LSiM 706c out of phase in MCACC

dpowell
dpowell Posts: 3,050
Each time I run MCACC on my Pioneer, the utility thinks that my 706c is out of phase. I have not had this issue with previous center speakers and I have triple checked that the wiring is correct. I just select the option to move on and all sounds fine. I'm just wondering if anyone else has seen this issue?
____________________________________________________________ polkaudio Fully Modded SDA SRS 1.2TLs + Dreadnaught, LSiM706c, 4 X Polk Surrounds + 4 X ATMOS SVS PB13 Ultra x 2Pass Labs X1, Marantz 7704, Sunfire Signature Cinema Grande 400, ADCOM 7807, Panasonic UB420, Sony SCD-C333ES, EPSON Pro Cinema 6050
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Comments

  • Check polarity with a AA battery to see if Polk actually wired it out of phase. Who knows, they are made by humans.
    HT Optoma HD25 LV on 80" DIY Screen, Anthem MRX 300 Receiver, Pioneer Elite BDP 51FD Polk CS350LS, Polk SDA1C, Polk FX300, Polk RT55, Dual EBS Adire Shiva 320watt tuned to 17hz, ICs-DIY Twisted Prs, Speaker-Raymond Cable

    2 Channel Thorens TD 318 Grado ZF1, SACD/CD Marantz 8260, Soundstream/Krell DAC1, Audio Mirror PP1, Odyssey Stratos, ADS L-1290, ICs-DIY Twisted , Speaker-Raymond Cable
  • drumminman
    drumminman Posts: 3,396
    FYI I don't use the auto calibration set up with my Yammy AVR. I do it by ear and find it much more to my liking. I start with all speakers at 0 decibals and adjust levels from there. Also, I run everything large, even the surrounds. I've tried it the conventional way (mains large surround small) and like the way this sounds better.

    You might try it manually and see what you think.
    "Science is suppose to explain observations not dismiss them as impossible" - Norm on AA; 2.3TL's w/sonicaps/mills/jantzen inductors, Gimpod's boards, Lg Solen SDA inductors, RD-0198's, MW's dynamatted, Armaflex speaker gaskets, H-nuts, brass spikes, Cardas CCGR BP's, upgraded IC Cable, Black Hole Damping Sheet strips, interior of cabinets sealed with Loctite Power Grab, AI-1 interface with 1000VA A-L transformer
  • gce
    gce Posts: 2,158
    Check polarity with a AA battery to see if Polk actually wired it out of phase. Who knows, they are made by humans.

    I put my LSiM703's in my system and I had the same error. Dennis, how do you check it with a AA batt?
    Anaheim Hills CA,
    HT 5.1: Anthem MRX 720 / BDP-Denon DBT1713UD / Polkaudio LSiM703 / W4S mAmp's / Polkaudio LSiM706c / Polkaudio LSiM702F/X's / SVS PC12-NSD / Panasonic TC P55VT30

    2 Channel: Rogue RP-5 / WireWorld Electra power cord / Marantz TT-15S1/ Ortofon - Quintet Black MC / Marantz NA8005 DAC / W4S mAmp's / Synology DS 216+ll-4TB / Polkaudio LSiM703
  • Placing the + & - speaker wires on the + & - battery posts should yield the speakers moving outward when the wires are touched to the post. It is easy to see with the woofers as they move the most. All speakers should move in the same direction, if they don't, they have been wired wrong, or the post nuts have been switched.
    HT Optoma HD25 LV on 80" DIY Screen, Anthem MRX 300 Receiver, Pioneer Elite BDP 51FD Polk CS350LS, Polk SDA1C, Polk FX300, Polk RT55, Dual EBS Adire Shiva 320watt tuned to 17hz, ICs-DIY Twisted Prs, Speaker-Raymond Cable

