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Thread: Time for some upgrades!

  1. #41
    HDJ Platinum Club Member gadgtfreek's Avatar
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    Default Re: Time for some upgrades!

    werthliving.com

    Updates!

    1) I got the emotiva CMX-2 in, and it killed the transformer growl due to DC offset from the plasma. I won't be putting the AV7702 on it because the transformer is not toroidal. Check these audio files out LOL

    Hum
    https://www.dropbox.com/s/shevqhnhz049zom/Hum.m4a?dl=0

    No Hum
    https://www.dropbox.com/s/bgvzb0v69u...20Hum.m4a?dl=0




    2) Balanced XLR cables from BJC will be here tomorrow and I had some great discussion with Audyssey on how to handle the -12 bottomed out trim levels.

    Me:
    Once I complete XT32, and find one or more speakers at -12, should I use the Marantz AV7702's speaker/manual menu's test tone and adjust volume to 0.0db on the preamp, to figure out exactly what the -12 speaker is putting out? Or does it have to be a test disc from an external source?

    And just to make sure I am correct, if at 0.0 volume I found the one speaker to be 80db's, I would then go to the other speakers and adjust them to 80db's via the trim levels. Once they are all matched at 80db's, I would then turn the preamps volume down from 0.0 until they all read 75db's (say -5.0db was the result). -5.0db would need to be noted in the back of my head as the new "reference" volume for movies, etc... and not 0.0 on the preamp volume setting. I would also need to boost the sub +5db's as well?

    Thanks.

    Them:
    Hello,

    The internal test noise is -30dBFS pink noise, it is meant to be calibrated to 75dB(C, Slow) at the main listening position. You may use an external test disc if you prefer, the disc may use a different test noise level.

    If the lowest is 80 dB then yes match all speakers to that level and then remember that -5 dB master volume is reference level. Correct, the subwoofer would also need to be boosted 5 dB from the calibrated level to match the speakers.

    Best regards,
    Audyssey Support

    Anyone with Audyssey questions should try their Ask Audyssey system out, works well.

    https://audyssey.zendesk.com/home


    3) Will be ordering the larger RC64ii center soon.

  2. The Following 2 Users Say Thank You to gadgtfreek For This Useful Post:

    GOS (04-28-2015), SpHeRe31459 (05-01-2015)

  3. #42
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    Default Re: Time for some upgrades!

    1) If the hum is mechanical (that is, it's emanating directly from the amplifier's power transformer), it might be caused by voltage drop on the line rather than DC. (Never heard of a plasma injecting DC into the line but guess it could happen, though it suggests kind of shoddy power-supply design.) I was getting transformer buzz from my Outlaw 7125 when my plasma was on, fluctuating in intensity according to scene brightness. Outlaw suggested it might be voltage drop, and when I monitored the line I did see substantial fluctuation. Running the amp from a different circuit cured the problem, though that's not always practical. Hope it's actually the DC and the Emotiva device works for you. Let us know.

    2) Amplifier power should not affect trim levels. Gain might if Audyssey is trying to get some particular output level from some particular input level, but the primary goal should be to get the channels balanced. (What was the gain of your previous amp?) Where is it setting the trims for your surround speakers, and what are their sensitivities?

  4. #43
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    Default Re: Time for some upgrades!

    1) I did not see any issues on the AC side, but the DC side (with the plasma off) was a mostly steady reading. When the plasma was on it began to fluctuate, but if I hit a very bright scene (field of snow) the DC voltage went negative and then positive and then negative and then positive, and the transformers really growled in unison to the numbers moving up and down. I knew nothing of DC Offset, and when I had my 7125 it made a little racket but nothing substantial. Evidently the smaller the toroidal the less the effect. I tried a panamax and apc conditioner as well as both on my UPS (not at the same time), same results every time. So I punted and bought the emotiva cmx2. So far, day two, and the 7500 is quiet as a mouse. Since the cmx2 is specifically designed for DC offset, I gotta reckon that was it.

    It's an odd problem that most have never heard of, but digging on the web I found a good bit of info about DC offset and toroidal transformers making the "growl", and a few random posts on forums from plasma users. I spoke with Outlaw yesterday and told them everything I had done, if the cmx2 did not work their recommendation was an isolation transformer, which is also to combat DC.

    2) The previous amp was an XPA-3 with a 29 gain, the 7500 is 28 IIRC. Not sure what the 7125 was. With two different AVR's, the 7125 and the XPA3, the center was always around -9 to -8, not sure why it went -12 now. I changed a lot of stuff so it's hard to pinpoint what is going on. I will have my balanced cables in tomorrow, so I am going to run them and rerun audyssey, we will see what happens. The center itself seems to be fine and functioning properly.

    I do not have any rear speakers up right now, running a 3.2 system.

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    Default Re: Time for some upgrades!

    I'll have to look into a CX-2. Thanks.

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    Default Re: Time for some upgrades!

    Man, listened to some 2 channel music Wed night...

    The two 7ii's were kicking my seat with bass and the drivers were not putting in much effort, never heard 2 channel sound so good. It was actually so clean and the bass was so tight, I found once my subs were added it sounded worse!

    Very cool.

