Altec Lansing M500 User's Manual
Contents
1. M500 Maestro Monitor High Output Performance HIGH ACOUSTIC OUTPUT 250 WATT e FRONT MOUNTED COMPONENTS RUGGED PASSIVE CROSSOVER e TWO WAY VENTED SYSTEM e 16 DIRECT RADIATOR e 909 DRIVER AND HORN e T NUT SUSPENSION APPLICATIONS e Music Playback in Conference Facilities e Small Dance Environments e Simple Cluster in Houses of Worship X SPECIFICATIONS FOR THE M500 MAESTRO MONITOR TWO WAY SYSTEM Two way vented full range loudspeaker system 96 5 dB SPL 1W 500 Hz 3kHz re 20uPa see Note 1 46 Hz 20 kHz see Figure 1 Note 2 250 watts 80 Hz 20 kHz AES method see Note 3 System Type Pressure Sensitivity Frequency Response Power Handling Maximum Long Term Output 120 5 dB SPL 250 watts input 1m re 20uPa see Note 4 Impedance 6 8 ohms minimum maximum inductive phase angle 399 1028 Hz maximum capacitive phase angle 419 9 Hz see Figures 3 and 4 Note 5 909 horizontally x 409 vertically see Figure 8 Model 3154 low frequency loud speaker model 909 8A high frequency driver model MR994A Mantaray high frequency horn Part number 56 06 027908 at 630 Hz with choice of high frequency attenuation Distribution Pattern Components Crossover Network SOUND PRESSURE LEVEL dB Figure 1 Frequency Response See Note 2 Minimum Impedance is 6 8 ohms at 106 Hz IMPEDANCE N FREQUENCY Hz Figure 3 Magnitude of Impedance Distortl2. armonlc A iA 100 200 500 K 2K 5K 10K 20K FREQUENCY Hz Harmonic Distortion at 0 1 Rated Power 25 watts See Note 7 DI t 2 A NS T Za HAN EHI A pis E EN ERN CY IN E NN Ly B 270 m os ioe xe fg SN L TE S Li Ww Th AK m 16000 Hz Figure 7 One third Octave Polar H OR IZONTAL Response Charts See Note 8 VERTICAL SCALE IS 5 dB div gP XZ0NI ALIAu23HIQ ante ttt e oooo co o g e mU Pep e Dep STONY BP 9 FREQUENCY Hz FREQUENCY Hz Figure 9 Q and DI Figure 8 Coverage Angle L LL LPS abt fe of ls x Bep 319NY DLL Lv NN 1 TART m CRD WIE Bap 315NY FREQUENCY Hz FREQUENCY Hz Figure 10 Horizontal Off Axis Response Contours Vertical Off Axis Response Contours Figure 11 DISTANCE mj 4 872 4 586 4 300 4 013 3 727 3 441 gp 13431 3ufiSS3ud GNNOS ren ae A5H3N3 FREQUENCY Hz 10831 12494 13326 14157 TIME us 10000 Time Energy Frequency Curve See Note 10 Figure 13 Energy Time Curve See Note 9 Figure 12 NOTES ON MEASUREMENT CONDITIONS 1 Pink noise signal one Watt calculated using E 2 Zmin 3 16 meter measurement distance referred to one meter 2 On axis one Watt calculated using E 2 Zmin 3 16 meter measurement distance referred to one meter low frequencies corrected for a
3. braced 34 inch 1 9 cm birch plywood damped with sound absorbing glass wool The M500 shall have a black stained finish The dimensions shall be 33 inches high by 261 inches wide by 171 inches deep 83 8 cm high x 67 3 cm wide x 44 5 cm deep The loudspeaker system shall weigh 86 Ibs 39 1 kg a MARK IV company PO BOX 26105 OKLAHOMA CITY OK 73126 0105 U S A 405 324 5311 OR FAX 405 324 8981 1990 ALTEC LANSING CORPORATION PRINTED IN U S A 8 90 AL 1602 42 02 027992
