We do not archive any info on our speakers, but you can identify them by looking at the Rear Input Panel for the Model Number. After the serial number, there may be letters, i.e., Model 2 serial number #32400 Ci. This would be a Model2Ci. Etc. Serial numbers are not necessarily sequential but are always paired. Note that all model designations had approximately yearly upgrades internally that are neither identified nor archived.
-Model 1B’s have a serial number but no letter, in production from 1983-1996.
-Model 1C’s have a “C” after the serial number, in production 1996-2010.
-Model 1Ci’s have a “Ci” after the serial number, in production 2010-2021.
-Model 1Ci+’s have a “ci+” on top of backplate, tweeter contour knob removed. 2021-
-Model 2’s have a serial number but no letter, in production 1977-1978. NO PARTS/NO MORE FACTORY SERVICE.
-Model 2A’s have an “A” after the serial number, in production 1978-1979 NO PARTS/NO MORE FACTORY SERVICE.
Model 2B’s have a “B” after the serial number, in production 1979-1980.
-Model 2C’s have a “C” after the serial number, in production 1980-1989.
-Model 2Ci’s have a “Ci” after the serial number, in production 1989-1991.
-Model 2Ce’s have a “Ce” after the serial number, in production 1991-2001.
-Model 2Ce Signatures have a “Ce” after the serial number plus Richard Vandersteen’s signature on the panel, in production 2001-2007.
-Model 2Ce Signature II Anniversary has an “II” after the serial number plus Richard Vandersteen’s signature, in production 2007-2020.
_Model 2Ce Signature III Contour knobs on the back are removed. Back panel says Signature III 2020-
-Model 3’s has a serial number without a letter, in production 1990-1995.
-Model 3A’s have an “A” after the serial number, in production 1995-2001.
-Model 3A Signature's have an “A” after the serial number plus Richard Vandersteen’s signature, inproduction 2001-
-Model Treo’s have a serial number but no letter after, in production 2011-2014.
-Model Treo CT’s have “CT” on the rear plate near Treo, in production 2013-
-Quatro Fab’s have a serial number but no letter, in production 2003-2010.
-Quatro Wood’s have wood veneer with no other identification, in production 2006-2013.
-Quatro Wood CT’s have a “CT” near Quatro, in production 2013-
-Model 5’s has a serial number but no letter, in production 1996-2004.
-Model 5A’s have an “A” after the serial number, in production 2004-2012.
-Model 5A Carbon’s have “CT” stamped on the plate, in production 2012-2020.
-Model KĒNTO Carbon have a serial number but no letter, in production 2019-
-Model Seven’s has a serial number no other identification, in production 2010-2015.
-Model Seven Mk II’s have a serial number with Mk II after Model Seven, in production 2015-2022
-Model Seven XTRM have XTRM under Model Seven on backplate, side-firing CounterforceTM woofers, in production 2021-
-Model 2W’s have a serial number, in production 1983-1999. Avoid early versions with a flat plate amplifier with rectangular slots across the top and bottom.
-Model 2Wq’s has a serial number and a “Q” control, in production 1999-2018.
-Labeled as such, in production 2018-
