Marantz AV7005 - Page 295

Pull the trigger. Audyssey in the newer models will provide a noticeable upgrade in audio fidelity.

Since the SR5002 doesn't have Audyssey room equalization, modern Marantz receivers or pre/pros will sound better than the 5002 after their Audyssey calibration has been run. There's no reason to upgrade the amp, though.

yes, it will be worth the investment to attain Audyssey MultiEQ XT capability. Also you get network functions (ie. streaming, AirPlay, etc.,...)

I just wanted to say THANKS for the advice.!! LOL I think I will be picking up an AV7005 from Outlaw Audio before the end of the month. I see they have them for $1199 with free shipping. They are an authorized dealer, and I bought some gear there before. I remember them as being really good people to deal with. I have been hoping they might go down to like $999. It looks like the price is not going to go lower than $1199 on a new 7005 from an authorized dealer.

Quite a few people have reported that if you call an authorized reseller they'll often be willing to quote a lower price than what they're allowed to publish publicly. I don't know what Outlaw's policy is, though.

Call the hosts of this site, AV Science, and I bet you'll be quite wrong. That's where I got mine.

Update on my speaker buzz;

Having the Marantz 7005 connected to my Outlaw 770 amp with 2 or 3 foot XLR cables, and the amp connected to the 7 main speakers, and no other connections, the ere is nothing but dead silence.

Connect a HDMI from the Marantz to my Panasonic TC-P65S1 plasma without it being plugged into an outlet, no noise. Plug it into an outlet (same circuit as the Marantz) and the buzz appears.

I used a 3 prong to 2 prong adapter on the plasma, little or no difference n the buzz. Use a 3 prong to 2 prong adapter on the amp as well as the TV, buzz is 90% quieter.....

Someone called them on 11/1 and they didn't have any in. I wonder if they restocked or not.

you have a ground loop...

have you tried isolating the cable feed?

There are almost always pictures of the back panel of every audio component in its user manual. These can generally be downloaded from manufacturer web sites.

Lifting safety grounds with 3>-2 prong adapters is a bad idea from a safety viewpoint. Equipment with 3 prong power cords are generally made that way to meet safety and legal requirements. Circumventing them is like throwing all the life preservers on a boat overboard at the beginning of the voyage.

Ground loop isolators like these can really work:

Cable antenna isolator (often preferred because it is less likely to affect sound quality)

http://www.amazon.com/Viewsonics-VSIS-EU-Cable-Ground-Isolator/dp/B0017I3K9M/



Audio line level ground isolator (the good ones don't hurt SQ)

http://www.amazon.com/MCM-50-9040-ISOLATOR-CHANNEL-UNBALANCED/dp/B008I5RQO2

My power amp is also the Outlaw 770 and had the ground loop hum/buzz. The viewsonics isolator pictured above is what I bought and it took care of the problem.

Since we are troubleshooting today, I have an interesting problem. I have trouble listening to a source without firing up my projector! If I try to listen to a cd/sacd/streaming audio without turning on the projector the sound will cut in and out or not come on at all. I know it has something to do with the hdmi handshake. I can unplug the hdmi to the projector and the source will play. That's a barely manageable workaround. Is there a setting somewhere that I can change to alleviate the problem? Does anyone else experience this?

I also have to use a wireless transmitter (justSling) to send hdmi to the projector. I'm wondering if that is continuously transmitting and therefore causing the issue.

Any help is appreciated.

Have you tied unplugging the wireless transmitter from AC power? The power switch on most modern electronics sold in the U.S. does not remove power from all of the circuitry. There might be some HDMI circuitry still energized in wireless transmitter when you've "turned it off" which is confusing the receiver.

If that turns out to be the problem, then you might want to consider using a switched power strip for the wireless transmitter.

That's worth a try. I'll keep you posted.

Gary, I've have a similar issue. Try switching the monitor out to HDMI 2 rather than turn on your projector or unplug the HDMI cable. This is the workaround solution in my system, but it sure is a pain for anyone else that tries to use the system. And I only found it by chance.

