What is stereo?

There are now two system of high fidelity, monophonic (monaural) and stereophonic. Monophonic is a system that starts from one microphone and is fed through a single high fidelity set. Stereophonic is a double system. Two separate microphones are placed at different sides of the orchestra and two different systems are used to keep the two signals or channels separated. Two separate speakers are used, placed on different sides of you room. Stereo is much like 3-D photography, two slightly different sound reach your ears giving you a new dimension in sound.

H.H. Scott '59

Cizek Model One

 The sound of Cizek,a brave new world in loudspeakers technology.
Brave, because we dared to embark on a complex journey into the center of sound. A journey destined to explore each element of sound reproduction, to seek out imperfection and institute change.
But mere change was not enough. At Cizek Audio Systems, we found it necessary to go beyond refinement to the point of creation. Creation which resulted in 8 new patents to bring you closer to sound at its source. Sound rated by the experts to be superior to loudspeakers selling for many times the price.
Yet Cizek's primary breakthrough lies in a crossover network that eclipses all others. A system so precise, so accurately formulated, that we can guarantee response specifications to withhin ±1 dB. Combined with a power handling capability of 15 to 150 watts per channel, this full range, 2-way acoustic-suspension loudspeaker yields a frequency curve that is exceptionally flat from 35 Hz - 18 kHz.
And for superior fine tuning, the Cizek loudspeaker features three individual frontal controls. These adjustments are specifically engineered to balance the sound to the acoustics of your room, simulate concert hall conditions, and incrase bass response if you so desire.
Come compare, and you'll discover our breave new world in loudspeaker technology.
Cizek - making footprints in the sounds of time.

 In our design we have minimized the diaphragm excursion of the high frequency driver in the region of crossover in order to lower distortion and increase power handling capability.
By not using a deep front edge we have minimized the effects of diffraction from the front edge terminations. We use an acoustically transparent foam grille.
To maintain a high standard of quality control, we found it necessary to design and manufacture our own 10" woofer. Incorporating a heavy 1kg (2,2 lb) ceramic magnet, this woofer produces an air-gap flux-density of approximately 13 kilogauss. For increased power handling capability, we employ a long 2-layer, 1½" (38 mm) diameter voice coil wound with #28 wire. In order to assure extended deep bass response with minimal distortion, the woofer was designed with a free-air resonance of nominally 16 Hz, so that in the total suspension stiffness is contributed by the air that is sealed inside the cabinet.
The three controls, located in the recessed panel below the woofer on the front of the loudspeaker, allow unusual flexibility. The High Frequency Contour Control (H.F.C.) is a 5-position switch which allows you to introduce a variable "rolling-off" of the high frequencies. The High Frequency Level Control (H.F.L) allows you to raise and lower the entire response of the tweeter with respect to the woofer. The Q switch allows you to change the Q from .6 to 1.
Input terminals are equipped for standard double-banana connection.

 Special Features
Cabinet is internally braced to minimuze panel resonance.
Cabinet is sealed so that we have a minimum return time of four seconds on the woofer to extend the low frequency response and minimize the adverse effects of turntable rumble.
Through a unique design our crossover combines the advantages of a first-order constant-voltage-transfer network with the advantages of higher order networks.
To avoid distortion due to core hysteresis and saturation, the crossover choke is wound air-core with 17-gauge wire.
Crossover circuit utilizes all 5% or better tolerance components.

System:  2-way acoustic suspension system
Drive units
1 x 254 (10") acoustic suspension woofer
1 x 25,4 (1") hemispherical dome tweeter
Crossover Frequency:  1,500 Hz acoustical and electrical
4,25 ohms ±.25 ohms from 100Hz to 15kHz with controls in Flat position and Q adjustment in .6 position; 7,25 ohms with Q in the 1 position
Efficiency: Average sensitivity is 88 dB at 1m with 1watt input into 4,25Ω
Minimum Power requirements:  15 watts RMS into 4Ω
Power Handling:  Up to 150 watts music power per channel
In-box Resonance:  Nominally 38 Hz
Low-frequency Response:  Flat at 38 Hz or -4 dB (dependant upon Q adjustment)
Response:  35 Hz - 17 kHz, +1½ dB, -2 dB (measured outdoors in a 2π environment)
System Q:  .6 or 1
Flux Density:  13,000 gauss (woofer); 15,000 gauss (tweeter)
Volume of Enclosure:  39,6 liters (1,4 cu ft)
Cabinet Dimensions (H x W x D):  635 x 394 x 241 mm (25" x 15½" x 9½")
Weight Net:  19,4 kg (42,8 lb)

Nessun commento:

Posta un commento