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Just looked at the LaScala II page on the Klipsch website and it says "The original La Scala was unveiled in 1963 and named after the Teatro alla Scala in Italy. Cosmetically improved over the years, the La Scala II provides Klipschorn-like performance from a smaller cabinet that does not require corner location."

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Chorus

https://web.archive.org/web/20090619155856/http://www.klipsch.com/na-en/products/chorus-specifications/

 

FREQUENCY RESPONSE 45Hz-20kHz(+-)3dB
POWER HANDLING 100 watts maximum continuous (1000 watts peak)
SENSITIVITY 101dB @ 1watt/1meter
NOMINAL IMPEDANCE 8 ohms
CROSSOVER FREQUENCY HF 7,000 Hz
LF 650 Hz
TWEETER K-79-K 1" (2.54cm) Phenolic diaphragm compression driver
HIGH FREQUENCY HORN 90(o)x40(o) Exponential Horn
MIDRANGE K-57-K 1.5" (3.81cm) Phenolic diaphragm compression driver
MID FREQUENCY HORN 90(o)x40(o) Exponential Horn
WOOFER K-48-E 15" (38.1cm) Fiber-composite cone
ENCLOSURE MATERIAL Medium density fiberboard construction (MDF)
ENCLOSURE TYPE Bass reflex via fonrt-mounted port
DIMENSIONS 39" (99.06cm) x 18.5" (46.99cm) x 15.5" (39.37cm)
WEIGHT 89 lbs. (40.4kg)
FINISHES Walnut Oil, Walnut Lacquer, Oak Oil, Oak Lacquer, Finished Black
BUILT FROM 1987
BUILT UNTIL 1990
 
Chorus II
 
SPECIFICATIONS
BUILT FROM: 1990
BUILT UNTIL: 1996
CROSSOVER FREQUENCY: HF 5,000 Hz<br>LF 600 Hz
DIMENSIONS: 39" (99.06cm) x 18.5" (46.99cm) x 15.5" (39.37cm)
ENCLOSURE MATERIAL: Medium density fiberboard construction (MDF)
ENCLOSURE TYPE: Bass reflex via passive radiator
FINISHES: Walnut Oil, Oak Oil, Oak Clear, Finished Black
FREQUENCY RESPONSE: 39Hz-20kHz(+-)3dB
HIGH FREQUENCY HORN: 90(o)x40(o) Exponential Horn
MAX ACOUSTIC OUTPUT: 121dB SPL
MID FREQUENCY HORN: 90(o)x40(o) Tractrix® Horn
MIDRANGE: K-61-K 1.5" (3.81cm) Phenolic diaphragm compression driver
NOMINAL IMPEDANCE: 8 ohms
POWER HANDLING: 100 watts maximum continuous (1000 watts peak)
SENSITIVITY: 101dB @ 1watt/1meter
TWEETER: K-79-K 1" (2.54cm) Polymer diaphragm compression driver
WEIGHT: 89 lbs. (40.4kg)
WOOFER: K-48-E 15" (38.1cm) Fiber-composite cone active / KD-16 15" (38.1cm) Fiber-composite cone passive
Edited by mustang guy
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I know you've showed me these specs before but for some reason I have it stuck in my head that the original Chorus with the k-600 mid horn was crossed over at 600hz and when they switched to the newer Tractrix horn in the Chorus II they upped the mid band to 650hz, same as the Forte II and Quartet? If you look at the specs for the Forte II and Quartet the mid frequency response is 650hz - 7000hz. It just doesn't make sense to me but maybe I'm wrong?

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This doesn't answer the crossover freq question.

 

But:

 

It is interesting to look at the crossover schematics for the Forte, Forte II, Chorus, and Chorus II.

 

All are somewhat different in the midrange and elsewhere.

 

Generally, the Forte and Forte II use a first order scheme while the Chorus and Chorus use a second order (or so) by means of the inductor . . . and also use a resistor.

 

The model of autotransformer is different in the units.

 

The Chorus schematic is rather dim and I can't determine whether the output is inverted or not. The acoustic output of the drivers are often not totally in phase at the crossover point and there is a choice of whether a dip due to this can be solved, or partially solved, by inversion. 

 

Overall, it seems to me that a fair amount of redesign was done as these four cousins progressed.  The FR of the curves reaching the drivers are going to be different a bit and therefore the crossover freqs can be different, if slightly.

 

WMcD

Edited by WMcD
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  • 2 years later...
On 15.4.2016 at 1:53 AM, mustang guy said:

Chorus

https://web.archive.org/web/20090619155856/http://www.klipsch.com/na-en/products/chorus-specifications/

 

FREQUENCY RESPONSE 45Hz-20kHz(+-)3dB
POWER HANDLING 100 watts maximum continuous (1000 watts peak)
SENSITIVITY 101dB @ 1watt/1meter
NOMINAL IMPEDANCE 8 ohms
CROSSOVER FREQUENCY HF 7,000 Hz
LF 650 Hz
TWEETER K-79-K 1" (2.54cm) Phenolic diaphragm compression driver
HIGH FREQUENCY HORN 90(o)x40(o) Exponential Horn
MIDRANGE K-57-K 1.5" (3.81cm) Phenolic diaphragm compression driver
MID FREQUENCY HORN 90(o)x40(o) Exponential Horn
WOOFER K-48-E 15" (38.1cm) Fiber-composite cone
ENCLOSURE MATERIAL Medium density fiberboard construction (MDF)
ENCLOSURE TYPE Bass reflex via fonrt-mounted port
DIMENSIONS 39" (99.06cm) x 18.5" (46.99cm) x 15.5" (39.37cm)
WEIGHT 89 lbs. (40.4kg)
FINISHES Walnut Oil, Walnut Lacquer, Oak Oil, Oak Lacquer, Finished Black
BUILT FROM 1987
BUILT UNTIL 1990
 
Chorus II
 
SPECIFICATIONS
BUILT FROM: 1990
BUILT UNTIL: 1996
CROSSOVER FREQUENCY: HF 5,000 Hz<br>LF 600 Hz
DIMENSIONS: 39" (99.06cm) x 18.5" (46.99cm) x 15.5" (39.37cm)
ENCLOSURE MATERIAL: Medium density fiberboard construction (MDF)
ENCLOSURE TYPE: Bass reflex via passive radiator
FINISHES: Walnut Oil, Oak Oil, Oak Clear, Finished Black
FREQUENCY RESPONSE: 39Hz-20kHz(+-)3dB
HIGH FREQUENCY HORN: 90(o)x40(o) Exponential Horn
MAX ACOUSTIC OUTPUT: 121dB SPL
MID FREQUENCY HORN: 90(o)x40(o) Tractrix® Horn
MIDRANGE: K-61-K 1.5" (3.81cm) Phenolic diaphragm compression driver
NOMINAL IMPEDANCE: 8 ohms
POWER HANDLING: 100 watts maximum continuous (1000 watts peak)
SENSITIVITY: 101dB @ 1watt/1meter
TWEETER: K-79-K 1" (2.54cm) Polymer diaphragm compression driver
WEIGHT: 89 lbs. (40.4kg)
WOOFER: K-48-E 15" (38.1cm) Fiber-composite cone active / KD-16 15" (38.1cm) Fiber-composite cone passive

Chorus II

It seems like Klipsch has wrong value on HF value CROSSOVER FREQUENCY: HF 5,000 Hz<br>LF 600 Hz !

Right value on HF is 6000 Hz

Edited by raeggis
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