4. cy components Frequency bandwidth of the measurement 0 Hz 20 kHz Response decay of the system Time window is selected to display loudspeaker and box characteristics without room reflections Le CENTER OF GRAVITY 16 in 34 5cm 8 3 4 in 19 0cm IS SHOWN SUSPENDED WITH LOW FREQUENCY DRIVER TOWARD THE BOTTOM Figure 14 LOUDSPEAKER SYSTEM Figure 15 IS SHOWN WITH LOW FREQUENCY DRIVER TOWARD THE BOTTOM ARCHITECT S AND ENGINEER S SPECIFICATIONS The loudspeaker shall be the Altec Lansing Maestro Series M500 It shall be of the two way bass reflex type consisting of a front mounted 16 inch 40 6 cm low frequency loudspeaker a high frequency compression driver on an injection molded con stant directivity horn and a dividing network having a crossover frequency of 630 Hz The loudspeaker system shall meet the following per formance criteria Power handling 250 watts of pink noise with 6 dB crest factor band width limited from 48 Hz to 20 kHz Frequency response smooth and uniformly usable at high levels from 48 Hz to 20 kHz Pressure sensitivity 96 5 db SPL at one watt 500 Hz to 3 kHz measured at a ALTEC distance of one meter on axis Impedance 8 ohms nominal 6 8 ohms minimum Distribution pattern 90 horizontally nominal from 2 kHz to 20 kHz x 40 vertical nominal from 2 kHz to 20 kHz with asymmetrical coverage in the vertical plane The enclosure shall be constructed of
5. nechoic chamber error 3 This system rating patterned after the AES method for individual driver where the test signal is pink noise with 6 dB crest factor over the bandwidth of the system with power cal culated using E 2 Zmin for two hours 4 This measurement made under the same con ditions as Pressure Sensitivity but at rated power and takes into account any power compression effects due to non linearities in the system 5 The loudspeaker system should be connected to the 8 Ohm tap on amplifiers using trans former coupled output sections 6 Phase response of the system is measured at a time corresponding to the energy arrival of the high frequency component where the 5 16 18 HEX NUT 5 16 18 FORGED EYE BOLT FLAT WASHER LOUDSPEAKER SYSTEM 10 amplitude response is optimally flat as noted on figure 12 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 adding the number of Decibels which the harmonic has been raised on the graph and apply the formula percent distortion 100 X 10 dB change 20 The axis of rotation for all polar plots is the apparent apex of the high frequency driver Plots below 200 Hz have not been shown be cause of their lack of pertinent information The time window has been chosen to resolve the arrival times of the low and high frequen
6. on Components Raised 18 dB n Second Harmonic Third 4 n Harmonic gh SOUND PRESSURE LEVEL dB 20 50 100 200 500 1K 2K SK 10K 20K FREQUENCY Hz Harmonic Distortion at 0 01 Rated Power 2 5 watts See Note 7 Figure 5 Enclosure Input Connection Replacement H F Diaphragm Replacement L F Recone Kit Replacement Grille Dimensions Net Weight Shipping Weight Finish PHASE deg e 180 Vented type for optimum response built of 34 1 9 cm black stained birch plywood unfinished veneer model 9815 8A with appropriate bracing and stiffeners lined with glass wool including 5 1 tee nut mounting points on each side and a removable grille Red and black five way binding posts Model 26420 Model R3154 RG M500 33 83 8 cm high 26 67 3 cm wide 171 44 5 cm deep 86 Ibs 39 1 kg 98 Ibs 44 5 kg Black stained birch veneer M500 and unfinished birch veneer 9815 8A black grille cloth pr n 100 200 500 1K 2K 5K 10K 20K Figure 2 Phase Response See Note 6 30 Inductive n3 e 10 REACTANE N o _ Capactive 0 A Maximum Inductive Phase Angle is 39 at 1028 Hz B Maximum Capacitive Phase Angle is AT at 9 Hz 20 30 40 50 60 Figure 4 Complex Impedance Distortion Components o a se g SOUND PRESSURE LEVEL dB Figure 6 Raised 12 dB Second Harmonic Third LA H
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