Linn Sara product history
With my second pair of Saras came a number of photocopied sheets of info. Although it didn't say 'Linn' anywhere on them, it does look like official Linn info. Below I've typed up the Sara history. The next few pages cover removal of drive units (these are scanned at the moment, when I get a moment I'll try and type them up).

Introduced: 1978
Discontinued: 1989

Upgrade Date Serial No.
Bi-wiring introduced to Sara 9

Oct. 1988 20,913/4
Sara 9:
Introduced, incorporating changes to treble unit (countersunk screws), bass unit (white disc removed and plastic surround changed to thicker rubber), crossover (now 4 ohm)

Sept. 1987 18,299/300
Replaced cannon sockets with two 4mm sockets

June 1985 16,300/1
Bass unit:
Surround changed to plastic material

May 1985 16,051/2
Treble unit:
Smoother response. Incorporates Linn logo on front plate

May 1984 14,731/2
Resistor added in parallel with treble coil

Feb. 1983 13,249/50
Unit damping:
Painted with sound deadening paint.
Cabinet Material:
Material change; now has rounded front

Mar. 1982 10,850/1
Drive unit:
Sealer changed from mastic to silicone sealant

Jan. 1980 10,440/1
Changed from welded plastic to one piece carbon filled ABS with removeable ring for front bass unit. Bass unit venting increased

Oct. 1979 10,280

Mine are actually an active pair that the previous owner had paired with the passive crossover from another (the earlier two-board version). This makes it simple to sketch out the circuit. The inductor values are an average based on measurement with an LCR bridge.

Thanks to the good folks at Pink Fish, I've been able to update the crossover with the actual variant of Kef bass unit and later tweeter. My thanks to 'PL135' and 'RustyB' for the info (see this thread for further info).

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