    2 Channel Thorens TD 318 Grado ZF1, SACD/CD Marantz 8260, Soundstream/Krell DAC1, Audio Mirror PP1, Odyssey Stratos, ADS L-1290, ICs-DIY Twisted , Speaker-Raymond Cable
  • gce
    gce Posts: 2,158
    Thanks Dennis...I'll bet the tweeter is had to see. I'll check it out when I get home.
    Anaheim Hills CA,
    HT 5.1: Anthem MRX 720 / BDP-Denon DBT1713UD / Polkaudio LSiM703 / W4S mAmp's / Polkaudio LSiM706c / Polkaudio LSiM702F/X's / SVS PC12-NSD / Panasonic TC P55VT30

    2 Channel: Rogue RP-5 / WireWorld Electra power cord / Marantz TT-15S1/ Ortofon - Quintet Black MC / Marantz NA8005 DAC / W4S mAmp's / Synology DS 216+ll-4TB / Polkaudio LSiM703
  • gumbay13
    gumbay13 Posts: 360
    gce wrote: »
    Check polarity with a AA battery to see if Polk actually wired it out of phase. Who knows, they are made by humans.

    I put my LSiM703's in my system and I had the same error. Dennis, how do you check it with a AA batt?

    Interesting. I had the same error when i ran Audyssey on my 703s today.
    I just rechecked the speaker cable connections and once satisfied nothing was amiss, ignored the error and proceeded with the calibration

    I am beginning to wonder if i need to do some more investigation.

    AMP/Pre Pro: Outlaw 7000x, Marantz AV7703
    Speakers: Fronts:LSiM 705s/ Center: LSiM 706c / Surrounds: LSim 703s
    SUB: Rythmik LV12R x2
    Source:OPPO UDP-203
  • blehmbo
    blehmbo Posts: 179
    edited December 2014
    No need for alarm, the woofer in the LSiM703 is wired out of phase with the mid and tweeter by design. I can test my 706c later.
  • gce
    gce Posts: 2,158
    blehmbo wrote: »
    No need for alarm, the woofer in the LSiM703 is wired out of phase with the mid and tweeter by design. I can test my 706c later.

    Really, so this is by design? How did you find this out, by testing or did you read this somewhere?

    Anaheim Hills CA,
    HT 5.1: Anthem MRX 720 / BDP-Denon DBT1713UD / Polkaudio LSiM703 / W4S mAmp's / Polkaudio LSiM706c / Polkaudio LSiM702F/X's / SVS PC12-NSD / Panasonic TC P55VT30

    2 Channel: Rogue RP-5 / WireWorld Electra power cord / Marantz TT-15S1/ Ortofon - Quintet Black MC / Marantz NA8005 DAC / W4S mAmp's / Synology DS 216+ll-4TB / Polkaudio LSiM703
  • gumbay13
    gumbay13 Posts: 360
    So i ran Audyssey again.

    This time i had one lsim703 and one Rti A7 and again the LSim was the only speaker with the phase error. No errors on the A7
    I kept the A7 and swapped the other 703. Error still on the 703.

    Ran Audyssey on both A7s. No phase errors.

    Replaced them with the 703s, rechecked the cable connections and ran Audyssey and again the phase error.

    Previously i had just selected SKIP ERROR and moved on.
    This time just out of curiosity, I moved the positive connections to the negative terminals and vise versa (in contrast to the amplifier outputs) and this time no phase error!

    So it appears the "issue" is with the 703s.

    For what it is worth i have not noticed any difference in the sound IN or OUT of phase.
    May be I need to do a bit more critical listening.

    Also the last time i had a phase error, when doing Audyssey several months ago, the utility flagged the right rear surround speaker and lo and behold it was correct. I made the correct connection and all was well. I was impressed.
    So i am certain the receiver is not the issue here.


