Below are some of the FAQ provided by favorini et al.FAQQ: Which speakers does ARC work well with?
A: Nick@Anthem says:"ARC works with ALL
speakers, within the speaker's limits."MRX Quick Setup Guide and General Questions about ARC Calibration
A: See the following posts by Tigger:http://www.avsforum.com/avs-vb/showp...postcount=3849http://www.avsforum.com/avs-vb/showp...postcount=3875http://www.avsforum.com/avs-vb/showp...postcount=1797http://www.avsforum.com/avs-vb/showp...postcount=3740http://www.avsforum.com/avs-vb/showp...postcount=4137Q:What is Room Gain?
A: Follow this link for Information on Room Gain http://www.avsforum.com/avs-vb/showp...postcount=5489Q:Where can I download the latest firmware?
A: It can be downloaded Here v.50.25, (Aug.9/2012) and v.1.1.0 Multimedia(March,31,2011)Q: Where can I find more technical specifications?
A: Check the Specifications section (page 39) in the manual. HereQ: Do the MRX 300/500/700 have the same preamplifier and video sections?
A: Yes.Q: Do the MRX 300/500/700 support HDMI pass-through when powered off?
A: Yes, only if CEC is turned on in the setup menu. If CEC is off, they will not pass the signal through.Q: Do the MRX 300/500/700 have the same ARC implementation?
A: Yes.Q: How does the MRX 300/500/700 ARC implementation compare to D2v/AVM50v?
A: ARC consists of software that runs on a user-supplied computer which calculates a room correction solution and a DSP chip in the receiver which implements it. The ARC software is the same for all Anthem A/V receivers and processors. The MRX DSP is about half as powerful as that in the D2v/AVM50v.
Nick @ Anthem elaborates: Here
MRX 300/500/700 DSP has around the same amount of number crunching ability as anything in the price range, which is around half as much as AVM/D prepros using ARC (and PBK for that matter), which have as much as pro systems in the five figures. This means that MRX 300/500/700 corrected response usually does not meet target response as closely as AVM/D, though it's also usually not too far off.
The other difference is that correction range not only defaults to 5 kHz but cannot be made to go higher. Correction above 5 kHz is not normally recommended regardless.
Another difference not dependent on ARC is that MRX DSP uses crossover frequencies of 60, 80, 100, 120, and 150 whereas AVM/D allows 25-160 in 5 Hz steps. It relates because ARC selects the crossover frequencies based on in-room measured response.
The practical difference depends on the amount of correction the room speaker/combo needs, and this varies greatly. MRX-ARC still improves things regardless, using the same principles as the other ARC.Q: Should any Sub EQ be run in addition to running ARC?
A: Nick @ Anthem says
With MRX and one sub - it depends on the room/speaker combo. You have to try and compare. PBK has twice the number crunching ability that ARC sub channel does, MRX-wise.
With multiple subs - balance levels to one another, match phase too if you're into tweaking, run PBK on each if available, run ARC on the lot either way.
With other sub EQ systems - you have to try and compare but always run sub EQ before running ARC. If you then turn off sub EQ, run ARC again. ARC has to hear the sub in the form it's in when playing movies and music. If it hears the wrong thing it'll correct the wrong thing. Since there are two ARC memories, Movie and Music, you might want to use one with sub EQ and the other without.
With subs that have considerable response below 20 Hz it might help to set sub hi-pass filter to Flat. This is in the advanced targets of ARC and PBK.
Nick @ Anthem adds
Filters are allocated per channel and they're never unused in the sense that their object is to get response as close to target as possible.
If response is nasty enough such that both systems are needed to fill in a very deep notch, say 12 dB, then the best thing to do is reposition the sub where possible and avoid the issue (in each system gain limit is 6 dB by design). This is where Quick Measure comes in. If it's not possible to move the sub and response is this bad then using both EQs might be the answer (worst-case and I've never come across it).Bob Pariseau addresses multiple subs
.Q: What is the difference between Crossover and Cutoff as they apply to ARC implementation?
A: Bob Pariseau says
"For a main speaker, the Cutoff is the lowest frequency where ARC applies resources for correction. Think of it as the other end of Max EQ Frequency. I'm not sure, but I suspect there's actually at least an octave of slop in there rather than it being a hard stopping point. I.e., application of correction resources sort of rolls-off below that frequency.
The Crossover is where ARC imposes a roll-off -- an attenuation -- of the bass output of a main speaker -- i.e., because the bass is being steered to the subwoofer. The roll-off is 12dB per octave as I recall. That is at half the Crossover frequency the speaker output will be 12dB below the basic volume level of the ARC solution (with possible adjustment for Room Gain).