In my system, when listening to a CD player or other audio source, I need to ensure the monitor out selector is set to Monitor 2, regardless of whether a monitor is even turned on in order to get any audio. Monitor 1 is connected to a DVI input on a projector (with HDCP), monitor 2 is an HDMI input on a small monitor that I use occasionally rather than the projector. I'm not sure why it matters which monitor is active to get audio (especially when both monitors are off), this setting should not matter for any source?

If I turn either monitor on and select the active monitor for output, audio continues so this only occurs if I have the monitors powered off. There is no logic to this functionality and I cant do anything about it, Marantz told me to buy a new projector.

I bet it's the wireless transmitter and you essentially have the same issue I do, if it ws hard wired it might go away. When I originally posted this on page 214, no one else in the thread had a similar experience - maybe if there's 2 of us, we can convince Marantz that it's a firmware issue?

At the least, I hope this workaround works for you.

Norm

I do have DirecTv, not cable. While the RG6 lines in the house do go to other DVRs and TVs and are active, for this set up it is not.

thought these isolators were only for "cable" and not for satellite systems. The cables for the sat sysytem (4 lines into the house) is grounded right after it enters the house, grounded to a water pipe.

My system is also on a dedicated circuit. The outlets have been and are good. All connections in the electrical panel are secure.

Repeating, nothing else was plugged into the TV or preamp other than than connectors from the preamp to the amp and the amp to the speakers. Connect 1 HDMI to the TV and the buzz appears, unless the TV is unplugged.
Edited by cp1966 - 12/7/12 at 12:50am

I forgot to mention that I connected the TV to a different outlet/different circuit, and it did not help. I also connected it to a different HDTV via HDMI in a different room on a diff outlet/circuit, and the buzz was still there, but not as loud.

Prior to this I was using an Onkyo PR-SC886 with NO issues.

This IS a ground loop from hell.....
Edited by cp1966 - 12/7/12 at 4:00am

I might have missed this, but did you try RCA's in between the AV7005 and the amps? (BTW, earlier in the thread, but XLR's can increase the noise floor with the AV7005. Ear-up-against-the-tweeter test.) Have you tried to contact Marantz to see what they say? Could indeed be a problem with how your AV7005 is grounded. Maybe the connection came loose inside or something. A kludge troubleshooting idea might be to connect a wire in between the AV7005 chassis and the plasma, have to get metal to metal, but that woul dtell you if somehow there's a "potential" in between the two that's being introduced somewhere.

I really should have figured this out by myself a long time ago but I cannot find it in the docs.

It seems my 7005 does not report 24p capability to my source (HTPC on hdmi5) unless I have video processing turned off (and therefore no OSD). It only reports 50p and 60p.

Both my displays (LG 55LW TV, Benq W6500 projector) do 24p fine.

Is this really how it should be? I thought the 7005's video processing would just scale the resolution but leave the frame rate alone.



Sent from my Xperia Arc S using Tapatalk 2
Edited by politby - 12/7/12 at 10:32am

You have no sat wires connected to it?

As of today when I unhooked the 7005 for replacement, the RG6 cables were connected to the DVR, but it was not connected to the 7005 in any way. However, in the recent troubleshooting that I have done, it was disconnected at some point. I even grounded it again near the DVR in addition to when it enters the home.

I received a replacement 7005. I am going to make another round of electrical checks before I hook it up.

Yeah, but was the DVR plugged in? (I.e., the DVR is plugged in, and the AV7005 is plugged in.)

But then if the AV7005 is indeed on a completely dedicated circuit, shouldn't matter. You're sure that the AV7005 AC circuit is separate from the DVR? I.e., different breakers?

Also, when you ground components, the ground has to be the same ground. IOW, if your entire house is grounded to a copper pipe, and the lazy sat people make their own ground by driving a stake into the ground, and then grounding the sat system to that ground, the grounds are not the same. You can still have a potential between them that causes a problem.