  7. #46
    Super Moderator GOS's Avatar
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    Default Re: Time for some upgrades!

    Whoa, really? So...what you gonna do about the subs? I assume you can dove tail them in with good results.


    Quote Originally Posted by gadgtfreek View Post
    Man, listened to some 2 channel music Wed night...

    The two 7ii's were kicking my seat with bass and the drivers were not putting in much effort, never heard 2 channel sound so good. It was actually so clean and the bass was so tight, I found once my subs were added it sounded worse!

    Very cool.
    Denon AVR-X4000 * Harmony ONE
    Klipsch RF-82 II front * RC3 center * RP3 surrounds * KEF HTS1001 rear
    Rythmik Audio DS1501 CI sub
    Oppo BDP-103
    Samsung LN46B550 LCD


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    Default Re: Time for some upgrades!

    Still sound great for HT, but I really like the 2 channel music with just the 7ii's.

    Found some more threads around where others have observed the same. One solution is to cross the subs/fronts lower for music so the sub is only playing the low stuff, but to be honest, with the amp it sounds so good in 2 channel I see no need to use the subs when playing 2 channel music from a cd or ipod.

  9. #48
    FATHER TIMELESS ImRizzo's Avatar
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    Default Re: Time for some upgrades!

    what did you do with the 4520 ?
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    Super Moderator GOS's Avatar
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    Default Re: Time for some upgrades!

    Quote Originally Posted by ImRizzo View Post
    what did you do with the 4520 ?
    He's giving it to me.
    Denon AVR-X4000 * Harmony ONE
    Klipsch RF-82 II front * RC3 center * RP3 surrounds * KEF HTS1001 rear
    Rythmik Audio DS1501 CI sub
    Oppo BDP-103
    Samsung LN46B550 LCD


  11. #50
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    Default Re: Time for some upgrades!

    Damn, the perks of a S/Mod

    Quote Originally Posted by GOS View Post
    He's giving it to me.
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    Default Re: Time for some upgrades!

    Quote Originally Posted by gadgtfreek View Post
    Still sound great for HT, but I really like the 2 channel music with just the 7ii's.

    Found some more threads around where others have observed the same. One solution is to cross the subs/fronts lower for music so the sub is only playing the low stuff, but to be honest, with the amp it sounds so good in 2 channel I see no need to use the subs when playing 2 channel music from a cd or ipod.
    I think this usually results from some sort of setup issue, or possibly just a preference for more bass with movies and such than with music. The best sound I've ever had on two-channel music has been with systems in which a subwoofer handles all the bass below 80 Hz or so.

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    Default Re: Time for some upgrades!

    Well, the other issue is this year there is no PLII music mode, it's called Dolby Surround and a LOT of people hate it.

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    Default Re: Time for some upgrades!

    Quote Originally Posted by gadgtfreek View Post
    Well, the other issue is this year there is no PLII music mode, it's called Dolby Surround and a LOT of people hate it.
    Dolby eliminated the PLII Music mode? That would be strange. It's the same as the PLII Movie mode with adjustments to some parameters. Dolby Surround decoding has been around since the early 1980s and is very basic -- no steering logic, mono surround channel. Haven't seen that for a long time. What products have it now?

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    Default Re: Time for some upgrades!

    Quote Originally Posted by MDRiggs View Post
    Dolby eliminated the PLII Music mode? That would be strange. It's the same as the PLII Movie mode with adjustments to some parameters. Dolby Surround decoding has been around since the early 1980s and is very basic -- no steering logic, mono surround channel. Haven't seen that for a long time. What products have it now?
    Anything with an Atmos decoder now gets a psudo-Atmos upmixing tech called simply Dolby Surround (which of course was already an older format, but Dolby is re-using the name), it seems to be targeted for movie applications and thus not be very great for 2-channel music.

    So people are stuck with changing which technology they use and have to switch to DTS Neo:X Music mode if you don't like what the Dolby Surround upmixer does. And of course a lot of people preferred how PLII handled things compared to DTS Neo:X, so it's a bummer for people who don't want to resort to straight 2-channel.
    Last edited by SpHeRe31459; 05-10-2015 at 01:50 PM.

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    Default Re: Time for some upgrades!

    Thanks for the clarification. That does kinda suck. Anthem has a nice up-mix mode called Anthem Logic-Music, but they don't do Atmos yet. And I always liked Lexicon's Logic7 better than PLII; maybe Harman will consider licensing it. But probably not. Given that all this stuff is just software now, it's odd that Dolby would throw away the PLII music mode. On the other hand, I guess it might get them out of paying licensing fees to Jim Fosgate anymore.

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    Default Re: Time for some upgrades!

    Thats kinda why I have been using pure for stereo, it sounds quite good on the new towers and the dual 10's have plenty of bump.

    Of course you can pay $199 for the Auro3D upgrade and supposedly Auro2D is better than dolby surround.

  18. #57
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    Default Re: Time for some upgrades!

    Center channel, done.


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    Default Re: Time for some upgrades!

    very nice, now it's time for an 80" LG OLED

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    Default Re: Time for some upgrades!

    LOL, maybe next year.

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    Default Re: Time for some upgrades!


    I hear ya !
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