In the current ARC version, the Cutoff and Crossover for the main speakers are ALWAYS set the same. Which makes sense. If ARC isn't going to correct that speaker very far below the Cutoff frequency, then you want the output of the speaker below that point to be attenuated. Which is just what the Crossover does. So if you alter the Cutoff for a main speaker in the Targets window, you are ALSO altering its Crossover. This will be readily visible in the shape of the new Targets curve.
The same sort of thing happens for the Subwoofer, but at the HIGH frequency end of its output. Think of the Cutoff of the Subwoofer as kind of like Max EQ Frequency for the sub.
One big difference is that the current version of ARC allows the sub Cutoff and sub Crossover to be DIFFERENT. ARC controls the Crossover (since allowing you to alter it would over-constrain the solution -- i.e., the Crossover needs to be set in a way that works with what's going on with the main speakers). But you can tweak the Cutoff.
ARC itself often uses this freedom to improve the solution. Typically the sub's Crossover will be set at a lower frequency than the Cutoff. This attenuates the high end output of the sub, but still allows correction resources to be applied above that point."An EXCELLENT overview of Crossovers and Cutoffs from Bob Pariseau at this link http://www.avsforum.com/avs-vb/showp...postcount=5762Q: Do the MRX 300/500/700 pass through unsupported video formats?
A: Nick @ Anthem says[/b]http://www.avsforum.com/avs-vb/showp...postcount=1086
Q: Do the MRX 300/500/700 support video pass-through when powered on?
A: Yes, changing Setup > Video Output Configuration to Through will bypass the video scaler.Q: Does Dolby Volume default to off?
A: Yes, with firmware v.50.00 or later.Q: What serial commands are available?
A: Nick @ Anthem lists the current commands
Serial commands are slated to be expanded considerably in around three months.Q: Do the MRX 300/500/700 support IP control?
A: No.Q: Why don't the MRX 300/500/700 come with a USB cable instead of a serial cable?
A: Nick @ Anthem says
USB cable limit is 12 feet due to the bandwidth, and some equipment rooms are several times that away from the listening room.Q: How do you change Audio modes on the fly?
A: Press "Audio" then use the up/down keys to select surround modeQ: Reading through the manual it appears that DPLIIx cannot be applied to DTS 5.1 sources? Curiously, DPLIIz seems to be available. Why? Is this an oversight in the manual?
A. Nick said
, PLIIx needs back channels. PLIIz needs ceiling channels, with or without back channels. The DSP cannot apply certain processes to certain other sources, not just this case (and not so in AVM/D). It is as the manual says. (This is documented in section 3.6 Listening Mode Presets on page 21 of the manual.)[/i] It's an on-the-fly option depending on software version. If running v50.12 or later, set the DTS menu option to "Last Used" (this means the preset is disabled) then when a DTS 5.1 movie is playing select Dolby Pro Logic IIx via the Audio and up/down buttons. The Audio button has to be pressed a couple of times to get to the mode selection. For subsequent DTS 5.1 movies the on-the-fly setting will remain.
In other words it's not on the preset menu list under DTS but it's on the on-the-fly Audio button list while DTS is playing.Q: Is there a recommended burn-in time for the MRX receivers?
A: Nick @ Anthem says: There isn't. Countless Audio Precision measurements show the same results regardless of time in use. Same with previous models.Q: Can the MRX be used with 6.1 speaker setup?
A: You can use the MRX with 6.1 setup. To do this hook rear speaker to either back channel. Then engage DD EX or Neo 6, both of which are 6.1 formats(mono to back channels) Do not use DD PLIIx as it is a 7.1 format. (From Nick@Anthem)Q: What is the best way to get Technical Support?
A: Check this Link. http://www.avsforum.com/avs-vb/showp...ostcount=32347Q: How do I set up my Harmony Remote to work with my MRX receiver?
A: Tigger has provided these helpful tips. http://www.avsforum.com/avs-vb/showp...postcount=5878Q: What does a good Sub chart look like when measured with ARC?
A: Jayray has posted a picture, at the bottom of the page, of such a chart.Q:Tips for locating your sub - What is a Quick and Easy way to find the right place in your room for your sub?
A: Check out these links from Bob Pariseau and Obsidian for the tips.http://www.avsforum.com/avs-vb/showp...postcount=6198http://www.avsforum.com/avs-vb/showp...postcount=6199http://www.avsforum.com/avs-vb/showp...postcount=6200http://www.avsforum.com/avs-vb/showp...postcount=6203Q: Where can I get some information on the upcoming MDX-1 iPod Dock?A:http://www.avsforum.com/avs-vb/showp...postcount=2892