I'm still confident the problem is exactly what at least four of us in the thread have suggested we think the problem is. You aren't getting that ground loop problems come from having multiple ground potentials, some unintentional, not the "quality" and/or "location" of the ground(s) and can occur over any kind of wire, not just "the third prong".

That would be you creating yet additional ground potentials, exactly what you don't want to do!

^^^

yup...

First of all, I am very thankful for the responses and help!

I defintely was not trying to add another ground, I just thoght I would try that to help. I did not know it could possibly create a ground loop. The DVR is connected to the same Tripp Lite surge supressor & circuit as the rest of my gear. The circuit is dedicated to my home theater stuff.

Believe me, I am trying all sorts of things to fix this.

I am sorry, but when you say 4 people have suggested the problem is multiple ground potentials, do you mean too many electronic pieces have the 3 prong cords and there is nowhere for them to connect?

The sat installer ran a ground wire from the cable to a water pipe. As far as I know, I only have 1 "ground" rod just outside of the house, connected to the ground from my electrical panel.

6 weeks ago, when I had an Onkyo PR-SC886 preamp connected there was no buzz. Nothing else in the system changed. Now, there is a buzz with the preamp plugged in and connected to the amp, the amp plugged in connected to the speakers, and the preamp connected to the TV via HDMI (as well as another TV on a different circuit when I tested that but the buzz was quieter). Nothing else is connected to the TV or preamp. When I put on a 3 prong to 2 prong adapter on the amp, the buzz is quieter, and when I put another 3 t 2 prong adapter on the plasma, its almost completey gone. I have not yet tried connecting a ground from the preamp chasis to the TV yet.

Start unplugging things and see if the problem improves. Start with the audio and video cables plugged into your AV7005. Unplug them all except your amp and speaker cables and listen for the buzz. Raise the volume to 75db if you have to so you can confirm the buzz is gone. If there's no buzz then add in components one by one beginning with your sub. After your sub plug in your plasma and listen again. Next try your dtv box. If you notice a buzz after plugging something in make note of it, unplug it, and move onto the next component. If you hear no buzz then leave the component connected and powered on. Report back with your findings.

I've seen too many people, including myself, throw money at their ground loops only to find their problems not get fixed.

I really like this preamp, BUT;

If the new replacement I recieved still produces the buzz and I am unable to locate the cause to eliminate it, I will most likely sell my beloved Outlaw 7700 amp and buy a very nice top of the line receiver.....

#1:
#2:


#3:
#4:
#5:

Sorry M. Zillch, and I really am not trying to a smart Alec;

#1- I do NOT have cable, I have a DirecTv Sat service, and EVERY isolation transformer I have seen linked or seen is specifically for cable systems, they clearly state they will not work with Sats......If I missed something in that link to Amazon for the Viewsonic Isolator that does say it works with a Sat, I am sorry, but I thought it said it is for cable ONLY.

#2- Check to see if the buzz disappears when the cable/sat RF coax wire is disconnected from ALL devices in your system [TV, cable/sat box].

If I had not posted the result, it did not disappear, the cables were disconnected and the DVR was unplugged and the buzz was still present.

I did miss this response,

"It would be nice to think that everything connected to the same circuit breaker has "the same ground potential", however that's not always the case. Even two outlets in the same room may have a variation large enough to cause problems in some sensitive gear, and the Marantz is known to be a sensitive device. Try piggybacking all your various AC strips to each other and then the SAME outlet. If distant devices won't reach (sub? TV?) then don't even connect them to any AC outlet and see if the buzz is gone.


I can try this with the new unit and see if it sounds ok.


#3- I dont have cable, I have Sat system.

#4- I dont have cable,

#5- I dont have cable

I just received the new unit Friday and I will spend some time this weekend hooking it up. I am going to try connecting the Marantz to the amp via RCA unbalanced wires instead of the XLR cables.

Again, I sincerely thank you for the time spent offering suggestions. I have probably spent 5-7 hours at a minumum on this, probably more like 10-12 (time flies when your focused on something)