Klipsch

Heresy I

Speaker

Main Details
Maker Klipsch Brand
Function
Channels/Tracks
  • 3 × Voice
Form Factor Floorstanding
Made In USA
Date Produced 1967-1985
Notes History and Content of Klipsch H-700 / Heresy 1
2/25/2005 MK

Klipsch H-700 / Heresy I
 Production Dates: Approximately 1967 thru 1985. The H-700 and the Heresy are the same speaker with a name change. The date of the name change is unknown to us at this time without time consuming research of old, poorly organized records. It is believed to have changed in the early 1970s
 Dimensions: Approximately the same as current Heresy II
 Weight: Somewhat less than the current Heresy II which is made of veneered MDF. The H700 and the Heresy used Birch plywood for the unfinished versions and veneered lumber core for the finished models. Both materials are somewhat lighter than MDF.
 Impedance: Same as today 8 Ohm nominal. 16 Ohms was stated at the time due to a different measurement technique
 Power handling:It was rated at 25 watts at the time but the testing procedure was very different than it is now so it's difficult to draw a comparison. I have information from later production that states 105 watts which also suggests improvements in power handling due to new types of high temperature resistant adhesives used in the construction of the later drivers.
 Sensitivity dB: Approximately the same as today 96dB 1W / 1M
 Network: See attached schematic of the Type E network. Several versions were used during the production run, Type C, Type E and Type E2 but the basic design remained the same.
 Type of components of network (caps oil and paper; choke coil): Typically oil type caps and iron core inductors

Woofer
 Type and name of woofer; K-22
 Power handling; 100 continuous
 BxL; 14.0 TM
 Sensitivity; SPLo = 93.27dB (o= 1.34% / @ Eg=2.83v)
 Impedance; Znom= 8.0 ohm
 Voice coil diameter; 2”
 Material of cone; Pulp
 Material of suspension; Treated cloth
 Material of magnet; First versions were Alnico then were changed to Ferrite/ ceramic in the mid 1970’s.

Midrange horn
 Type and name of midrange horn; K-700
 Material; Cast aluminum
 Vertical dispersion; 40 degrees
 Horizontal dispersion; 90 degrees

Midrange driver
 Type and name of midrange driver; K-55-V
 Power handling; 30 watts continuous
 Sensitivity; 107 dB
 BxL; Unknown
 Impedance; 10 Ohm DCR / 16 Ohm Nominal
 Voice coil diameter; 2” Dia
 Material of diaphragm; Phenolic
 Material of magnet; Alnico

Tweeter
 Type and name of tweeter; K-77
 Type and material of horn; Cast Zinc
 Power handling; 10 watts
 dB; Approximately 105 dB
 BxL; Unknown
 Impedance; 6.1 DCR / 8 Ohm nominal
 Voice coil diameter; 1” Dia
 Material of diaphragm; Phenolic
 Material of magnet; First versions were Alnico then were changed to Ferrite / ceramic in 1979.

The original Type H, that used the K-1000 midrange horn (which preceded the H-700 / Heresy I) was conceived as the original center channel for the Klipschorn.

Difference between the H-700 and Heresy: It was just a change in name or designation. There were small changes in the drivers and network part values but the basic configuration remained unchanged from 1967 to 1985.

Heresy I production dates: Unknown at this time. It is believed to have changed in the early 1970s

Difference in price of one pair of H-700 / Heresy I’s at the beginning and at the end of production;
$188.00 ea to $225.00 ea in 1967 depending upon cabinet finish at the start of production. I don’t have a price sheet from the year (1985) when we transitioned from the Heresy I to the Heresy II. I do have one from 1987 and the Heresy II ranged from $370.00 ea to $455.00 ea depending on finish and riser options

Difference from Heresy one and Heresy II;
 Cabinet: Non removable back panel, the drivers are front mounted in step routes on the baffle instead of rear mounted.
 New woofer K-24 (originally built by Klipsch), similar to the K-22 but a revised design. Subsequently sourced from an outside supplier
 New midrange driver, K-53 (originally built by Klipsch), similar to the K-55 but a revised design. Subsequently sourced from an outside supplier
 New Tweeter, K-76 (originally built by Klipsch), Quite different from the K-77 in design. Subsequently sourced from an outside supplier
 New network to match all of the new drivers using binding posts mounted on an input cup, and film capacitors and inductors mounted on a PCB

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