Anthem MRX Receivers - 300, 500, 700 Owners Thread & Tweaking Guide - Page 194

Originally Posted by WiWavelength

Hanser, thanks for querying Anthem. Unfortunately, Anthem's answer is a poor one on several counts:

1. Noise would cause a positive linearity error, not a negative one, as Sound and Vision measured. As it stands, the MRX series has the low level linearity performance of a circa 1990 CD player. See an example graph below:



http://www.stereophile.com/content/n...r-measurements

2. Even if noise were somehow the cause, it should not swamp the output below -80 dBFS. That would be 13-14 bit equivalent performance, unacceptable for components the caliber of the MRX series.



AJ

Originally Posted by hamptons

Those who have listened to the Anthem Logic Music, what is your verdict: do the rear surround speakers sound louder than the main front speakers when listening to music?

Originally Posted by svphile

Let me clarify,

I've been running 40.5 since I purchased my mrx300 without issue.

This morning, very random, I powered on my mrx300 and it behaved as if it didn't have any FW. I could scroll certain functions but they were all defaulted values and useless. All inputs would switch but would not recognize sources. It wouldn't pass video or display setup menu.

The first time I powered down it said mrx500 powering off. Strange! I then power cycled a couple times and nothing changed. However, it was displaying mrx300.

I finally figured out how to factory reset and I was back up again. FW in menu said 40.5

At this point I decided to update FW to 50.1, reload my arc measurments with a slight tweak I'd been wanting try, and restored all my menu options they way I like them.

All seems well now. Here is to hoping that never happens again.

The only thing I'm noticing is my 300 doesn't always recognize incoming audio signal properly when it is powered on after source. It will either display no audio or 2 ch pcm instead of DD/DTS. If I power on mrx300 first and source second I don't have any issues with my 300 detecting correct audio stream.

Hope this can help someone else if they ever have similar issue. However, it seems pretty random and I can't recall ever reading anything similar.

I will let Anthem know for sure. I'd like to know what they think might have caused such a bizzare glitch.

Originally Posted by svphile

Anthem told me to try 50.11 FW. No explanation or insight as to what caused the problem. I'm not saying they need to allocate undue resources to my case but a little elaboration would have been nice.

I'll definetly try it. However, this type of response tells me they don't believe previous FW versions are very stable.

Something caused the issue and it wasn't user error. If it is an isolated incident then there isn't a problem. However, if problems persist more information and explanation are required.

Originally Posted by iamcdn22

Has that firmware been released? I've only seen 50.04 and heard of the 50.10 beta testing.

Originally Posted by iamcdn22


Has that firmware been released? I've only seen 50.04 and heard of the 50.10 beta testing.

Originally Posted by hamptons

I listened to the Anthem Logic Music again last night in a different seating position. This time I sat between the two main front speakers with the surround rear back in between. I am glad to say I can hear a fuller sound coming from the front speakers. Last time, I was sitting too close in a corner with one of the rear surrounds directly facing my ear. I thought the ARC would have "calibrated" the sound after "correcting" all the speakers location with the result that regardless of where one sits, one would get a "balanced" sound from any of the listening modes. Is this a correct assumption to make? Thanks.

Originally Posted by sukumar

I have following speakers
Paradigm Studio 100, center 690, Sub 15

I did run setup of ARC first time. Here are the graphs





What is your opinion? I did it to learn how to do ARC. I need to fix these and run again.

1. Side rears are at ear or lower level now. Need to install at 6 feet high
2. Center (690) is on the floor and need to rise at least 2 or 3 feet to just touch bottom of the screen
3. I only have one sofa and just took two more positions next to it.

It uploaded automatically. I thought it will ask me before upload. I also did not see the parameters screen. I am also not sure whether ARC is applied to movie or music configuration.

Appreciate any input. I will start reading the graphs in the forum.

Originally Posted by rwheelwright

My only suggestion is to check your sub. It seems to have great output from 20Hz till about 50Hz where it starts to fall flat. Maybe a crossover on the sub. If you run Arc in automatic mode it will do everything for you. Then you can go look at targets, etc...

Originally Posted by sukumar

I have following speakers
Paradigm Studio 100, center 690, Sub 15

I did run setup of ARC first time. Here are the graphs

What is your opinion? I did it to learn how to do ARC. I need to fix these and run again.

