My Marantz amplifier question, which is better, Marantz amplifier or NAD amplifier

Is your Marantz amplifier PM55? I also have a PM series. I forgot the model number!

Because it's been a long time since I've been home to play! Should yours be with tone, with OK function, with audio enhancement assist and remote control? If not.

Mine is. Your specific situation is that there is no other problem except that the voice is different from that of your friend, right? The acoustics of the Marantz series amplifier are good, but the requirements are original.

A first-class finished power amplifier does not need to be modified. Especially the original foreign ones, when they leave the factory, they have been tested by technical supervision and adjusted by the instrument. Unless you're not satisfied with yourself!

Unless yours is not original. The part of your friend's restructuring is nothing more than what we all know. What:

Adjust the bias current of the final stage, increase the voltage, adjust the resistance, capacitance, etc. Remember: if you don't have any instruments and equipment, don't move any layout of the original machine.

Moreover, everyone's standards for listening to voices are different. Of course, the comments are different, you should learn to listen first, understand the details of the frequency response of the audio, how much bass to reach, how much midrange, how much treble to reach, and how much the frequency response of the three registers should be tuned to really suit you. Don't be gullible and blindly follow and pursue, but also do what you can.

I haven't played in a long time! I want to play. But there was no time!!

Friends, have fun. The most important thing is to please your ears. More importantly, the frequency response range of the vocal range should be adjusted. ok

PM55 power amplifier, the pre-stage uses STK3048A for voltage amplification, and the rear stage is the original Toshiba C3280 and A1301

When the machine is turned on at high power, due to the increase in the output current of the post-stage, the voltage drop of the pre-stage causes the voltage amplification distortion of STK3048A, as long as we install an independent power supply. However, the space of PM55 is limited, so the positive and negative power supply of STK3048A is disconnected, and two 5401 diodes are connected to the disconnection (4 pins of STK3048A are connected to the positive pole of the diode, and the negative pole of the diode is connected to the positive power supply, and the 7 pins of STK3048A are connected to the negative pole of the diode, and the positive pole of the diode is connected to the negative power supply).Diode imitation is used"Independent power supply".

After this change, the pre-amplification voltage amplification is extremely stable both dynamically and statically, making the output cleaner and cleaner.

For those with strong hands-on ability, add a 22K resistor to the ground on the 14th and 2nd pins of STK3048A, and change the output to a super Class A combined power amplifier, but pay attention to the heat dissipation problem of C3280 and A1301 (add a fan).

Marantz, to be honest, I haven't touched this machine, it's a transistor amplifier or an electronic amplifier, if it's a transistor amplifier, the wiring should be changed to the power line, and the host and the radiator line are separated.

Ha ha. Better sound? It's too subjective!

Wider dynamics? What is dynamic? If you understand what dynamic means, you will naturally know how to improve.

Summary. Marantz amplifier is good, Marantz brand amplifier has a channel of stereo sound, most of the development amplifier has only two channels of output and the surround sound effect of the amplifier is different, HIFI amplifier pays more attention to high fidelity, and the sound quality is lower and more realistic restoration**.

The brand's power amplifier HIFI adopts a high-level pre-amp separation type, which can better ensure higher quality sound quality**. The amplifier's internal Super Dynamic Amplifier module can help produce a more dynamic and precise sound.

Which is better, Marantz amplifier or NAD amplifier.

Marantz amplifier is good, Marantz brand amplifier has a channel of stereo sound, most of the development amplifier has only two channels of output and the amplifier of the clear surround sound effect is different, HIFI amplifier pays more attention to high fidelity, and the sound quality is lower The sound is positive and more real restoration**. The brand's power amplifier HIFI adopts a high-level front and rear stage separation type, which can better ensure higher quality sound quality**. The amplifier's internal Super Dynamic Amplifier module can help produce a more dynamic and precise sound from the base oak.

Ask about custom messages].

Summary. Hello dear, glad to answer for you. Since the power amplifier is wired, it is necessary to find the control panel, the right channel, and the right channel, and the wiring ports of the left and right speakers.

Marantz amplifier connection method diagram.

Hello dear, glad to answer for you. Since the power amplifier is wired, it is necessary to find the control panel, the right channel, and the right channel, and the wiring ports of the left and right speakers.

Frontl connection (amplifier), FRO white connector (***), frontr connection (amplifier), FRO red connector (***), rearl connection (amplifier), surr white connector (***), rearr connection (amplifier), surr red connector (***), center connection (amplifier), cen connector (***), subwoofer connection (amplifier), S-woofer interface.

