How to troubleshoot no sound from Marantz Amplifier speakers?
If you're not getting any sound from the speakers connected to your Marantz Amplifier, verify the speaker connections and the connections to other devices. Also, make sure that the input selector matches the input connector (BALANCED or UNBALANCED) of the connected device.
How to fix a Marantz Amplifier that won't turn on?
If your Marantz Amplifier's power does not switch on, or it switches off immediately after being switched on, ensure that the power plug is correctly inserted into the wall socket. If the protective circuit has operated, remove the power plug from the wall socket and wait for at least one minute before re-inserting it.
How to troubleshoot no sound from Marantz Amplifier?
If there is no sound from the speakers connected to your Marantz Amplifier, first check the speaker connections and the connections to the other devices. Also, ensure that the input selector matches the input connector (BALANCED or UNBALANCED) of the connected device.
What to do if Marantz MM7025 Amplifier switches off with flashing standby indicator?
If your Marantz Amplifier suddenly switches off during use and the STANDBY indicator flashes quickly while the protection indicator flashes at a slower rate, the protective circuit has been activated. Unplug the amplifier from the wall socket, carefully re-examine the unit's installation, and inspect the speaker cable connections. If the problem persists after switching the power back on, contact the Marantz Service Center.
Why does my Marantz MM7025 power off suddenly during use?
If your Marantz Amplifier suddenly switches off during use, and the STANDBY indicator and protection indicator flash at approximately 0.5 second intervals, it could be due to several reasons. The internal temperature of the unit may have increased, causing the protective circuit to operate. Remove the power plug from the wall socket, wait until the unit's temperature has dropped, and then re-insert the power plug. Ensure the unit is installed in a well-ventilated location and that you are using speakers with the specified impedance. Also, check the speaker cables to ensure the core wires are not touching each other or the rear panel of the unit. If they are, remove the power plug, firmly re-insert the core wire, or fix the terminal before reconnecting it. Finally, try turning the volume do...
Warning about opening the unit and user-serviceable parts.
Warning against exposing the appliance to rain or moisture.
Caution against touching hot surfaces, especially marked areas.
Essential safety advice for operating the Marantz amplifier.
Important checks before turning the power switch on.
Steps to power on the amplifier from standby.
Steps to put the amplifier into standby mode.
How to enable and use the automatic standby mode.
Detailed technical specifications for the MM7055.
Detailed technical specifications for the MM7025.
General| Output level | 2.4 mV |
|---|---|
| Damping factor | 100 |
| Amplifier class | - |
| Frequency range | 20 - 20000 Hz |
| Output impedance | 30000 Ω |
| Input sensitivity | 1.2 mV |
| Audio output channels | 2.0 channels |
| Peak power per channel | 170 W |
| Signal-to-Noise Ratio (SNR) | 105 dB |
| Total Harmonic Distortion (THD) | 0.03 % |
| RMS power output per channel (8 Ohm) | 140 W |
| AC (power) in | Yes |
| Audio (L/R) in | 2 |
| Line inputs (RCA) | 1 |
| Speakers connectivity type | XLR |
| Material | Metal |
| Cooling type | Passive |
| Product color | Black |
| Connectivity technology | Wired |
| Power consumption (standby) | 0.4 W |
| Power consumption (typical) | 220 W |
Weight and Dimensions| Depth | 350 mm |
|---|---|
| Width | 440 mm |
| Height | 126 mm |
| Weight | 10500 g |
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