GEQ background color / dates

Triaxis, Quad Preamp, Stereo Power series, Recto Preamp

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pmx1
Bottle Rocket
Posts: 13
Joined: Fri May 19, 2017 5:43 pm

GEQ background color / dates

Post by pmx1 » Wed Apr 18, 2018 5:53 pm

I've just added a Studio Preamp to the collection.

The rack is dated 12/19/1989 . The Graphic EQ background color is blue/gray.
I've a Quad Preamp, dated 11/10/1990. The Graphic EQ(s) background color is black.

I've seen picture of Mark III with both color schemes.

Was this blue/gray color scheme offered only during a specific production period (years ??) ? Or it was a customer choice/option ?
Any info welcome ! 8)

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