cadenza (BD139, B200 SP1022, T27 SP1032)

DN17 SP1052 (used in Corelli with B200 SP1063 and T27 SP1032) Information, schematic and pictures supplied by Steve Bell (sbell.home@lineone.net). Schematic incomplete.

DN18 SP1055 used in Corelli with B200 SP1054; T27 SP1032; BD139

DN19/20 SP1064/1058 for system consisting of B139 SP1044; B110 SP1057; T52 SP1072. Also see Cantata below.

Info in 'KEF selbst bauen' document

DN22 SP1065 (104aB) for system consisting of BD139 SP1042; B200 SP1039; T27 SP1032

104aB Crossover. From: 'HiFi Choice Loudspeakers' by Angus McKenzie 1976; Aquarius Books Ltd; p65

Info in 'KEF selbst bauen' document

Constructor Series Model CS1 including B110B SP1057; T27A SP1032; and crossover CS1.

Photos of the CS1 crossover PCBs, as supplied by Falcon Acoustics and schematic of CS1. Information, schematic and pictures supplied by Steve Bell (sbell.home@lineone.net).

More details

Constructor Series Model CS3 including B200G SP1075; T33A SP1074; and crossover CS3

More details

Constructor Series Model CS5 including BD139B SP1082; B200G SP1075; T33A SP1074; and crossover CS5

More details

Constructor Series Model CS7 including B139B SP1044; B110B SP1057; T33A SP1074; and crossover CS7

More details

Schematic of SP1144 crossover for 103.2. On Sunday 10 April 2005 Colin Royle supplied a photo of a late circuit board (SN243xx) from a Ref 103-2. The two red elements in the photo are the transistor and diode packs embedded in a black brick in earlier incarnations.

Schematic and picture of crossover for KEF 105.2 (SP1119) provided by Colin Royle on Saturday 21 February 2004

Schematic of crossover for commercial KEF Cantata
Also see DN19/20 above and picture.
Information (11 February 2004) and picture on right (21 February 2004) supplied by Colin Royle
Schematic of Crossover SP2007 or SP2007A for Carlton II (BD139B SP1082, B200G SP1075, T33A SP1074) was supplied by Colin Royle on Thursday 4 November 2004.
Schematic of Crossover SP2026 or SP2026A for Carlton III was supplied by Colin Royle on Sat 30 Oct 2004.
Schematic of Calinda crossover (B200 SP1054, T27 SP1032) provided by Colin Royle on Saturday 31 July 2004.
Crossover SP1055 used in Calinda SP1053
Schematic of Concord IV crossover (B200G SP1069, T33 SP1074) 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.
Reference 104 Crossover. From: 'HiFi Choice Loudspeakers' by Angus McKenzie 1976; Aquarius Books Ltd; p65
Reference 103 Crossover. (SP1050) Schematic and other pictures supplied by by Colin Royle on 13 and 14 February 2006