User manual STUDIOMASTER AX 2500

[. . . ] This equipment must not be exposed to dripping or splashing and no objects filled with liquids should be placed on top of it. Always ensure that both front and rear ventilation holes are clear of obstructions. Write the serial number in the box provided below for future reference. 2. 3. 4. 9. 10. If the unit gets damaged or appears to have developed a fault refer to the Service Information section for details. WARNING: THIS APPARATUS MUST BE EARTHED (GROUNDED) STUDIOMASTER AX Amplifier Series 1 STUDIOMASTER AX Amplifier Series Front panel controls and features 4 1 2 3 4 Professional Power Amplifier -15 -20 -3 -30 -30 0dB -10 -5 -20 -3 SIG -6dB PEAK PROTECT -15 -10 -5 CHANNEL A POWER AX 2500 BRIDGE I O A B 0dB CHANNEL B 8 8 1. [. . . ] 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. 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. 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. After a couple of seconds the LEDs will turn off showing normal operation. Check that the LEVEL control(s) are not in the minimum (anti clockwise) position. Check that the speakers are connected correctly. Distorted sound and PEAK LED(s) illuminated. . . 1. If only on channel A, check a 4 core speaker cable is not being used with a speaker that links PIN1+ to PIN2+ of the Speakon connector. One or Both Amplifier channels stop working briefly. . . Check that the amplifier is not being over driven - red peak LEDs should not be illuminated 'continuously'. Amplifier stops working and one or more PROTECT LEDs are illuminated. . . 1. See PROTECT LED section for more information. STUDIOMASTER AX Amplifier Series 7 STUDIOMASTER AX Amplifier Series Service Information If you have a problem with your Studiomaster product or think it has developed a fault you should first carefully check the Trouble Shooting section in this guide. If this does not solve the problem or if the product is physically damaged, contact your local dealer or distributor for service details. [. . . ] A PIN 1+ = PIN 2+ = + - XOVER TO CH B - AMP LIMITER OFF LINK XOVER OUTPUT OFF ON CH INPUT B LO HI LO B PIN 1+ = PIN 1- = + - Select same frequency (100 or 150Hz) on both Amplifiers Left Bass / LO Speaker 30Hz HI XOVER TO CH A - AMP PIN 1+ = PIN 1- = + - LIMITER OFF LINK PARALLEL INPUTS 30Hz XOVER OUTPUT OFF ON CH INPUT A GND LIFT LO 100Hz 150Hz HI HI LO A BRIDGE CH. A PIN 1+ = PIN 2+ = Right Bass / LO Speaker + - XOVER TO CH B - AMP LIMITER OFF LINK XOVER OUTPUT OFF ON CH INPUT B LO HI LO B PIN 1+ = PIN 1- = + - XOVER ON Switch IN Select LO Switch IN STUDIOMASTER AX Amplifier Series 13 STUDIOMASTER AX Amplifier Series 5 2-way Monitor Mix Monitor Outputs 1 2 Stage Monitor Stage Monitor 30Hz HI XOVER TO CH A - AMP PIN 1+ = PIN 1- = + - Total Load on each channel = NOT less than 2 Ohms eg: If each monitor is 8 Ohms then 8 divide 2 = 4 A maximum of 4 8 Ohm monitors per channel can be used. LIMITER OFF LINK PARALLEL INPUTS 30Hz XOVER OUTPUT OFF ON CH INPUT A GND LIFT LO 100Hz 150Hz HI HI LO A BRIDGE CH. A PIN 1+ = PIN 2+ = + - XOVER TO CH B - AMP LIMITER OFF LINK XOVER OUTPUT OFF ON CH INPUT B LO HI LO B PIN 1+ = PIN 1- = + - Stage Monitor Stage Monitor Left Mid / HI Speaker 6 Stereo Bi-amp with Mono Sub Bass Left Right Mono Out 30Hz HI XOVER TO CH A - AMP Right Mid / HI Speaker XOVER ON Switch IN Select HI Switch OUT PIN 1+ = PIN 1- = + - LIMITER OFF LINK PARALLEL INPUTS 30Hz XOVER OUTPUT OFF ON CH INPUT A GND LIFT LO 100Hz 150Hz HI HI LO A BRIDGE CH. A PIN 1+ = PIN 2+ = + - XOVER TO CH B - AMP LIMITER OFF LINK XOVER OUTPUT OFF ON CH INPUT B LO HI LO B PIN 1+ = PIN 1- = + - 30Hz HI XOVER TO CH A - AMP PIN 1+ = PIN 1- = + - Select same frequency (100 or 150Hz) on both Amplifiers LIMITER OFF LINK PARALLEL INPUTS 30Hz XOVER OUTPUT OFF ON CH Use ONLY Channel A output. [. . . ]