User manual STUDIOMASTER AX 3500

[. . . ] AX Professional Power Amplifiers 1500 2500 3500 USER GUIDE STUDIOMASTER AX Amplifier Series Contents Instructions Unpacking Safety Instructions Front panel controls and features Rear panel controls and features Operation Ventilation Protect LEDs Cables Rack Mounting Trouble Shooting Service Information Technical Information Technical Specification Glossary of Terms Set-up Diagrams Mono Mix Stereo Mix Mono Bi-amp Stereo Bi-amp 2-way Monitor Mix Stereo Bi-amp with Mono sub bass 2-way stereo with additional amplifiers Notes 1 1 2 3-5 6 6 6 7 7 7 8 9 - 10 11 12 12 13 13 14 14 15 16 STUDIOMASTER AX Amplifier Series STUDIOMASTER AX Amplifier Series Congratulations on your purchase of a Studiomaster AX Series power amplifier. Like all Studiomaster products, it has been designed to meet the highest standards of performance, safety and reliability. We are confident that this amplifier will fully meet your needs for many years to come. Please read this guide carefully and keep it safe in case you need to refer to it in the future. Unpacking Remove your AX amplifier from its packing. [. . . ] The set up diagrams later in this guide will help. Always ensure that all signal and power connections to the amplifier are properly made before switching on. It is recommended to turn the level controls to minimum initially as well. Any amplifier(s) in a system should always be switched on LAST and switched off FIRST to prevent damaging thumps, originating from other equipment. Hints and tips 1. Make sure that the speakers being used have the correct power rating for the amplifier. This will help avoid possible damage to the speakers. The optimal speaker load impedance for power delivery and long term operation is 4 ohms per channel; 8 ohms in bridged mode. The amplifier will operate into 2 ohm loads; 4 ohms bridged, although continuous flashing of the PEAK LED should be avoided to prevent thermal protection shutting down the amplifier. Always use the LIMITER (rear panel switch in the out position) as it helps prevent distortion on large signal peaks. Use the 35Hz filter (rear panel switch 'in' position) as it will improve the bass power handling and clarity of the system. This is especially important with vented / ported / 'bass reflex' cabinets. When used with a pro-audio mixer, adjust the level controls to a position compatible with the mixer metering. A suggested starting position for the level controls is '-10'. 3. 4. 5. Ventilation It is essential that air can circulate freely around the amplifier to provide adequate cooling. The fans take air in from the rear of the amplifier and exhaust through the front panel. Both the front and rear ventilation holes must not be obstructed. When the amplifier is rack mounted, care must be taken to ensure that the rack is open at the front and rear to allow sufficient air flow. In some installations, racks are fitted with covers for security reasons. If these restrict the air flow in any way they must be removed while the amplifier is in operation. Where multiple amplifiers are installed in a rack, additional forced ventilation or a source of fresh cooling air may be required. Protect LEDs Operate independently and show that the speaker outputs have been muted resulting in no sound. They illuminate under the following conditions: 1. After a couple of seconds the LEDs will turn off showing normal operation. [. . . ] The method normally used to measure AC Voltages. The interference suppressing outer conductor in mic and line cables. The connectors or controls used to send a signal, connected externally to a mixing console. The ratio used to describe the relationship between the level of a signal and the background noise that accompanies it. [. . . ]