Question about Audio & Video Receivers

1 Answer

I have Marantz tuner & preamp AC500 conected to 5 amplifiers and speakers in 13 rooms. System was working great for 12 years. Now, I have to reduce the volume on Marantz preamp, from 12 to 9 to avoid amplifiers clicking (going to prevent mode). Am I correct that preamp output changed for some reason so that I can't play as loud as before?? Do preamp deritoriate with time?? What should I do??

Posted by on

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Master
  • 1,512 Answers

Hi Andrew49

If all the amps are going into protection mode, then the preamp may be pushing a DC component with the signal. This is a little serious,and should be investigated further. There may be some deterioration in the electronics of the preamp causing this. I would suspect a leaky transistor or bypass/coupling capacitor in the DC coupled output stages. should not be too hard fix for a good HiFi tech.

I am more than happy to answer any other questions you may have about it, please get back to me here, or use the ASK function to go straight to me :) If you are still unsure, have problems, or we need to look at the situation more deeply, then before you give a rating for this advice, hit the ASK button Thanks for using FixYa, If you consider the advice I have given you as sound, a FixYa rating is a great reward for my efforts to help you. Cheers.

regards
robotek

Posted on Jul 13, 2008

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

After 5 min. working time(5 min after the receiver was switched on) the sound from the left speaker disappear.(no matter which surround mode i use). Any idea?Thanks


The simplest way to trouble shoot is to swap the speaker connections at the back of the amplifier. If the problem follows the speaker than a connection, possibly internal to the speaker fails as the speaker warms up(voice coil).
If this swap indicates that the amplifier is the problem swap the channel inputs to confirm that it is internal to the amplifier. Also try a different source to confirm it is not the output of the source.

If not, than the amplifier would appear to have a problem. This would most likely require a qualified technician to repair.

Tthese amps are robust and you may have to choose an alternative speaker pair(example sub-room or speaker set 2) to maintain the set up you have. Also a internally shorted speaker may have the impedance low forcing an output protection feature.
26121267-sv2pozd4hmoj1gs3kz5bhtfq-3-0.gif

Mar 07, 2016 | Marantz SR-5200 Receiver

1 Answer

Marantz Legacy Series - no sound is getting to speakers from tuner or cassette.


It seams like the amplifer is not working and you are right but it certanly needs to be measured first.

Nov 28, 2013 | Marantz Tr 2242 Sb Legacy Series Pll...

1 Answer

Marantz NR 1403 & Preamp - Volume cannot be controlled by receiver


The newer surround sound recievers will not work no matter what you try with them the way you have it hool up, they are not design to be useing a turn table on them that has a mgnetic cartridge ,Evan if you buy a phono preamp for it, you are just wasteing your time end money, I was a electronic tech for over 40 years ,Before i retired this summer, End no lots of people who tried to do the same thing your trying to do ,End It would not work,

Nov 26, 2012 | Marantz Audio & Video Receivers

1 Answer

Hi, I have a onkyo tx-27 quartz synthesized tuner amplifier and I'm trying to conect it to my tv , so I have the red and white cables and I did the conection with the speakers and there is no sound...


Well, the TX-27 has an onboard FM tuner. Is the amp working for IT? If not, you have an internal problem or a switch out of position. Turn the volume to something reasonable before troubvleshooting.



Jul 09, 2011 | Onkyo Audio & Video Receivers

1 Answer

Hi There, I have a Marantz SR7005 Receiver and Bose 901 Series VI speakers with the Bose equalizer. I'm struggling to figure out the best way to connect the Bose equalizer/speakers to the SR7005. ...


It sounds like you've read one of my many posts on 901 deployment in the AV world.

Functionally, what is the difference between one amp with 'x' channels or 'x' mono amps? Nothing. Pre-outs don't know or care what else an external amp does.

According to this link http://www.ecoustics.com/electronics/products/new/642968.html those amps are 2- and 5-channel, respectively.

There was a time when I had two bridged-mono Carver Cube atmps (at a real 400 watts) pushing one 901 each but that was big time overkill.

I now use a Carver AV-406 (functionally the same as your MM7055) with the 901 EQ in between the AV Receiver's front pre-outs and two 110-watt channels. Other channels on the AV-406 pull subwoofer and surround back duties. My AVR directly powers only the center and surround speakers.

The MM7025 would work for you.

Jul 07, 2011 | Marantz SR7005 Receiver

2 Answers

I am thinking of replacing my now very old JVC AX 330 amplifier with a Marantz PM7003 amplifier and want to know if this is a suitable replacement in terms of power output etc.


You, sir, are a rare adherent to stereo-only electronics. Are you replacing it for cause (showing its age)? The PM7003 is only 2 x 70 watts like the JVC but it also has separable preamp/amps so you COULD upgrade or augment the power output with external amps and still control it all locally.

Of course, any current AVR's do that too and bring digital sources and multichannel audio to the mix for as little as the PM7703 may cost.

Jun 23, 2011 | Audio & Video Receivers

1 Answer

Center channel dosen't work on 10 yr old marantz 500$ receiver. Should I just buy a new one?


I'd do some more investigation first. Have you determined if the amplifier for the channel works or if it's a preamp problem using the built-in speaker setup controls?

With this unit's great audio processing features you might be able to bypass a failed amplifier using the pre-outs and drive an external amp for the missing channel.

You could always just get a modest stereo amp (like a Carver M-100T and bridge it), or use the extra channel for another center speaker or a subwoofer, for example.

Aug 12, 2010 | Marantz SR5500 Receiver

1 Answer

No sound on SR18


One of your five amplifiers has blown its output transistors. Unfortuately, with SR18s, many components down the line from the outputs get fried as well, and (in my experience, anyway) it usually takes hours to track down all the problems. You can still use the unit as a preamp/tuner/surround processor by taking signal out at the pre-out jacks (you have to remove the five jumpers), and feeding it into external power amps, but repairs to the SR18's amp are probably going to be costly and complex. Sorry about the crummy news - hopefully I'm wrong!

Sep 03, 2009 | Marantz SR-18EX Receiver

1 Answer

Multi Room Function on marantz SR-19


Hi..
Put a RCA (phono cable) splitter at the pre-out /main in.
That way you can go to both amps with the same signal

Jan 14, 2009 | Marantz SR-19 Receiver

1 Answer

Marantz AC 500U


Hi

Sorry for the delay in getting back to you, you have an odd problem happening there, the pre-amp being the common denominator to the syptoms. Perhaps you could try reducing the attenuators to say 60% and retry at the same levels you used to use at the preamp. It is unlikely that there is a fault occurring that would increase the output of the preamp, more likely to be a DC component getting through. It could also be possible that the amps if all the same make and model have through over the period of installation developed the same fault.
There will have to be a common contributor to the symptoms. It is not uncommon for the same problem to affect a particular model at the same point of its life. Best approach and easiest to fault find it would be to change out the preamp with something similer to test the system and see what happens. At least tyouy will know where to start looking. Hope I have been able to help you, still happy to discuss it further. In the Free section our only reward is a FixYa ratings. Cheers

robotek

Jul 13, 2008 | Audio & Video Receivers

Not finding what you are looking for?
Audio & Video Receivers Logo

Related Topics:

101 people viewed this question

Ask a Question

Usually answered in minutes!

Top Audio & Video Receivers Experts

Donald DCruz
Donald DCruz

Level 3 Expert

17129 Answers

The Knight
The Knight

Level 3 Expert

68323 Answers

yadayada
yadayada

Level 3 Expert

61037 Answers

Are you an Audio and Video Receiver Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...