The CNE is the center speaker interface, the SURR is the surround speaker interface, and the FRO is the front speaker interface, and the SQ is the equalizer.

I hope I can help you above

Summary. Adjust the volume of the amplifier: Adjust the volume using Treble bass adjustment and bass treble adjustment to adjust the treble to the brightest and clearest.

1. The volume is in front of the voltage amplification part, which is mainly to amplify the tiny electrical signal to meet the needs of the post-stage circuit, and behind the volume is the current amplification circuit to meet the large current required by the power amplifier to push the speaker.

2. When the power amplifier is faulty, you can first input the human body induction signal at the signal input end, turn on the large potentiometer, if there is a significant change in the humming sound in the speaker, then the power amplifier is no problem, and the problem must be on your signal source at this time. If it is verified that the problem is on the power amplifier, the amplifier can input the induction signal step by step, and when the induction signal cannot be obtained in the horn, the problem is on the stage. 4、

Marantz amplifier and audio connection.

The Marantz amplifier is connected to the speaker, which is directly on the speaker box, and there is nothing else special. Only subwoofers must be active. However, from the audio source to the power amplifier, there are more options, you can use optical fiber cables, S terminals, lotus plugs, etc.

My amplifier and stereo are powered on, how do I turn on and play sound?

Adjust the volume of the amplifier: Adjust the volume using Treble bass adjustment and bass treble adjustment to adjust the treble to the brightest and clearest. It's okay to adjust the bass to a low but not stuffy one, and you can use DJ dance music ** to test the machine.

As shown in the figure Supplement: 1. The voltage amplification part is in front of the volume, which is mainly to amplify the tiny electrical signal to meet the needs of the post-stage circuit, and the current amplification circuit behind the volume is to meet the large current required by the power amplifier to push the speaker. 2. When the power amplifier is faulty, you can first input the human body induction signal at the signal input end, turn on the large potentiometer, if there is a significant change in the humming sound in the speaker, then the power amplifier is no problem, and the problem must be on your signal source at this time.

If it is verified that the problem is on the power amplifier, the amplifier can input the induction signal step by step, and when the induction signal cannot be obtained in the horn, the problem is on the stage. 4、

Song ordering machine, display screen, TV can play songs, that is, how can the audio amplifier start to release sound.

Is there no match.

I only have the amp on the socket, there is electricity, the stereo is a bit buzzy, the sound is very small.

Does the amplifier have an audio cable to the juke?

Is the sound wrong?

I'm not likely to install.

No problem with the stereo.

I think the sound didn't match.

Summary. The failure of the whole machine is manifested as the amplifier has no display after power-on, the function keys are invalid, and there is no sound, just like when the power is not on.

The power supply circuit should be checked first when overhauling. You can use a multimeter to measure the DC resistance value at both ends of the power plug (the power switch should be turned on), and the resistance value should be hundreds of ohms under normal conditions. If the measured resistance value is much smaller, and the power transformer is seriously heated, it means that there is a local short circuit in the primary circuit of the power transformer; If the measured resistance is infinity, check whether the fuse is blown, whether the primary winding of the transformer is open, and whether there is a broken wire between the power cord and the plug.

If the resistance values at both ends of the power plug are normal, the output voltage of each power supply circuit can be measured by powering up. For microprocessing using system control.

amplifier or logic control circuit, the control electrical should be checked.

Whether the supply voltage of the circuit (usually +5V) is normal.

If there is no +5V voltage, the input voltage of the three-terminal regulator integrated circuit 7805 should be measured to see if it is normal, and if the voltage at the input end is abnormal, the rectifier and filter circuit should be checked. If the voltage at the input end of the 7805 is normal, and there is no 10V voltage at the output terminal or the voltage is low, the load can be disconnected to see the +5V voltage energy.

Marantz amplifiers will not work.

The failure of the whole machine is manifested as the amplifier has no display after power-on, the function keys are invalid, and there is no sound, just like when the power is not on. The power supply circuit should be checked first when overhauling. You can use a multimeter to measure the DC resistance value at both ends of the power plug (the power switch should be turned on), and the resistance value should be hundreds of ohms under normal conditions.

If the measured resistance value is much smaller, and the power transformer is seriously heated, it means that there is a local short circuit in the primary circuit of the power transformer; If the measured resistance is infinity, check whether the fuse is blown, whether the primary winding of the transformer is open, and whether there is a broken wire between the power cord and the plug. If the resistance values at both ends of the power plug are normal, the output voltage of each power supply circuit can be measured by powering up. For amplifiers that use a system control microprocessor or logic control circuit, it is important to check that the supply voltage (typically +5V) of the control circuit is normal.