1. Side rears are at ear or lower level now. Need to install at 6 feet high
2. Center (690) is on the floor and need to rise at least 2 or 3 feet to just touch bottom of the screen
3. I only have one sofa and just took two more positions next to it.

It uploaded automatically. I thought it will ask me before upload. I also did not see the parameters screen. I am also not sure whether ARC is applied to movie or music configuration.

Appreciate any input. I will start reading the graphs in the forum.

Originally Posted by jayray

Automatic is when ARC does everything for you including upload the correction file. Your sub could also be in a bad location. When you get the right spot the Red measured curve will likely be close to flat from 100 Hz to 20Hz. I have the same speakers and had a sub 15. Trust me, it will do more in a better spot. Your other speakers look very good.
John

Originally Posted by sukumar


Jayray,
Thanks for the feedback. I am also reading post from Tiger. I will run advanced mode also.

I put the subwoofer next to right speaker. I don't know what are settings in the back of subwoofer(knobs). I will look at it today. I will try with this settings.

Knobs on subwoofer
volume: 1/2
phase: 0 ( I found 0 if they are at the front, 180 if they are in the back)
crossover: Bypass

I will verify following in speaker configuration
Subwoofer crossover: 100hz

Where did you place your subwoofer? Do you think I can try move it back. It also reduces cable length. If so, I will set phase to 180.

Appreciate for sharing so much information on the forum. I read lot of your postings.

Sukumar

Originally Posted by Brian-HD

As per Anthem with the 50.11, setting the video signal to any resolution signal while playing blu ray is still consider through mode. I asked this question about three times and the answer was no processing for video signal with blu rays 1080p/24.

Originally Posted by eric-t


How you doing Brian Can you elaborate a little more regarding this? Not sure what you are referring too.

Originally Posted by svphile

Any thoughts?

My mrx300 is still having problems. I'm still running FW50.1 not FW50.11. It has wiped out some of my settings twice. The first time my personalized inputs defaulted to factory settings. I just re-named my inputs. This morning my wife called me at work and said she couldn't get audio. I figured it was an hdmi handshake so I told her to power down and back up. She did and it came up with the tuner displayed and all the inputs were back to default names i.e. Directv was sat. However, it did detect audio stream.

I won't be able to check this out in more detail untill later this evening but I believe the tuner coming up upon power up is the default when you do a facrory reset or power on for the first time.

I'm thinking about a replacement mrx300 at this point. I can't deal with a piece of gear this buggy.

Could the processor be going bad? The FW should be stable enough to not cause this kind of issue.

What doing fellas?

Originally Posted by jayray

Move sub to side wall pointing into the room. This is what I did and the results were amazing. I went up the wall 8 ft. but it will likely be different based on your room. Can you post your Target window so we can see where ARC set your sub cutoff and speaker crossover values.
John

Originally Posted by sukumar


I will try placing subwoofer side. I just checked current settings on sub woofer and every knob is in the middle. Here are the current values with which I tried ARC

Volume : half
Phase :90 (Assuming center is 90 ranging from 0 to 180)
crossover: 80 Hz (I see next one is 150 and last one as bypass)

Not sure this is why I got bad subwoofer curve.

I will try in the same position with phase 0 and crossover by pass. Once after ARC is complete, are these right values to keep them playing?

If I move sufwoofer to side pointing to other side wall, do I need to change phase?

Thanks,
Sukumar

Originally Posted by jayray

Turn phase to 0, bypass crossover. You don't need to change phase to start. Remember inches can make a big diff. 4 inches changed my results so experiment.
John

Originally Posted by sukumar

...do I need to change phase?

Originally Posted by sukumar

Thanks. I will try with these settings. When you write 4 inches means I am assuming move subwoofer 4 inches. By the way, what are you using to place center 690 higher. Those are on the floor and I want to elevate to 2 feet . I have screen above 2 feet.

Originally Posted by WonkyEwok

Can anyone tell me the power draw of CEC on an MRX amp?

Thanks

Originally Posted by jayray

I think it is equivalent to an incandescent bulb around 60W being on 24/7.
John

Originally Posted by hamptons

Help!!!! I turned on my MRX 700 last night and the front panel display shows "CD no signal". I was trying to play a CD from the Blu-ray player and there was no sound at all. I switched to tuner to test the system and also there was no sound at all. What could be wrong?? This is the first time it happened to me. Thanks.