Myryad ma 500 owners manual
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- Introduction 3 - Installation and safety notes 3 - Accessories 3 - Rear panel diagram 4 - Power inlet 4 - Power switch 4 - My-Link input/output 4 - Remote trigger control input/output 5 - Loudspeaker outputs 5 - Line Inputs 5 - Line Outputs 5 - Front Panel Controls 6 - Standby switch 6 - Loudspeaker output protection and muting 6 - Trouble-shooting guide 7 - Specifications 7 2 CONTENTS No sound: -Power turned off or system in standby mode. Check that the LED in the STANDBY button is blue. -The input connection is loose or missing. Check that the connection is secure. -Protection relay has operated because of a short circuit loudspeaker wire or amplifier overheating. Carefully check all wiring after switching the amplifier POWER OFF to allow it to cool. -The fuse in the power cord inlet has failed. Unplug the power cord from both the wall socket and the amplifier and pull out the small receptacle below the power cord inlet. Two fuses should be visible. The further fuse is the operative one and should be checked. If it has failed, replace it with the nearer (spare) fuse. If this too fails, then return the amplifier to your dealer for service. -UK version only: The fuse in the mains plug has failed. Check and replace if necessary. Sound in one channel only: -Loudspeaker cable pulled loose. Check all connections, both at the loudspeakers and amplifier. -Interconnect cable pulled loose or making poor contact. Check and, if necessary, un-plug and re-plug all relevant cables. -Amplifier produces less power than normal. First level temperature protection activated (see page 6). Reduce volume, or improve ventilation to allow amplifer to cool. Amplifier fails to respond to My Link remote commands (from e.g. MDP 500 Preamplifier-Processor): -My-Link cable is loose or not connected. Check connections on all linked units. Loud buzz or hum: -Interconnect cable pulled partially out of its socket. -Defective interconnect cable. Incorrect operation - some functions not working: -Control processor latched. Switch off POWER on rear panel and wait for about one minute. Then switch POWER on. Normal operation should resume. TROUBLE-SHOOTING GUIDE SPECIFICATIONS Some of the most common problems Five channels drivenContinuous average power output (<0.05% THD, 20Hz-20kHz)…………………………………………………8Ω:100 W …………………………………………………………………………………………………………………………4Ω:150 W IHF dynamic power……………………………………………………………………………………………………8Ω:150 W …………………………………………………………………………………………………………………………4Ω:240 W One channel drivenMaximum continuous power output (1% THD, 1kHz)……………………………………………………………8Ω:160 W …………………………………………………………………………………………………………………………4Ω:280 W IHF dynamic power……………………………………………………………………………………………………8Ω:180 W …………………………………………………………………………………………………………………………4Ω:320 W Input sensitivity (for 100 Winto 8Ω)………………………………………………………………………………………1.0 V Voltage Gain…………………………………………………………………………………………………………………29dB Input impedance…………………………………………………………………………………………………25 kΩ/440pF Frequency response (20Hz - 20kHz)……………………………………………………………………………………±0.2dB Signal/Noise ratio (A weighted, ref. 100 W)……………………………………………………………………………110dB Line inputs………………………………………………………………………………………………………5 x RCA phono Line outputs……………………………………………………………………………………………………5 x RCA phono Control inputs/outputs………………………………………………………………………My-Link I/O: 2 x RCA phono …………………………………………………………………………………………DC trigger I/O: 2 x 3.5mm mono jack Loudspeaker outputs……………………………………………………………5 pairs of gold-plated 5-way binding posts Physical specificationDimensions (width x height x depth)…………………………………………………………………436 x 135 x 368 mm Weight, Net:………………………………………………………………………………………………………………20 kg Power requirementsVoltage (set by internal wiring)…………………………………………………………………………………120 or 230 V Stock No: OST0012000 7
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When the amplifier is in standby mode the loudspeaker output terminals are isolated from the amplifier by a high quality relay. When the amplifier is first switched on from standby mode the loudspeaker outputs remain disconnected for a few seconds to allow the internal voltage levels to settle. The loudspeaker outputs are immediately disconnected again when the amplifier is switched back into standby mode. The same loudspeaker mute relay is used to protect both the amplifier and your loudspeakers against possible damage. If any one of a number of fault modes is detected (loudspeaker outputs short circuit, amplifier overheating, amplifier DC fault) the loudspeakers will be disconnected from the amplifier to protect both. In the case of a short circuit or DC fault the loudspeakers will be re-connected after a few seconds, but will be disconnected again if the fault persists. If overheating has caused the protection system to operate, then it will take some time for the heatsinks to cool sufficiently to allow the loudspeakers to be re-connected (probably between five and fifteen minutes depending upon the room temperature and ventilation). The amplifier will cool more quickly if it is