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Cornwall History


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History of the Klipsch Cornwall, Cornwall II, Cornwall III


This is a timeline for the evolution of the Klipsch Cornwall speaker from inception in 1959 to the current date.
Date Event Media

October 1959

The Cornwall is introduced as the world's second commercially produced center
speaker. A speaker with higher output capability than the Heresy was needed
when used in three speaker arrays between Klipschorns®. Component
designations: Woofer EV 15WK, Midrange K-1000 Horn and University SAHF
Driver, Tweeter K-77
Late 1959

Transition to the K-33-J Woofer (Jensen)

1959-1961

Sporadic transition to the K-55-V mid-range driver (Atlas).

January 1963

The K-1000 diffraction type midrange horn was replaced with the exponential
K-600 horn with a lower (600 Hz) cutoff

September 1967

Transition to the K-33-M. The records are not clear as to the origin of this
driver but it is believed to be an Eminence driver with an Alnico magnet.

January 1968

Transition to The K-33-P Woofer (CTS Paducah KY)
1974

  • The horizontal version of the Cornwall is discontinued.

  • K-56 mid-range driver (Electrovoice 1828) is used for a short period as a
    temporary replacement as the supply of K-55-V drivers was interrupted.

1975

Transition to The K-33-B Woofer (CTS Brownsville TX)

1975-1879

K-33-E (Eminence) and the K-33-B were used interchangeably. The records
are not specific about the actual start date for the K-33-E but it is believed to
be in the early to mid 1970's

1979

The Eminence K-33-E woofer is used exclusively
June 5th, 1981

The updated B2 network, with steeper crossover slopes is phased in with no
changes to the K-33-E, K-55-V and K-77-M driver compliment.
October 19th, 1981 - March 1983

The transition between four different iterations of the midrange driver from
revolving sources occurs during this period. The original K-55-V was changed
to a K-51-V (10/19/81) This marked the first time in the Cornwall's history
that it used a driver set that differed from that of the Klipschorn®. The K-51-V
was then changed to the to the K-55-G (essentially a ceramic magnet version
of the Atlas Alnico K-55-V). The K-55-G was then changed to the Hepner built
K-52-H and finally the Klipsch built K-52-K.
March 14th, 1983

The B-3 network and the K-52 midrange driver starts to be used in this model.
Component designations were: Woofer Eminence K-33-E, Midrange K-57-K (K-
600 Aluminum horn and K-52-K driver with snout), Tweeter K-77-M and B-3
network.
January 1986

The Cornwall II is introduced featuring front mounted drivers to reduce baffle
induced diffraction effects. Component designations were: Woofer Eminence K-
34-E (K-33-E with a dressy pad ring), Midrange K-57-K (K-601 plastic horn
and K-52-K driver), Tweeter K-79-K (K-75-K horn and K-79 driver) and CW II network.
1990

The Cornwall II is discontinued.
March 2006

The Cornwall III is introduced marking the end of the Cornwall's 15 year
absence from the market. This version utilizes the Klipschorn® woofer, the
horn and driver set from the Heresy III (featuring Titanium diaphragms and a
® tweeter horn) and bi-wire inputs. Component designations are:
Tractrix
Woofer K-33-E, Midrange K-53-Ti (K-701 horn and K-53-Ti driver), Tweeter K-
107-Ti (K-79-T horn and K-100-Ti driver).


Information originally provided by Jim Hunter and Mark Kauffman of Klipsch Audio Technologies, LLC















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I compared a K-75-K tweeter lens to a K-79-K lens and to my tired eyes they look identical in size and profile. I would imagine that since the Tractric profile opens up faster than an exponential profile that a Tractrix horn would be a little shorter in length. Does anybody here have a new Heresy lll (which uses the tractrix tweeter) as well as a K-79-K tweeter horn and could you post side by side photos so we can see the difference between the two?

Is there anybody in Calgary with the Tractrix tweeter in either a Heresy lll or a Cornwall lll as I would like to have a look and especially a listen to them to see if there is much of a difference. I could bring over a set of K-79-K with Titanium diaphragms installed for a direct comparrison. Send me a PM if you are interested.

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