Altec Lansing 1209B User's Manual
Contents
1. 1209B Powered Speaker System ALTEC has combined the 771B Electronic Crossover Biamplifier with the 1208B Nonpowered Speaker System to provide ALTEC s 1209B Powered Speaker System a superb speaker system to make your happening happen one that projects sound to the farthest listener Horns control wide angle distribution of up to 90 watts of continuous program material for the entire audio spectrum Since all frequencies are reproduced by horns off axis frequency response is almost identical to on axis response Listeners in side and rear seats hear the same natural sound as those in front row center seats All components of the 1209B system are carefully matched 421A Low Frequency Musical Instrument Loudspeaker 15 woofer for high efficiency in reproduc ing bass and mid bass sounds 3 edge wound aluminum ribbon voice coil rigid cast aluminum frame 17 pound magnet assembly 511B High Frequency Sectoral Horn massive cast aluminum 25 wide Operates from 500 Hz to beyond audibility 808 8A High Frequency Driver has an extremely rugged voice coil and diaphragm assembly that handles much more power than conventional drivers Smooth response from 500 to 20 000 Hz 771B Electronic Crossover Biamplifier two separate power amplifiers that faithfully reproduce all frequencies a 60 watt power amplifier for low frequencies from 35 to 500 Hz and a 30 watt power amplifier for mid and high frequencies2. selectable with 12 dB octave crossover slope Each channel shall have a separate slide type gain control continuously variable from 6 dB to 15 dB The speaker system shall meet the following performance criteria Frequency response 35 Hz to 20 kHz normalized composite output Pressure sensitivity 103 dB SPL when measured at 4 on axis with 1 watt input of pink noise from 100 Hz to 10 kHz Ref 0 0002 dyne cm2 Equivalent EIA rating 56 dB SPL when measured at 30 on axis with 1 milliwatt input Acoustic output for rated power at maximum gain settings with direct input or high level balanced line matched input 118 0 dB SPL when measured at 4 on axis wi 0 5V rms input of pink noise from 500 Hz to 3000 Hz Ref 0 0002 dyne cm2 with high level balanced line bridging input 118 0 dB SPL when measured at 4 on axis ah 0 1V rms input of pink noise from 500 Hz to 3000 Hz Ref 0 0002 dyne cm2 Crossover fre quency 500 Hz with 12 dB octave crossover slope Horizontal distribution pattern uniform over 90 Vertical distribution pattern uniform over 40 Dimensions 54 H x 30 W x 24 D HF horn externally mounted 42 H x 30 W x 24 D HF horn internally mounted The speaker system shall be finished in medium gray enamel and shall weigh 180 pounds The speaker system shall be the ALTEC Model 1209B The 1209B shall be furnished with the following ALTEC accessories select as required and insert quantit
3. 5 THD Less than 0 5 at rated power 20 Hz to 20 kHz Unmeasurable by normal IHF method 500 800 or 1500 Hz with 12 dB octave slope 1 dB from 20 Hz to 20 kHz normalized composite output 15 000 ohms direct 600 ohms with 15095A transformer 15 000 ohms with 15335 transformer 8 ohms nominal for each amplifier Damping Factor Noise Level Controls Power Requirements Dimensions Overall Panel Cutout Weight Color Optional Accessories NOTE 25 80 dB below rated output 1 BASS GAIN CONTROL continuously variable 6 dB to 15 dB 1 TREBLE GAIN CON TROL continuously vari able 6 dB to 15 dB 1 ELECTRONIC CROSS OVER FREQUENCY switch 500 800 1500 Hz Use 500 Hz for 1209B 1 POWER switch 1 PRESS TO RESET push button circuit breaker 771B only 1 VOLTAGE SELECT switch 771B X only 120V ac 50 60 Hz 17W at zero signal 90W at 30W output 135W at 90W output 6 1 2 H x 9 7 8 Wx 9 D 16 51 cm H x 25 08 cm W x 22 86 cm D 5 1 2 H x 9 1 2 W 13 97 cm H x 24 13 cm W 16 pounds 7 26 kg Black ALTEC 15095A Line Bridging Transformer ALTEC 15335 Line Match ing Transformer ACCESSORIES MUST BE ORDERED SEPARATELY _ ALTEC 1209B ARCHITECT S AND ENGINEER S SPECIFICATIONS i The powered speaker system shall be the biamplified sound reinforcement type with a sturdy plywood front loaded LF exponential horn a self co
4. 0 2 conductor cable with standard diameter phone plug on each end 54 4 H x 30 W x 24 D 137 80 cm H x 76 20 cm W x 60 96 cm D 42 H x 30 W x 24 D 106 68 cm H x 76 20 cm W x 60 96 cm D Theatre gray enamel 180 pounds 81 50 kg Ar al RESPONSE IN dB HSH Se 50 100 200 Hz 500 1000 FREQUENCY IN HERTZ Figure 1 Frequency Response Measured at 4 on Axis with 1 Watt Input 2000 Hz 5000 10000 20000 Type Gain with Full Boost Bass Amplifier Treble Amplifier Input Sensitivity for Rated Output with Full Boost Power Output Bass Amplifier Treble Amplifier Total Harmonic Distortion THD IM Distortion Crossover Frequency Frequency Response Input Impedance Load Impedance BIAMPLIFIER SPECIFICATIONS Biamplifier with electronic crossover 52 dB with 15335 Line Matching Transformer 66 dB with 15095A Line Bridging Transformer 49 dB with 15335 Line Matching Transformer 63 dB with 15095A Line Bridging Transformer 0 5V rms direct 0 5V rms with 15335 Line Matching Transformer high level balanced line matched input 0 1V rms with 15095A Line Bridging Transformer high level balanced line bridging input 60 watts at less than 0 5 THD 30 watts at less than 0
