Altec Lansing 19 Walnut User's Manual
Contents
1. Model 19 Walnut Model 19 Oak MODEL 19 OAK Altec Studio Monitor Speaker Systems are designed to meet the stringent specifica tions of extended frequency response low distortion and wide dynamic range that are required for use in recording and broadcasting studios The bass loud speaker woofer produces extended low frequency response even when driven at exceptionally high power levels Two fre quency adjustment controls high and mid range are provided to adapt the Studio Monitor Speaker Systems to a wide range of acoustic environments including audition rooms recording studio control room monitoring remix studios mastering rooms broadcast studio moni toring and playback auditoriums night clubs conference rooms theaters churches and other professional applications All of these Studio Monitor Speaker Sys tems combine excellent overall band width low distortion uniform dispersion and extended frequency response Major differences between the larger Model SOUND PRODUCTS DIVISION Specifications and components subject to change notice Overall performance will be maintained or improved Model 15 Walnut Model 15 Oak MODEL 15 OAK 19 and smaller Model 15 systems are sensitivity acoustic output and enclosure size For applications where sensitivity and acoustic output are of major impor tance the larger Model 19 should be used Where space is at a premium and slight red2. DO NOT lay the system on its front side because the grille coverings may be dam aged Position the base against the bot tom of the cabinet rubber feet facing outward aligning the pilot screw holes Install the supplied screws No 8 x 242 for Model 19 and No 10 x 1 for Model 15 to secure the base to the cabinet Tighten all screws Figure 1 Suspended Studio Monitor Speaker System without 42 02 033968 02 LITHO IN U S A 278 6M Electrical Connections Two terminals at the underside of the cabinet connect leads from the amplifier If more than one Studio Monitor Speaker System is connected to the amplifier s be sure to observe polarity so that proper acoustic phasing is achieved Removal of Grilles Push and lock fasteners secure each grille to the cabinet To remove a grille simply grasp the upper corners and pull firmly outward To put the grille back on align it with the cabinet and press each corner until firmly seated For the Model 15 also press the center of the grille just below the horn area to engage the central fastener Frequency Controls Two frequency controls are located on the network equalizer assembly behind the grille lower grille for the Model 19 When the controls are positioned in the OPTI MUM area of adjustment a flat fre quency response is obtained for most acoustic environments Figure 2 shows a typically fl
3. Figure 7 Schematic Diagram 3
4. SE Figure 3 Typical Response of Model 19 with Controls at Maximum and Minimum Positions 10 20 50 100 200 500 1000 2000 5000 10000 20000 SOLID LINE HF CONTROL FULLY COUNTERCLOCKWISE MF CONTROL FULLY CLOCKWISE BROKEN LINE HF CONTROL FULLY CLOCKWISE MF CONTROL FULLY COUNTERCLOCKWISE Figure 4 Typical Response of Model 19 with Controls at Opposite Maximum and Minimum Positions one control fully up and the other con trol fully down With the HF control down and the MF control up solid line mid range frequencies are enhanced and treble frequencies are attenuated With the HF control up and the MF con trol down broken line mid range fre quencies are attenuated and treble fre quencies are enhanced Maximum range of the two controls is nominally 14 dB Upon inspection of the curves shown in Figures 3 and 4 some interaction is seen between the two con trols This control interaction prevents extreme imbalance between mid to high response and assures minimum phase shift through the crossover network Con trols for the Model 15 function in a similar manner By experimenting with these controls you may determine which particular settings produce the most pleasing effects for your acoustic environment SERVICE INFORMATION Speaker system components may be detached from the cabinet by removing appropriate mounting screws The low freque
5. at response of the Model 19 when both frequency controls are set in the OPTIMUM area of operation When the HF LEVEL control is turned counterclockwise from the OPTIMUM area the higher frequencies are rolled off or reduced in volume This enhances the bass and mid range frequencies When the MF LEVEL control is turned counterclockwise from the OPTIMUM area the mid range frequencies are atten uated producing a dip in the mid range portion of the audio spectrum This enhances the bass and treble frequencies Turning the control clockwise from the OPTIMUM area enhances the mid range frequencies Figure 3 shows effects to the audio spectrum when the two controls are turned fully up or down With both controls up solid line both mid range and treble frequencies are enhanced With both controls fully down broken line the same frequencies are attenuated which enhances the bass frequencies Figure 4 shows effects to the audio spectrum when the controls are turned to extreme opposites to one another with HF AND MF CONTROLS IN OPTIMUM AREA 10 20 50 100 200 500 1000 2000 5000 10000 20000 FREQUENCY IN HERTZ Figure 2 Typical Response of Model 19 with Optimum Control Settings 10 20 50 100 200 1000 2000 5000 10000 20000 FREQUENCY IN HERTZ SOLID LINE HF AND MF CONTROLS FULLY CLOCKWISE BROKEN LINE HF AND MF CONTROLS FULLY COUNTERCLOCKWI
6. ncy loudspeaker and the network assembly each mount to the cabinet with four screws see Figure 5 The Model 19 horn driver assembly is mounted to the upper part of the cabinet with six bolts which are accessible when the acoustic damper pad is removed The Model 15 horn driver assembly is mounted with four bolts The driver and interfacing gasket are attached to the horn with two nuts and two washers see Figure 6 Electrical connections are made in accordance with the schematic diagram of Figure 7 u HF HORN NETWORK ACOUSTIC PORT ACOUSTIC PORT NETWORK MODEL 19 MODEL 15 OAK GASKET HORN OAK ATTACHING SPEAKER NUT AND WASHER 2 TYPICAL Figure 5 Typical Monitor System with Grilles Removed Figure 6 Horn Driver Mounting RED TERM List of Replacement Components for List of Replacement Components for t Model 19 Model 15 HF CROSSOVER BLK TERM Ordering Ordering NETWORK GRN RED TERM Number Name and Description Number Name and Description LF 10 01 03 266 10 01 03 208 416 8B Low Frequency Loudspeaker 10 01 03 288 33952 High Frequency Driver 10 01 03 022 811B Horn 56 06 033843 Network Equalizer Assembly 10 01 03 288 50 02 032446 56 06 033874 31 01 023921 Low Frequency Loudspeaker 33952 High Frequency Driver Horn Network Assembly Gasket LF Loudspeaker 31 04 033846 Acoustic Damper F INPUT TERMINALS
7. uction in sensitivity and acoustic output is not detrimental the smaller Model 15 becomes the logical selection Wall or Ceiling Mounting For many professional applications the Studio Monitor Speaker System is hung or suspended from a wall or ceiling A recommended type of installation utilizes four 20 eyebolts which are secured in the sides of the cabinet with flat washers and nuts The low frequency loudspeaker must be removed to install the eyebolts The Studio Monitor Speaker System is then suspended by the four eyebolts with a lightweight chain 200 pound pull from anchor points in the wall 1515 S Manchester Ave Anaheim Calif 92803 STUDIO MONITOR SPEAKER SYSTEMS OPERATING INSTRUCTIONS or ceiling Baffle angle of the monitor may be adjusted by raising or lowering one pair of supporting chains at the anchor points Figure 1 illustrates a_ typical ceiling mounted system When the cabinet is hung bass side up the network equalizer assembly may be removed rotated 180 degrees and reinstalled to maintain a right side up orientation Optional Mounting Base If the discriminating listener wishes to use the Studio Monitor Speaker System in the home environment the optional mounting base may be secured to the bottom of the cabinet To install the optional mounting base position your Studio Monitor Speaker System on one side or the top using a carpeted surface to protect the finish of the cabinet
Download Pdf Manuals
Related Search