Altec Lansing AB8500 User's Manual
Contents
1. ALT EC LANSING AB8500 AcoustaBASS Low Frequency System High Power Handling High Efficiency Extended Response Compact Size Enclosure Allows Refinishing KEY SPECIFICATIONS System Type Direct radiating vented low fre quency loudspeaker system Pressure Sensitivity 101 dB SPL 1 w 100 Hz to 800 Hz re 20 uPa see note 1 Frequency Response 46 Hz to 3 500 Hz see Figure 1 Note 2 800 watts AES method 800 watts EIA RS426A Power Handling 50 Hz to 500 Hz see note 3 Maximum Long Term Qutput 800 watts input 1 m re 20 uPa see note 4 127 5 dB Impedance 3 8 ohms minimum 40 Hz 4 0 ohms nominal Components Two 15 inch 38 1 cm low frequency loudspeaker DESCRIPTION The Altec Lansing AB8500 is a member of the AcoustaBASS family of low frequency enclo sures The AB8500 is a direct radiating vented de sign and provides high efficiency low distortion and excellent low frequency performance in a relatively small enclosure The AB8500 employs dual long throw 15 inch 38 1 cm loudspeakers in a 7 4 ft 209 5 L enclosure The Enviro board enclosure is finished in beige with matching fabric arille Con nections are made via barrier strip 10 recessed into the back of the enclosure on a durable molded connector panel The enclosure is constructed from Enviro Board a composite structural material which is easily refinished see Finishi2. 2 0 Ibs 55 5 kg Accessories ASK 100 mounting kit ASK 300 mounting kit Altec Lansing continually strives to improve prod ucts and performance Therefore specifications are subject to change without notice NOTES ON MEASUREMENT CONDITIONS 1 Pink noise signal one Watt calculated using E Zmin 3 16 meter measurement distance referred to one meter 2 On axis one Watt calculated using E Zmin 3 16 meter measurement distance referred to one meter low frequen cies corrected for anechoic chamber error 3 This system rating patterned after the AES method for indi vidual driver where the test signal is pink noise with a 6 dB crest factor over the bandwidth of the system with power calculated using the E Zmin for two hours 4 This measurement made under the same conditions as Pres sure Sensitivity but at rated power and takes into account any power compression effects due to non linearities in the system 5 The loudspeaker should be connected to the 8 ohm 4 chm tap on amplifiers using transformer coupled output sections 6 Distortion components invalid above 10 kHz The distortion at any given frequency may be found by graphically taking the difference between the fundamental and harmonic and adding the number of Decibels which the harmonic has been raised on the graph and apply the formula distortion L00 x TOU suere eB FINISHING ENVIRO BOARD Finishing Enviro Board is simple and straight forward a
3. 43 2 cm 24 0 inches 61 0 cm 20 4 inches 51 8 cm 34 0 inches 86 4 cm ARCHITECT S AND ENGINEER S SPECIFICATIONS The loudspeaker shall be a low frequency bass reflex design consisting of dual long throw high effi ciency 15 inch 38 1 cm woofer front mounted in a 7 4 tt 209 5 L enclosure The loudspeaker shall meet the following design criteria Power handling 800 Watts of pink noise with 6 dB crest factor band width limited from 50 Hz to 500 Hz Frequency re sponse smooth and uniformly usable at high output levels from 46 Hz to 3 500 Hz Pressure sensitivity 101 dB SPL at one watt 100 Hz to 800 Hz mea sured at a distance of one meter on axis Impedance 4 0 ohms nominal 3 8 ohms minimum Directivity pattern 110 horizontal by 50 vertical at 500 Hz The enclosure shall be constructed from hardwood composite material and damped with sound absorb ing glass wool The enclosure can be finished using commonly available paints and stains to match any decorative environment The enclosure and cloth grille shall be finished in beige The dimensions shall be 34 0 inches 86 4 cm high by 24 0 inches 61 0 cm wide by 20 4 inches 51 8 cm deep The loudspeaker system shall weigh 108 0 Ibs 49 0 kg The low frequency loudspeaker system shall be the Altec Lansing AcoustaBASS series AB8500 LANSING a MARK IV company P O BOX 26105 e OKLAHOMA CITY OK 73126 0105 U S A Phone 405 324
