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It´s very very nice manual with all, what i need. Original in good quality. Very fast business. Very much thanks...
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Purchased the manual that I was looking for at a great price and could download it easily.. Great service experience and for future purchases I plan to use the site.
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Exactly what was needed to assess the product - excellent value and great service
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A site where discontinualed schematic diagrams and back dated information can be found on discontinued radios tv's and any electronic equipment can be found. Newer manuals either Service and operating manuals. Radio amateurs should find this site a great source for ham radio equipment manuals. I will return to this site should I need information on any electrical equipment. priced easy to download in a PDF format and print pages need to undertake the repair.
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Quality scan of the original. All the detail necessary to troubleshoot, repair and adjust the unit. I'm sure I will be downloading more manuals in the future as the need arises.
Technical Manual
QB
Quantum Series 3-Way Speaker
SPECIFICATIONS
ACOUSTIC & ELECTRICAL SPECIFICATIONS:
Nominal Impedance: Power Rating: Sensitivity: Crossover Frequencies: Frequency Response: Horizantal Dispersion: 4 ohms 15-150 watts RMS 89dB @ 1 watt, 1 meter 600Hz and 4,000Hz 42Hz-32,000Hz +/-3dB -2dB at 60°, left or right (20kHz)
PHYSICAL SPECIFICATIONS:
1x - EMIT Tweeter 1x - 4" (10.1cm) Midrange 1x - 10" (25.4cm) Q-Woofer Dimensions: 25"H x 14.5"W" x 12"D XXXXXXXXXXXXXXXX XXXXXXXXX63.5cm(H) x 36.8cm(W) x 30.5cm(D) Cabinet Not Sold Grille #A025-038 Crossover NLA Tweeter Level Control #145-0103 Midrange Level Control #145-0103 Logo #716-0319
PRODUCTION HISTORY
Introduced in 1978 Discontinued 1983 Original Retail Price: $396.00/pair
TECHNICAL INFORMATION
EMIT TWEETER #902-0221 TWEETER DIAPHRAGM #751-3722
4" MIDRANGE #902-1166 Substitute #902-0179 10" WOOFER #902-2128 Sustitute #902-2864
FUSE
Original 2� 5W Substitue 5� 5W
BLU/BLK
6.8µF
1.25A AGC
TWEETER
BLUE
12.5µF
1.0mH AIR CORE
5� 5W
WHT/BLK
INPUTS
8.1�
MIDRANGE
WHITE RED
1.5mH IRON CORE
WOOFER
RED/BLK
REV A
7-98
INFINITY SYSTEMS INC., 250 Crossways Park Drive, Woodbury, New York 11797
QB Quantum Series 3-Way Speaker
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