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USER MANUAL
GOLDMUND SRM250 Power Amplifier
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Congratulations. Thank you for purchasing the Goldmund SRM250 Power Amplifier. You have acquired the best Analog Power Amplifier ever made for professional and domestic uses. Please take some time to read this manual. It may provide you with useful information to make your pleasure of listening to the SRM250 even higher. INTRODUCTION The GOLDMUND SRM250 Power Amplifier Goldmund was founded in 1978 and has ever since been dedicated to the accurate reproduction of sound and image. At Goldmund, we
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W AR N I NG ! No connection or manipulation must be done before reading these instructions. Damage to the amplifier may result if the following instructions are not consciously understood and applied. This extremely high quality amplifier possesses new technical features which are a necessity for accurate sound reproduction in the best audio systems. Only careful installation and use can provide the satisfaction you are expecting. GOLDMUND SRM250 Power Amplifier The installation instructions mus
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CONTENTS 1 UNPACKING p 4 2 CHOICE OF AMPLIFIER LOCATION AND COOLING p 4 3 LINE VOLTAGE ADJUSTMENT p 5 4 CONNECTIONS p 5 5 AMPLIFIER CONTROLS p 6 6 SOUND QUALITY OPTIMIZATION p 6 Warm-up sonic effect. Speaker polarity. Mains line phase inversion. 7 SAFETY AND PRECAUTIONS p 7 Protection against DC. Protection against short-circuits. 8 MAINTENANCE p 8 9 TECHNICAL DATA p 8 - 9 Power Frequency response Analog input sensitivity Group delay Distortion Speed Noise Operating temperature Power supply Si
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UNPACKING 1 You will find in the GOLDMUND SRM250 box: ❑ The amplifier ❑ The power cord ❑ This manual and the warranty card ❑ Accessories and spare fuses WARNING PLEASE KEEP THE PACKAGING IN CASE YOU NEED TO TRANSPORT THE AMPLIFIER AT A LATER DATE OR IF YOU HAVE TO SEND IT FOR MAINTENANCE. THIS PACKAGING HAS BEEN DESIGNED SPECIFICALLY TO PROTECT THE SRM250 IN TRANSIT. USE OF ALTERNATIVE PACKAGING IS LIKELY TO RESULT IN DAMAGE, INVALIDATING WARRANTY COVER. CHOICE OF AMPLIFIER LOCATION AND COOLING
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LINE VOLTAGE ADJUSTMENT 3 A voltage selector is provided inside the amplifier. If your line voltage is not adapted to the voltage indicated on the serial plate of the amplifier, please consult your local GOLDMUND dealer for assistance. ATTENTION At the 220V position, the GOLDMUND SRM250 amplifier will function properly for main line voltages in between 200V and 240V. At the 110V position, the main line must deliver between 105V and 125V. If your AC line is usually outside of these tolerances,
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AMPLIFIER CONTROLS 5 On the front panel of the GOLDMUND SRM250 amplifier you will find only one switch and two Leds. To start playing the amplifier, turn the power switch ON. The amplifier is operative immediately and the green Led indicates it is operating normally. It is normal for a slight sound to be heard from the speakers when the amplifier is turned ON or OFF. The SRM250 is self-protected and the sound heard is corresponding to the charging and discharging of the capacitors. The yellow Le
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7 SAFETY AND PRECAUTIONS The GOLDMUND SRM250 is an extremely high speed amplifier. Any bad ground connection can generate high frequency oscillation which is dangerous for tweeters. It is also generally dangerous to run analog input cable and speaker cables in parallel for a long distance. If these cables are not of high quality or badly shielded, an “antenna-effect” can generate dangerous high-frequency oscillations. ❑ Protection against DC The GOLDMUND SRM250 is a DC-coupled amplifier. Without
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MAINTENANCE 8 The GOLDMUND SRM250 amplifier usually requires no maintenance. Always turn the power off before cleaning your amplifier. Use only a clean, soft, damp cloth. Dampen with water or a mild detergent solution. Avoid abrasive or harsh cleansers (eg. products containing sodium carbonate). 9 TECHNICAL DATA POWER • Nominal power before clipping: 200 W RMS (2 - 8 Ohms). 120 W RMS (1 - 16 Ohms). • Maximum power: > 400 W RMS (3 Ohms). • Maximum voltage: 55 V peak. Maximum current : > 15 A pe
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TECHNICAL DATA 9 DISTORTION Figures valid for all levels from 0 to 20 V / 8 Ohms. • Dynamic: TID < 0.01 % (- 80 dB). • Static: THD < 0.01 % (- 80 dB). SPEED • Slew rate: > 250 V/us • Rise time: < 250 ns. NOISE • Weighted ASA A: > 100 dB. OPERATING TEMPERATURE • Room temperature: -30 to +40 degrees Celsius ( -22 to +104 degrees Fahrenheit). • Internal temperature: +45 to +65 degrees Celsius ( +113 to +149 degrees Fahrenheit). POWER SUPPLY • Nominal line voltage: 117 or 234 V. • Input voltage rang
