Table of contents Table of contents General information..........................4 1.1 Further information........................... 5 1.2 Notational conventions........................6 1.3 Symbols and signal words....................... 6 Safety instructions............................. 8 Features............................... 12 Installation..............................13 Connections and controls........................15 Technical specifications........................18 Plug and connection assignment....................20 Troubleshooting............................
General information General information This manual contains important instructions for the safe operation of the unit. Read and follow the safety instructions and all other instructions. Keep the manual for future reference. Make sure that it is available to all those using the device. If you sell the unit please make sure that the buyer also receives this manual.
General information 1.1 Further information On our website (www.thomann.de) you will find lots of further information and details on the following points: Download This manual is also available as PDF file for you to download. Use the search function in the electronic version to find the topics of Keyword search interest for you quickly.
General information 1.2 Notational conventions This manual uses the following notational conventions: Letterings The letterings for connectors and controls are marked by square brackets and italics. Examples: [VOLUME] control, [Mono] button. 1.3 Symbols and signal words In this section you will find an overview of the meaning of symbols and signal words that are used in this manual.
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General information Signal word Meaning DANGER! This combination of symbol and signal word indicates an immediate dangerous situation that will result in death or serious injury if it is not avoided. CAUTION! This combination of symbol and signal word indicates a pos- sible dangerous situation that can result in minor injury if it is not avoided.
Safety instructions Safety instructions Intended use This device is primarily designed for monitoring during audio recording and mixing in the studio. Use the device only as described in this user manual. Any other use or use under other operating conditions is considered to be improper and may result in personal injury or prop- erty damage.
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Safety instructions DANGER! Electric shock caused by high voltages inside Within the device there are areas where high voltages may be present. Never remove any covers. There are no user-serviceable parts inside. Do not use the device if covers, protectors or optical components are missing or damaged.
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Safety instructions NOTICE! Risk of fire Do not block areas of ventilation. Do not install the device near any direct heat source. Keep the device away from naked flames. NOTICE! Operating conditions This device has been designed for indoor use only. To prevent damage, never expose the device to any liquid or moisture.
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Safety instructions NOTICE! External power supply The device is powered by an external power supply. Before connecting the external power supply, ensure that the input voltage (AC outlet) matches the voltage rating of the device and that the AC outlet is protected by a residual cur- rent circuit breaker.
Features Features 2-way system: 3 1/2" woofer and 3/4" tweeter 1/4" and RCA inputs The package includes one active and one passive speaker box, one power adapter and one suitable connector cable. active studio monitor...
Installation Installation Unpack and carefully check that there is no transportation damage before using the unit. Keep the equipment packaging. To fully protect the device against vibration, dust and moisture during transportation or storage use the original packaging or your own packaging material suitable for transport or storage, respectively.
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Installation NOTICE! Use of stands When mounting the device onto a stand, ensure that the stand is in a safe and stable position and that the weight of the device does not exceed the maximum permissible load capacity of the stand. active studio monitor...
Connections and controls Connections and controls MM-3...
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Connections and controls 1 [POWER] Main switch. Turns the device on and off 5 [DC 18V] Connector for the supplied power supply adapter 2 [TRS (BALANCED)] Connection for balanced input signal, designed as 1/4" phone sockets 3 [RCA (UNBALANCED)] Connection for balanced input signal, designed as RCA sockets 4 [VOLUME] Volume control 6 Bass-reflex opening...
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Connections and controls 7 [OUTPUT TO PASSIVE SPEAKER] Cable clamps to connect the passive speaker box 8 [INPUT FROM POWERED SPEAKER] Cable clamps to connect the active speaker box MM-3...
Technical specifications Technical specifications Speaker 3 1/2" woofer and 3/4" tweeter Frequency range 75 Hz … 20 kHz Crossover frequency 2,7 kHz Inputs 1/4" phone socket (balanced), RCA (unbalanced) Output power 2 × 30 W (peak) 2 × 25 W (RMS) Maximum sound pressure level in 1 m distance 88 dB ±...
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Technical specifications Dimensions (B × H × T, per box) 140 mm × 200 mm × 165 mm Weight Active speaker box: 2.3 kg Passive speaker box: 2.1 kg MM-3...
Plug and connection assignment Plug and connection assignment Introduction This chapter will help you select the right cables and plugs to connect your valuable equip- ment in such a way that a perfect sound experience is ensured. Please note these advices, because especially in ‘Sound & Light’ caution is indicated: Even if a plug fits into the socket, an incorrect connection may result in a destroyed power amp, a short circuit or ‘just’...
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Plug and connection assignment Since the interference affects both cores equally, by subtracting the phase-shifted signals, the interfering signal is completely neutralized. The result is a pure signal without any noise inter- ference. 1/4" TS phone plug (mono, unbalanced) Signal Ground, shielding RCA connection Drawing and table indicate the pin assignment of an RCA plug.
Troubleshooting Troubleshooting In the following we list a few common problems that may occur during operation. We give you some suggestions for easy troubleshooting: Symptom Remedy The unit does not work Check the power supply terminal and the position of the power switch.
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2. Make sure that all audio devices are connected to the same power circuit and thus share the same ground ref- erence. If the procedures recommended above do not succeed, please contact our Service Center. You can find the contact information at www.thomann.de. MM-3...
Protecting the environment Protecting the environment Disposal of the packaging mate- rial For the transport and protective packaging, environmentally friendly materials have been chosen that can be supplied to normal recycling. Ensure that plastic bags, packaging, etc. are properly disposed of. Do not just dispose of these materials with your normal household waste, but make sure that they are collected for recycling.
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