User manual ALTEC LANSING 1662A SIGNAL PROCESSING

[. . . ] A full 11 segment LED array indicates stereo output level. Mic/line inputs and main outputs use Euroblock connectors, allowing bare wire to be easily connected to the mixer without soldering. The 1662A mixer uses professional quality 16mm metal shaft potentiometers for greater accuracy and long life. they were carefully designed to reduce to minimum the possibility of transportation damage should the unit again require packing and shipping. [. . . ] Contro 4. 6 Output Level Contro l s These two controls determine the signal level to the "A" and "B" outputs. They are used to drive power amplifiers for the main loudspeakers, or to connect to a stereo recording device. 4. 7 Output Meters A pair of peak reading 11 segment LED meters are used to indicate stereo output level in VU. 0 VU is equivalent to +4 dBu (1. 228Vrms). Green LED's are used below 0 VU, yellow above 0 VU and two red LED's indicate clipping. The clip LED's turn on 3dB below actual 4 Operating Manual -1662A Mic/Line Mixer Power clipping, detecting excessive signal level on any critical audio path within the master section. If all outputs are turned down and there is still clipping, then one or more inputs needs to be turned down. 4. 8 Phantom Power LED The phantom power switch is on the back panel. When the switch is pressed in, the LED is lit and +48VDC is applied to all six mic inputs for use with condenser microphones. If there is a mix of both condenser and dynamic microphones, the phantom power will not affect the operation of the most dynamic mics. The phantom power voltage ramps up gradually to minimize any turn-on "pops". construction. This type of cable should be used for all portable applications. Snake cables containing multiple shielded pairs can be used for a permanent installation, but must be handled very carefully because the leads tend to be fragile, and a broken conductor is difficult to repair. If low level and high level lines are run parallel for long distances, crosstalk may occur. In fact, the crosstalk (signal leakage between cables) can cause an electronic feedback loop, oscillation, and possibly damage to the equipment. To minimize crosstalk, physically separate low level (microphone) cables from speaker cables by the greatest feasible distance. At any point where cables meet, run low level cables perpendicular to high level or speaker cables. If low and high level or speaker cables must be run parallel and in close proximity to one another, they should be bundled separately. In a permanent installation, avoid running speaker cables and mic cable through the same conduit pipe. 5. CONNECTORS AND CABLES The 1662A mixer is fitted with three types of audio connectors: 3-pin Euroblock assemblies are used for mic/line inputs and main outputs, 1/ 4" tip-ring-sleeve (TRS) phone jacks are used for individual channel insert points, and RCA jacks are used for sum inputs. Two-conductor (twisted pair) shielded cable is best for all audio connections that use Euroblock assemblies. 8412 or its equivalent is an excellent cable due to its heavy 5 Operating Manual -1662A Mic/Line Mixer PANEL FEATURES 6. [. . . ] WARRANTY INFORMATION The unit you have just purchased is protected by a limited five-year warranty . For warranty service or to obtain a return RMA number, please call Altec Lansing technical services at 405-848-3108. Fill out the information below for your records. Model Number _______________________________ Serial Number ________________________________ Dealer ________________________________________ ______________________________________________ Date of Purchase ______________________________ Dealer's Address ______________________________ ______________________________________________ ______________________________________________ Dealer's Phone ________________________________ Salesperson ___________________________________ ______________________________________________ FREQUENCY RESPONSE 20Hz-20KHz . [. . . ]