Assessments - 1, GPA: 3
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This 'systems engineering' approach involved extensive research to meet design goals for specific Thiele-Small parameters that would offer the user a wide range of choice of low frequency response, efficiency and compact size. Successful completion of this development program has resulted in a family of bass reflex cabinets from the compact 1,5-cubic foot Model 8127, to the 24-cubic foot Model 8182, which is used for extended low frequency response. Careful vent design provides sufficient cross-sectional area to achieve laminar flow for all conditions; this assures proper operation even at maximum acoustic sound power levels. Construction of each enclosure utilizes high quality 7-ply birch-face plywood. Extensive internal bracing maximizes rigidity and strength. The mar resistant textured gray spatter finish assures high durability. All in all, the eight enclosures of the 8000 Series family, in conjunction with the 3000 Series low frequency loudspeakers, offer the user a wide choice of performance criteria while assuring smooth frequency response and low distortion at all sound pressure levels. A 8000 SERIES LOUDSPEAKER SYSTEMS SPECIFICATIONS 8124 8127 8227' 8154 8156 8256' 8184 8182 Type: vented vented vented vented vented vented vented vented Speakers Included 3124 3127 3127 (2) 3154 3156 3156 (2) 3184 3182 Sensitivity in dB SPL—2 4 feet: 91 95 98 93 98 100 96 91 1 meter: 93 97 100 95 100 102 98 93 Maximum SPL 4 feet 112.5 117 122 115 119 122 117 113 1 meter 114 119 124 117 121 124 119 115 Internal Volume: 3 ft3 1.5 ft3 3 ft3 6 ft3 3 ft3 6 ft3 12 ft3 24 ft3 Tuning (FB): 38 Hz 77 Hz 77 Hz 32 Hz 57 Hz 57 Hz 39 Hz 20 Hz F3: 40 Hz 70 Hz 70 Hz 40 Hz 65 Hz 65 Hz 40 Hz 23 Hz Construction3: 7-ply 7-ply 7-ply 7-ply 7-ply 7-ply 7-ply 7-ply Finish4: gray gray gray gray gray gray gray gray Dimensions— Height: 30" 19" 30" 36" 30" 36" 36" 54" 76.2 cm 48.3 cm 76.2 cm 91.4 cm 76.2 cm 91.4 cm 91.4 cm 137.2 cm Width: 19" 16" 19" 30" .. 19" 30" 30" 36" 48.3 cm 40.6 cm 48.3 cm 76.2 cm 48.3 cm 76.2 cm 76.2 cm 91.4 cm Depth: 143A" 143A" 143/4" 143/4" 1 143A" 143/4" 26’A " 261A" 37.5 cm 37.5 cm 37.5 cm 37.5 cm 37.5 cm 37.5 cm 66.7 cm 66.7 cm Weight: 60.5 lbs 42 lbs 78 lbs 90 lbs 61.5 lbs 106 lbs 124 lbs 170 lbs 27.5 kg 19 kg 35 kg 41 kg 28 kg 48 kg 56 kg 77 kg 1 Dual loudspeaker system. Sensitivity and maximum SPL includes 3 dB gain due to loudspeaker coupling. 2 Measured with 1 watt (E x I) input of band-limited pink noise from 100 Hz to 1 kHz at 1 meter. 3 7-ply birch face plywood. Acoustically braced on all sides, except for small 1.5-cubic foot unit. Incident sides lined with fiberglass except for Model 8182. 4 Mar (scuff) resistant textured gray spatter for high durability. The response and impedance of each system are published with the specifications for the 3000-series loudspeaker used in the system. ALTEC LANSING P.O. BOX 26105, OKLAHOMA CITY, OK 73126-0105, U.S.A. ©1989 ALTEC LANSING CORPORATION PRINTED IN U.S.A. 6/89 — 2M Revision 5 AL-2527 42-07-027090...