If there is no +5V voltage, the input voltage of the three-terminal regulator integrated circuit 7805 should be measured to see if it is normal, and if the voltage at the input end is abnormal, the rectifier and filter circuit should be checked. If the voltage at the input end of the 7805 is normal, and there is no 10V voltage at the output terminal or the voltage is low, the load can be disconnected to see the +5V voltage energy.

Give it a try.

Summary. Marantz power amplifier audio can not be turned on so pro, hello, I am happy to answer for you, Japan Marantz R8012 power amplifier can not start after powering on Answer: Generally, it is likely that the key switch is damaged or the power amplifier is turned on the protection state.

There are 3 states of protection status enabled:1Overcurrent protection usually has a fuse on the side panel of the power amplifier, when the power amplifier is damaged, there will be a large current, at this time the fuse blows to protect the car battery.

This only works after the amplifier fails. 2.Over-temperature protection Because the amplifier will generate heat when it is working, the surface of the amplifier will generate temperature when it is used, and the longer it is used, the higher the temperature will be.

The components inside will also get taller and taller. 3.Short circuit protection means that if the horn is short-circuited during installation, if you start the amplifier, the amplifier will automatically be protected.

One is to automatically restore the normal state after troubleshooting, and the other is to turn off the machine head (CD on the car, etc.), troubleshoot and then turn on the machine head to work normally.

What should I do if the Marantz amplifier audio can't be turned on.

Marantz power amplifier audio can not be turned on so pro, hello, I am happy to answer for you, Japan Marantz R8012 power amplifier can not start after powering on Answer: Generally, it is likely that the key switch is damaged or the power amplifier is turned on the protection state. The 3 states of the protection state are enabled:

1.Overcurrent protection usually has a fuse on the side panel of the power amplifier, when the power amplifier is damaged, there will be a large current, at this time the fuse blows to protect the car battery. This only works after the amplifier fails.

2.Over-temperature protection Because the amplifier will generate heat when it is working, the surface of the amplifier will generate temperature when it is used, and the longer it is used, the higher the temperature will be. The components inside will also get taller and taller.

3.Short circuit protection means that if the horn is short-circuited during installation, if you start the amplifier, the amplifier will automatically be protected. One is to automatically restore the normal state after troubleshooting, and the other is to turn off the machine head (CD on the car, etc.), troubleshoot and then turn on the machine head to work normally.

Marantz 4400 amplifier turned on*** There is no sound, but what should I do if there is sound on the radio.

Thank you, teacher. And the power amplifier volume control system is also displayed.

Regardless of whether the knob is turned to minimum or maximum or any middle segment, the speaker sound is at its maximum volume under normal conditions. 2. When the knob is turned to the minimum or maximum, the sound is slightly smaller; When the knob is turned to any of the middle sections, the sound is slightly louder and slightly muddy. 3. The fault of the knob potentiometer has been eliminated, and the resistance value of the potentiometer is measured with a multimeter.

Summary. Hello dear, 1Reduce the power supply voltage of the amplifier part, for example:

If the voltage of the power amplifier is positive or negative voltage 45V, the plus or minus 20V voltage is used for maintenance, which is safer. 2.When repairing the power amplifier circuit, be sure to short-circuit the power amplifier signal input to the ground.

What should I do if the Marantz amplifier audio can't be turned on.

Hello dear, 1Reduce the power supply voltage of the power amplifier part, for example: if the voltage of the power amplifier part is positive or negative voltage 45V, use the plus or minus 20V voltage to overhaul it, which is safer. 2.When repairing the power amplifier circuit, be sure to short-circuit the power amplifier signal input to the ground.

Excuse me, but please go into more detail?

Some power amplifiers cannot dismantle and repair the power tube, and after the power tube is removed, the midpoint voltage cannot be measured. The midpoint voltage is either positive or negative. And it is either positive or negative for the supply voltage.

The relay of the horn protection circuit cannot be engaged at the same time. Note! Buck repair may ensure that the relay of the circuit cannot be engaged.

This is normal. Do not suspect that the midpoint voltage is too high causing protection. 4.

If you are afraid of burning the power tube, you can do this: temporarily use the opposite tube 2SA SC2073 instead. Because the general home amplifier is not biased towards Class A.

The quiescent current is not large and will not burn the pipe, but the pipe must be attached to the heat sink. Don't make too much noise when trying out. Listen to the small horn.