5. from 500 to 20 000 Hz 828B Low Frequency Horn sturdy plywood front loaded exponential horn provides excellent bass and mid bass reproduction and controlled sound projection The 1209B components are shipped separately in kit form ready to assemble All that is needed is a screwdriver and 30 minutes Assemble it with the sectoral horn on top or inside the cabinet it sounds great either way Detailed specifications and descriptions of 1209B system components can be obtained from their respective ALTEC catalog sheets and brochures 1515 S Manchester Ave Anaheim Calif 92803 A DIVISION OF ALTEC CORPORATION _ ALTEC 1209B 1209B SPECIFICATIONS Type Power Output Bass Amplifier Treble Amplifier Power Requirements Input Sensitivity for Rated Output with Full Boost Pressure Sensitivity Acoustic Output at Maximum Gain Settings Direct Input No Transformer High Level Balanced Line Matched Input 15335 Transformer High Level Balanced Line Bridging Input 15095A Transformer Biamplified powered speak er system with wide angle coverage 60 watts 30 watts 120V 50 60 Hz 17W at zero signal SOW at 30W output 135W at 90W output 0 5V rms direct 0 5V rms with 15335 Line Matching Transformer high level balanced line matched input 0 1V rms with 15095A Line Bridging Transformer high level balanced line bridging in
6. ntained electronic crossover biamplifier a 15 musical instrument type LF loudspeaker an HF driver and a cast aluminum 25 sectoral HF horn having exponential expansion A 50 2 conductor cable with standard 1 4 phone plug at each end shall be included with the system The biamplifier shall contain a power supply capable of operating from a 120V ac 50 60 Hz line electronic crossover circuitry separate LF and HF power amplifiers and fail safe protective circuitry for its output transistors All circuitry in the bi amplifier shall be solid state with all transistors and diodes of the silicon type The biamplifier shall meet the following performance criteria Amplifier outputs 60 watts bass 30 watts treble THD at full rated output less than 0 5 at all frequencies from 20 Hz to 20 kHz Input sensitivity for rated output 0 5V rms direct or with line matching transformer accessory 0 1V rms with line bridging transformer acces sory Input impedance 15 000 ohms direct or with line matching transformer acces sory 600 ohms with line bridging transformer accessory Load impedance 8 ohms l nominal for each amplifier Bass amplifier gain with full boost 52 dB with line matching transformer accessory 66 dB with line bridging transformer accessory Treble amplifier gain with full boost 49 dB with line matching transformer acces sory 63 dB with line bridging transformer accessory Crossover frequency 500 800 or 1500 Hz
7. put 103 dB SPL measured at 4 on axis with 1 watt in put of pink noise from 100 Hz to 10 kHz Ref 0 0002 dyne cm2 Equal to EIA rating of 56 dB SPL measured at 30 on axis with 1 milliwatt input 118 0 dB SPL measured at 4 on axis with 0 5V rms input of pink noise from 500 Hz to 3000 Hz Ref 0 0002 dyne cm2 118 0 dB SPL measured at 4 on axis with 0 5V rms input of pink noise from 500 Hz to 3000 Hz Ref 0 0002 dyne cm 2 118 0 dB SPL measured at 4 on axis with 0 1V rms input of pink noise from 500 Hz to 3000 Hz Ref 0 0002 dyne cm 2 Input Impedance Frequency Response Crossover Frequency Input Connections Distribution Pattern Components Dimensions HF Horn Externally Mounted HF Horn Internally Moutned Finish Weight 15 000 ohms direct 15 000 ohms with 15335 transformer 600 ohms with 15095A transformer 35 Hz to 20 kHz normal ized composite output see Figure 1 500 Hz with 12 dB octave slope 2 standard 2 diameter phone jacks paralleled Barrier type terminal board for 600 ohm applications requires transformer acces sory module to be installed in biamplifier 90 horizontal vertical 1 ALTEC 421A Low Fre quency Musical Instru ment Loudspeaker 1 ALTEC 511B High Fre quency Sectoral Horn 1ALTEC 808 8A High Frequency Driver x 40 1 ALTEC 771B Electronic Crossover Biamplifier 1 ALTEC 828B Low Fre quency Horn 1 ALTEC 5
8. y 15095A Line Bridging Transformer 15335 Line Matching Transformer LITHO IN U S A CP 273 5K AL 1829 Specifications and components subject to change without notice Overall performance will be maintained or improved
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