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Anthem MRX Receivers - 300, 500, 700 Owners Thread & Tweaking Guide - Page 466

post #13951 of 16451
Thanks for the replies....yeah..no use tinkering with it...I'll try and save the current setting as was mentioned above. The new surrounds will be direct radiators from the same mfg and not quad polar design like the ones I'm using now...the difused sound of the latter had a huge hump around 200-300hz which was fixed by ARC...it will be interesting to see if the new speakers have the same inherent problem in room or will they provide a more neutral or flatter response helping the overall soundstage.
post #13952 of 16451
Quote:
Originally Posted by scirica View Post

This is new to me, so I instantly went to my MRX-500 and "saved user settings". To be clear, does this mean I can upload a new ARC file, decide I don't like it and then go back to these saved settings via the "load user settings" option? And that is a full ARC file?
I could be wrong about it saving ARC. It might just be the menu settings.
post #13953 of 16451
Quote:
To be clear, does this mean I can upload a new ARC file, decide I don't like it and then go back to these saved settings via the "load user settings" option?

If you have your saved ARC files on your laptop you can choose to upload whichever one you want.
post #13954 of 16451
Quote:
Originally Posted by scirica View Post

This is new to me, so I instantly went to my MRX-500 and "saved user settings". To be clear, does this mean I can upload a new ARC file, decide I don't like it and then go back to these saved settings via the "load user settings" option? And that is a full ARC file?

This will not save ARC setting. ARC sets the crossovers and some other settings and these will be saved but the information ARC needs to correct the curves will not be saved. You have these settings on your laptop.

The easiest way to try a new config for ARC is to change either the movie or music config and leave the other alone. You can swap back and forth and see what you like better. You will then probable want to make the change on both and re upload. If you saved the original file before making any changes and you didn't like the changes you can just reupload it to get yourself back to where you were before trying a tweak.
post #13955 of 16451
The test tone is pretty trippy to listen to...
post #13956 of 16451
Quote:
Originally Posted by Nick @ Anthem View Post

I think you meant to say Parallel in the second part, and product divided by sum works only when there are two loads. It's a magic result - only in this case - of reducing a slightly more complicated formula that works with any number of loads and which can be found by searching "parallel impedance".

I would not connect two speakers to one amp channel unless you are sure of everything involved. Nominal impedance and minimum impedance can be very different - there's nothing to guarantee that just because a speaker is rated for eight ohms, it doesn't dip into the threes at some bass frequency. Parallelling two of those means dipping into the ones. Then there's reactance, which I won't get into here although it's usually shown in Stereophile test results.

In general MRX can handle four-ohm speakers but because there are so many unknowns I wouldn't use more than three of them - one for each front channel. For demos at the factory I normally hook up a pair of Paradigm Signature S8 to an MRX 500 in full range mode (no sub) and play bass-heavy music loudly enough to cause worried looks. One time a doubter followed the speaker cables to the rear panel, and still not satisfied, asked which of our sub models are wireless. Anyway, it was one large speaker playing down to around 27 Hz on each of two channels.

Good Catch Nick! And thanks as always, updated the post!
post #13957 of 16451
Quote:
Originally Posted by mhuk View Post

If you have your saved ARC files on your laptop you can choose to upload whichever one you want.

Thanks, but that's not what I was asking. I understand the pc side of this. I was trying to understand what was "saved" when save user settings was invoked in the Anthem menu system.
post #13958 of 16451
Quote:
Originally Posted by scirica View Post

Thanks, but that's not what I was asking. I understand the pc side of this. I was trying to understand what was "saved" when save user settings was invoked in the Anthem menu system.

It only saves the menu settings, the ARC correction is stored in a separate area of memory, quite well protected, not even affected by loading new firmware apparently.
Regards, Mike.
post #13959 of 16451
Quote:
Originally Posted by AV_mike View Post

It only saves the menu settings, the ARC correction is stored in a separate area of memory, quite well protected, not even affected by loading new firmware apparently.
Regards, Mike.

Thanks MIke...good to know!
post #13960 of 16451
Quote:
Originally Posted by Nick @ Anthem View PostThe KEF LS50 has Nominal impedance of 8Ω (min. 3.2Ω) ...and that's the problem.

And why is that a problem!

post #13961 of 16451
Quote:
Originally Posted by wse View Post

And why is that a problem!

I believe Nick was commenting in the context of connecting two speakers in parallel to one channel of the amplifier. A speaker with a nominal impedance of 8 ohms that dips to 3.2 ohms at some frequencies shouldn't be a problem for the MRX. But if you connect two of those speakers in parallel, you'll have a 4 ohm load that drops to 1.6 ohms at some frequencies. Although the MRX is stable into 4 ohms, it may not be stable into 1.6 ohms, especially at higher volumes. The speaker may draw too much current from the amplifier and either cause damage, or cause the receiver's protection circuitry to activate and shut it down.