4. 5311 or FAX 405 324 8981 1994 ALTEC LANSING CORPORATION PRINTED IN U S A 3 94 Revision 2 42 07 038250 531548
5. en developed and is fully integrated with the ASK family of hanging hardware Each ASK kit consists of a steel tube two brackets two eye bolts and fasteners The Altec Lansing contractor installs the ASK by drilling two holes into the enclosure in predetermined posi tions and assembling the ASK kit Full instructions are included with each ASK kit and a template is packed with the AB8500 to show the location of the holes A single AB8500 requires a single ASK 300 to sus pend it horizontally or a single ASK 100 to suspend it vertically While each AB8500 requires two ASK 100 horizontal or two ASK 300 vertical if mul tiple cabinets are suspended up to a maximum of 3 Full attention should be given to the instructions and limitations in the ASK instruction sheet FREQUENCY Hz Dispersion Angle Figure 3 Frequency Response Figure 2 x Ae L SN b SN d CS E ME NG Q and Directivity Index Figure 5 Magnitude of Impedance Figure 4 AN x SM ASS PN E c 4s CN 4 b IXS Mii f EN wo ap 33431 34n553Hd ANNOS HORIZONTAL VERTICAL FREQUENCY Hz Harmonic Distortion at 0 1 Rated Power Figure 7 Harmonic Distortion at 0 01 Rated Power Figure 6 Figure 1 1 3 Octave Polar Responses Center of Gravity A 9 4 inches 23 9 cm B 17 0 inches
6. ng Enviro Board Enviro board is made of layered and selectively ori ented hardwood strands strongly bonded together within a phenolic resin matrix The surface is a proprietary vinyl laminate especially formulated for Altec Lansing which can be painted or stained to match any decorative environment The AcoustaBASS series of low frequency en closures are ideally suited for any installation where high quality sound is required and in permanent in stallations for houses of worship auditoriums and arenas The AB8500 combines well with both the Mantaray and Vari Intense series of horns The enclosures may be stacked for areater output capability or for a narrower vertical beamwidth Every time the number is doubled approximately 6 dB in output is gained 3 dB for double power handling and 3 dB for the resultant higher Q SPECIFICATIONS continued Screw terminals 810 32 on barrier strip will accept 0 4 inch 1 0 cm wide spade lug Input Connection Recone Kit Model R4500 Replacement Woofer Model AB4500 RLF Replacement Grille Model RG8500 Enclosure Vented design for optimum re sponse Constructed of 0 7 inch 1 8 cm Enviro Board a compos ite refinishable structural material Finish Enclosure Wood grain beige Grille Cloth Beige Dimensions Height 34 0 inches 86 4 cm Width 24 0 inches 61 0 cm Depth 20 4 inches 51 8 cm Net Weight 108 0 Ibs 49 0 kg Shipping Weight 12
7. s long as a few things are understood 1 Enviro Board has been tested with a large num ber of commercially available paints with 100 success However it is impossible to test every paint available Altec Lansing therefore recom mends that you test a small area on the rear of the cabinet or under the arille to check there are no adverse effects 2 Ensure the surface is clean and free of grease use soapy water if necessary 3 Any latex enamel or acrylic based paint can be used but the high tech top layer of Enviro Board was developed in conjunction with Pittsburgh Paints They developed their Manor Hall Exte rior House series of paints to compliment the Enviro Board Altec Lansing recommends the use of these paints in adverse or tough situations 4 Water based Latex paints in particular can take a considerable time to dry fully They can be handled in a few hours but full strength may not be achieved for a week particularly in damp or cool conditions 5 The paint can be applied with a brush roller or spray Care should be taken not to get paint on the woofer cone 6 Stain can be used to highlight the grain in the Enviro Board or match real wood Care should be taken when using stain because it is impossible to refinish the material after staining A good approach is to use a stained varnish but be care ful as it is very difficult to lighten a stain HANGING AcoustaBASS The AcoustaBASS family of products has be
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