Infrequent Sound [sex.tex] technology: Mitchell Acoustics Research Frazier CAT40 model number F1482 [White] 2-Way 8" Coaxial Loudspeaker [complete restoration], 1986, made in USA

Mitchell Acoustics Research Frazier CAT40 model number F1482 [White] 2-Way 8" Coaxial Loudspeaker [complete restoration], 1986, made in USA

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Link: frazierspeakers | specifications [Eng, PDF] | Coaxial Loudspeakers: Separating Facts from Hype | audiokarma

The CAT 40 is one of the most versatile and transparent-sounding loudspeakers available. Its compact size, unequalled transient accuracy, and well-behaved directivity place it in a class of one.

Features
Complete Full Range Loudspeaker
Controlled Directivity (90ox90o)
High Power Handling - 100 Watts A.E.S.
Ferrofluid Cooled High Frequency Voice Coil

Factory Options
• Oak, Walnut, Carpet or White • Protective Metal Grille
• Transformer
• Ceiling Baffle

ARCHITECTS and ENGINEERS' SPECIFICATION

The loudspeaker shall be a coaxial system consisting of an eight in woofer assembled in a vented enclosure of optimum size and porting to produce a flat low frequency response to 70 Hz. The woofer assembly will also directly couple a conic horn section. A high frequency horn assembly consisting of a magnetic fluid cooled one inch dome type driver, is mounted inside the larger horn such that both are aligned. The system shall produce an amplitude response that is plus or minus 3 dB from flat in the frequency range of 70Hz to 17kHz. The off-axis amplitude response shall deviate by no more than plus or minus 5dB over the frequency range 70 Hz to 10kHz at any angle less than 45 degrees from the loudspeaker axis. The loudspeaker shall be capable of providing 112dB SPL at a distance of one meter with no morethan85wattselectricalinputpower. Allenclosurewallsshall be 5/8" MDF and all wall joints shall employ lock-miter joinery. The maximum dimensions shall be 17-5/8 inches by 17-5/8 inches by 8-7/ 8 inches in depth. Maximum weight shall be 34 pounds. The loud- speaker system shall be a Frazier CAT 40.

Power Consideration-sThepowerrating usedfortheCAT40 isderived by direct experimentation as specified by the Audio Engineering Society (AES2-1984).Fullbandwidthpinknoisesignal isfilteredtomatchthedevice bandwidth. This signal is also processed by means of a clamping network to ensure a 2:1 (6dB) crest factor. The signal is applied to the loudspeaker for a 2 hour period. All appropriate parameters are checked after this exercise to ensure proper performance. The power rating is set as the upper limit of safe operationandisdeterminedbyevaluatingtheRMSvoltageappliedduringthe test and the minimum impedance of the loudspeaker. Thus, the power rating =V2rms/Znom. This test is run on several production units to ensure valid representation of the product.

The Frazier CAT 40 is designed for use in a broad range of demanding applications. The CAT 40 makes use of Coincident-Aligned Transducers in a compact system consisting of an eight inch heavy duty woofer in a conic horn- loaded bass reflex enclosure. A high frequency horn with ferrofluid cooled driver is mounted coaxially in front of the woofer. An internal passive network provides crossover, equalization and signal alignment, resulting in acoustic characteristics which are responsible for the CAT 40's real performance advantages: extremely flat amplitude response both on and off axis, uniform directional behavior, and point imaging. In addition, the rapid falloff beyond pattern provides excellent gain before feedback. The beamwidth of the low and high frequency sections is very closely matched throughout the crossover region, eliminating crossover dropout and lobing off axis. The directional behavior of the CAT 40 allows optimal interaction of multiple units when properly arrayed.

Specifications
System Type: Two-way Coaxial

Frequency Response: 70Hz - 17kHz
Power Handling: 100 Watts (AES)
Sensitivity (2.8v/1m): 95 dB SPL

Impedance (Nominal/Minimum): 8Ω/6.8Ω @83Hz

DC Resistance: 5Ω

Components: HF driver, LF driver
Internal Crossover Frequency: 2kHz

Input Connection: Screw Terminal Cup
Weight: 15,4 kg / 34 lb

Dimensions: 17 -5/8" x 17-5/8" x 8-7/8"
Construction: Med Density Fiberboard
Finishes: Black or White Textured, Oak or Walnut Veneer, Antiscuff
Directivity (Octave Averaged):
Frequency | Coverage | Q

500Hz. | 120°x120° | 4.9
1kHz | 75°x80° | 12.8

2kHz | 90°x90° | 10.9

4kHz | 60°x90° | 12.8

8kHz | 94°x62° | 11.4

Model Numbers:
CAT 40 - Black: F1480
CAT 40 - White: F1482
CAT 40 - Oak: F1483
CAT 40 - Walnut: F1484
CAT 40 - Antiscuff: F1485

Drawings and additional data available on request.