So I think the "problem" Nick was referring to was that, even though the nominal impedance of that speaker suggests that one could connect two of them in parallel to one amplifier channel, the fact that its impedance dips so low at some frequencies means that it may not be a good idea to do so.
post #13962 of 16451
Apologies if this is off-topic or has been covered in this thread but I'm building a pair of DIY subs that will be powered by a power amp, using the sub out from the MRX. If I model them in REW so that cone excursion is less than xmax can I rely on the MRX to EQ the subwoofers rather than using a Behringer FBQ1000 to provide EQ/ crossover? Is it suitable for both ported and sealed sub designs if the answer is yes?
post #13963 of 16451
Quote:
Originally Posted by mhuk View Post

Apologies if this is off-topic or has been covered in this thread but I'm building a pair of DIY subs that will be powered by a power amp, using the sub out from the MRX. If I model them in REW so that cone excursion is less than xmax can I rely on the MRX to EQ the subwoofers rather than using a Behringer FBQ1000 to provide EQ/ crossover? Is it suitable for both ported and sealed sub designs if the answer is yes?

The MRX will try to EQ anything it finds on the end of the sub output, so yes, you shouldn't need the Behringer. The default option for subs is for ARC to roll them off in case they aren't capable of handling low frequencies very well, but using the advanced options you can set the sub(s) to 'flat' if you think they can cope with input down to 20Hz and under. smile.gif
post #13964 of 16451
I'm going to contact Anthem support on this, but of course this is my "home" so I thought I'd ask here first. Lately, over the last week, I'm finding that when I turn on my Anthem either via remote or the button on the panel it is "dead". I have to unplug and re-plug it in and then it will turn on and everything is fine. No issues with performance once it is on, but I worry that this may be an early warning sign of something to come.

Am I the only one here that has experienced this?
post #13965 of 16451
Is it in standby mode? Does it still do this with all the HDMI inputs disconnected (could be handshake/ CEC related issue)?
Quote:
if you think they can cope with input down to 20Hz and under

Thanks for your reply smile.gif

It's an Infinity 120.9W which has a frequency response of 23hz-400hz, cone excursion for a sealed box is less than xmax in my WinISD model?
post #13966 of 16451
Quote:
Originally Posted by mhuk View Post

Is it in standby mode? Does it still do this with all the HDMI inputs disconnected (could be handshake/ CEC related issue)?

Was this meant for me? If so, I can say this isn't a hand-shake issue. The unit has been turned off via remote or front panel button. I come back and it is completely dead. Power cord brings it back to life.
post #13967 of 16451
Quote:
Was this meant for me?

Yes smile.gif

The HDMI suggestion was just in case something connected to the MRX by HDMI has put it in standby mode?
post #13968 of 16451
Quote:
Originally Posted by mhuk View Post

Thanks for your reply smile.gif

It's an Infinity 120.9W which has a frequency response of 23hz-400hz, cone excursion for a sealed box is less than xmax in my WinISD model?

Isn't that a car woofer, why are you using those for house subs? eek.gif

I used to be clued up about xmax and stuff but forgotten it all now. smile.gif Anyway I'm sure they'll be fine with the 'flat' setting in ARC.
post #13969 of 16451
@diablo676 : yes smile.gif

I've never built a DIY sub and this thread sounded intriguing - the 120.9W is close enough to that driver to give it a go, although I'd rather go for sealed as they take up less room and I don't have the need for max SPL. If it all goes wrong it won't have cost too much as I already own a Yamaha pro amp. If it goes well hopefully I will have learned enough to have a go with some more upmarket woofers biggrin.gif
post #13970 of 16451
Hello,

This is my first post in this thread. I am the owner of the Anthem MRX500 amp and I would like your input on my ARC charts.
I use the following equipment in my modest theatre:

Anthem MRX-500 Receiver
SubAmp 600 [for Sub]
Definitive Technology UIW RLS II In-Wall speakers (LCR) [Front Left, Center & Front Right]
Definitive Technology IWSub Reference In-Wall subwoofer
Paradigm Bi-Pole APD On-Wall (forget exact model number, about 8 years old) [Surrounds]
Sonance Original Series Medium 621 In-Wall [Rears]
Panasonic TC-P65VT50 Plasma

The theatre sounds great to my ears, but perhaps mainly because it is being compared to my last system that I gave to my sister when I upgraded.

Please let me know what you think of the charts and any suggestions that I may make to improve sound.

Cheers

Primary use is Blu-Ray movies and TV.








post #13971 of 16451
^^^ You'll want to also upload your target windows from ARC (off your PC) and then write down and list the Speaker level calibration under Speaker Configuration on the menu that appears on your TV (Setup Menu). Then the masters will go to work for you!