switched to standby mode, or if the POWER is switched OFF. 1Standby When the amplifier is plugged into a live wall socket and the POWER switched is turned ON, it will power up in standby mode and the LED (Light Emitting Diode) in the STANDBY button will glow red. In this mode the internal circuitry of the amplifier is powered up, but disabled so that it consumes very little power and is isolated by relays at its outputs. When the STANDBY button is pressed the amplifier circuitry will be activated and the LED will flash blue. After about four seconds delay the loudspeaker outputs will be connected to the amplifier and the LED in the STANDBY button will glow blue continuously. When the STANDBY button is pressed again the amplifier will be returned to standby mode. The LED in the STANDBY button will change back to red. PLEASE NOTE: WHEN THE POWER AMPLIFIER IS REMOTELY ACTIVATED FROM ANOTHER UNIT, THERE MAY BE A BRIEF DELAY BETWEEN THE CLOSING OF THE OUTPUT RELAYS OF THE TWO UNITS. THIS IS NORMAL AND NO CAUSE FOR CONCERN. CAUTION: WHEN IN STANDBY MODE THE INTERNAL CIRCUITRY OF THE MA 500 IS STILL LIVE, SO ALL SAFETY PRECAUTIONS MUST BE FOLLOWED. OPERATING YOUR SYSTEM FRONT PANEL CONTROLS LOUDSPEAKER OUTPUT PROTECTION AND MUTING The protection circuits of each of the five channels of the MA 500 are linked together, so whichever channels protection is activated, whether by short circuit, overheating or any other reason, all five speaker relays will open so muting all five channels. The MA 500 has two levels of over- temperature protection. If the lower temperature threshold is exceeded, the maximum power output of the amplifier is reduced until the temperature falls to a safe level. The amplifiers gain is unaffected so this first level protection will probably have no audible effect. If the higher temperature threshold is exceeded the loudspeaker relays are opened, muting all five channels as described above. 6 MA 500 Five Channel Power Amplifier STANDBY 1 The Myryad MA 500 Power Amplifier has been designed to offer a combination of high quality sound reproduction and simple yet elegant styling. It can be used to provide power for high quality Home Cinema or music surround systems when partnered by a suitable surround preamplifier-processor such as Myryads MDP 500. It can also be used in install situations as a high-quality high-powered distribution amplifier. The MA 500 has unbalanced line inputs plus directly linked line outputs for each channel, all on high-quality gold-plated RCA phono sockets. Loudspeaker outputs are provided by a pair of solid metal gold- plated 5-way binding posts. Like all Myryad M-Series Power Amplifiers, the MA 500 may be controlled remotely via the My-Link communications bus when used with other Myryad M-Series products. My-Link allows remote control of standby and mute functions. In addition to this, the MA 500 power amplifier may be switched into or out of standby remotely using its DC trigger input. 3 MA 500 applications include: -Use in conjunction with the MDP 500 Digital Preamplifier-Processor, delivering five channels at 100 watts into 8Ωin Home Cinema systems of the highest quality. -Use in a multi-room setup, possibly together with other MA 500s, to deliver high-power high-quality audio to a number of different rooms with minimal crosstalk between channels. -Stereo bi-amplifier operation with an MP 100 Stereo Preamplifier - the MA 500 delivering 2 x 100 watts/8Ωinto each loudspeaker (one MA 500 channel unused).This amplifier generates a modest amount of heat and thus requires ventilation. Do not place it on a rug or other soft surface into which it could sink, obstructing the air inlets in its underside. Do not allow papers or cloth to obstruct the ventilation grille in the top cover. The amplifier should not be installed in a built-in situation such as a bookcase or cabinet unless proper ventilation is provided. If the amplifier is moved shortly after operation take care not to touch the heatsinks, which are accessible from below, as they may be very hot. The amplifier is designed for use in moderate climates. CAUTION: TO PREVENT A FIRE OR SHOCK HAZARD, DO NOT PERMIT THIS PRODUCT TO BECOME WET OR EXPOSE IT TO DRIPPING OR SPLASHING. DO NOT PLACE OBJECTS FILLED WITH LIQUID, SUCH AS VASES, ON THE AMPLIFIER. IF LIQUID IS ACCIDENTALLY SPILLED ON IT, IMMEDIATELY SHUT OFF ITS POWER AT THE WALL SOCKET AND UNPLUG THE AC POWER CORD. ALLOW SUFFICIENT TIME FOR COMPLETE EVAPORATION TO OCCUR BEFORE OPERATING THE AMPLIFIER AGAIN. IF THE LIQUID IS ANYTHING BUT WATER AND/OR ALCOHOL, A QUALIFIED SERVICE TECHNICIAN SHOULD EXAMINE THE AMPLIFIER BEFORE IT IS USED AGAIN. DO NOT PLACE NAKED FLAMES, SUCH AS LIGHTED CANDLES ON THIS PRODUCT. DO NOT REMOVE THE COVER, OR ATTEMPT TO MODIFY OR REPAIR THE AMPLIFIER YOURSELF. REFER ALL SERVICING TO A QUALIFIED TECHNICIAN. Your Myryad Power Amplifier is supplied complete with the following accessories: -My-Link interconnect (0.5m RCA-RCA) -Separate mains power cord to suit country of sale. INTRODUCTION INSTALLATION AND SAFETY NOTES ACCESSORIES