Congratulation on joining the club. I also have an MRX-500 and love it!
post #13972 of 16451
Quote:
Originally Posted by scirica View Post

Thanks, but that's not what I was asking. I understand the pc side of this. I was trying to understand what was "saved" when save user settings was invoked in the Anthem menu system.
I emailed Anthem for an answer to this a couple of days ago, but like all my other emails to Anthem support I never get a reply.
post #13973 of 16451
Quote:
Originally Posted by coresare View Post

The test tone is pretty trippy to listen to...
Ha!.. Tell me about it my beagle starting howling..had to kick her outside and start all over again
post #13974 of 16451
Quote:
Originally Posted by Legairre View Post

I emailed Anthem for an answer to this a couple of days ago, but like all my other emails to Anthem support I never get a reply.
That's a very good question, I was wondering that same thing..after I set my distance,video settings..etc etc..I pushed load user settings,then after running arc I pushed it again..um...I guess that's what its for..everything should be locked into place???
post #13975 of 16451
Scirica, Thanks. I'm such a newbie at this I didn't know I needed to include the Targets (or even how to find them).

Here they are:



This is what I have under Level Calibration

Dolby Volume Leveler Amount =5
Dolby Volume Calibration Offset = 0 dB
Noise Sequence = Off
Front Left = −3dB
Center = −1 dB
Front Right = −3 dB
Surround Right = +2 dB
Surround Left = +1 dB
Movie Subwoofer = +2 dB
Music SubWoofer = +2 dB
Aux Right = +3 dB
Aux Left = +3 dB

Also of Note, when I go into the Listener Position, I notice that the distances do not match the listening position of where I put the microphones. Is this a problem?


Cheers and Thanks
Edited by OttawaZoiks - 3/13/13 at 8:41am
post #13976 of 16451
Quote:
Originally Posted by OttawaZoiks View Post

Also of Note, when I go into the Listener Position, I notice that the distances do not match the listening position of where I put the microphones. Is this a problem?


/quote]

you have to set the listner position manually, ARC does not do that for you. If your up for it, set the listner positions, rerun ARC and let us know if ARC changed the speakers levels or other settings, I would be interested to know
post #13977 of 16451
No need to re-run ARC for listener positions (unless you like running it). Just update them and you are good to go.
post #13978 of 16451
So I posted my graphs in post 13931 on page 465 and I got a reply indicating:

"Does your sub have built-in protection? If it does, set the sub to flat, re-calculate, and upload the new file to your mrx"

I'm not sure what's meant by "built-in protection". Sorry I'm a rookie with this stuff. My sub is a B&W ASW CDM with the following specs from the back of the manual:

System Frequency Range -6dB at 15Hz and 40/140Hz adjustable (EQ at A)
System Frequency Response -3dB 20Hz – 31/110Hz adjustable (EQ at A)
Power output: 1000W continuous
Input impedance: 33kΩ
Signal / noise: >90dB
Functions: Input level
Low-pass filter frequency
Low-pass filter bypass
Bass roll-off alignment
Auto sense on/standby
Phase switch
Inputs: Line In (RCA Phono)
Outputs: Line Out (RCA Phono) high-passed
Link Out (RCA Phono)
Active 2nd-order, variable cut-off frequency
Active 3rd-order -6dB at 80Hz

So, can I (should I) set this to flat? I must confess I don't even know what setting to "flat" does. Any other thoughts on my graphs from post 13931 page 465?
post #13979 of 16451
Quote:
Originally Posted by Spleen Merchant View Post

So I posted my graphs in post 13931 on page 465 and I got a reply indicating:

"Does your sub have built-in protection? If it does, set the sub to flat, re-calculate, and upload the new file to your mrx"

I'm not sure what's meant by "built-in protection". Sorry I'm a rookie with this stuff. My sub is a B&W ASW CDM with the following specs from the back of the manual:

System Frequency Range -6dB at 15Hz and 40/140Hz adjustable (EQ at A)
System Frequency Response -3dB 20Hz – 31/110Hz adjustable (EQ at A)
Power output: 1000W continuous
Input impedance: 33kΩ
Signal / noise: >90dB
Functions: Input level
Low-pass filter frequency
Low-pass filter bypass
Bass roll-off alignment
Auto sense on/standby
Phase switch
Inputs: Line In (RCA Phono)
Outputs: Line Out (RCA Phono) high-passed
Link Out (RCA Phono)
Active 2nd-order, variable cut-off frequency
Active 3rd-order -6dB at 80Hz

So, can I (should I) set this to flat? I must confess I don't even know what setting to "flat" does. Any other thoughts on my graphs from post 13931 page 465?

Does your subwoofer have built-in overload protection that will shut itself down when its limits are about to be exceeded?

Based on the ARC measurements, your subwoofer looks quite capable.
post #13980 of 16451
That's where I'm stuck. I don't know how to determine whether my sub has 'built-in overload-protection'.
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