    AMP/Pre Pro: Outlaw 7000x, Marantz AV7703
    Speakers: Fronts:LSiM 705s/ Center: LSiM 706c / Surrounds: LSim 703s
    SUB: Rythmik LV12R x2
    Source:OPPO UDP-203
  • WLDock
    WLDock Posts: 3,073
    edited December 2014
    The 703 and 706 are 3-way designs with 4-way crossovers that have 18dB,18dB,12dB,6dB slopes. It would not be surprising if a driver is wired out of phase to bring things back in phase due to the crossovers.

    I've gotten this same error with my current RT3000 right speaker when I had a Pioneer SC unit. The speaker is closer to the wall and I did not have room treatments. It did not fail all the time depending on where I placed the mic. So, mine was more a reflective error.
    Post edited by WLDock on
    2.2 Office Setup | LG 29UB55 21:9 UltraWide | HP Probook 630 G8 | Dell Latitude | Cabasse Stream Amp 100 | Boston Acoustics VS 240 | AUDIORAX Desk Stands | Mirage Omni S8 sub1 | Mirage Omni S8 Sub2
  • blehmbo
    blehmbo Posts: 179
    edited December 2014
    gce wrote: »
    Really, so this is by design? How did you find this out, by testing or did you read this somewhere?

    I found this out (speaking for the 703) by testing and looking at the printing on the crossover board, the + of the woofer connects to the negative side of the crossover circuit.
  • gce
    gce Posts: 2,158
    edited December 2014
    Ok, So if I test the phase with the AA batt. on the lower posts the woofer should move IN and if I test using the top posts the tweeter and mid should move OUT...right?
    Anaheim Hills CA,
    HT 5.1: Anthem MRX 720 / BDP-Denon DBT1713UD / Polkaudio LSiM703 / W4S mAmp's / Polkaudio LSiM706c / Polkaudio LSiM702F/X's / SVS PC12-NSD / Panasonic TC P55VT30

    2 Channel: Rogue RP-5 / WireWorld Electra power cord / Marantz TT-15S1/ Ortofon - Quintet Black MC / Marantz NA8005 DAC / W4S mAmp's / Synology DS 216+ll-4TB / Polkaudio LSiM703
  • blehmbo
    blehmbo Posts: 179
    gce wrote: »
    Ok, So if I test the phase with the AA batt. on the lower posts the woofer should move IN and if I test using the top posts the tweeter and mid should move OUT...right?

    You shouldn't see the tweeter or mid move since they have capacitors in series which block DC, but the woofer should move inward with + to + and - to -.
  • Conradicles
    Conradicles Posts: 6,010
    blehmbo wrote: »
    No need for alarm, the woofer in the LSiM703 is wired out of phase with the mid and tweeter by design. I can test my 706c later.

    Why?
  • WLDock
    WLDock Posts: 3,073
    edited December 2014
    Because of phase shift at the crossover frequency. Sometimes you have to reverse the phase of a driver to help the flatten the combined acoustical output.
    2.2 Office Setup | LG 29UB55 21:9 UltraWide | HP Probook 630 G8 | Dell Latitude | Cabasse Stream Amp 100 | Boston Acoustics VS 240 | AUDIORAX Desk Stands | Mirage Omni S8 sub1 | Mirage Omni S8 Sub2
  • dpowell
    dpowell Posts: 3,050
    I found the same to be true when I switched the speaker connections to what would normally be "out of phase". MCACC did not find a phase issue in that configuration. I switched the wires back since I did not purposefully want to connect the speaker improperly and just moved on. Glad to hear I'm not the only one that has run into this. Surely Polk must have found this during quality testing and should have some insight or at least put our minds at ease that this is normal.
    ____________________________________________________________ polkaudio Fully Modded SDA SRS 1.2TLs + Dreadnaught, LSiM706c, 4 X Polk Surrounds + 4 X ATMOS SVS PB13 Ultra x 2Pass Labs X1, Marantz 7704, Sunfire Signature Cinema Grande 400, ADCOM 7807, Panasonic UB420, Sony SCD-C333ES, EPSON Pro Cinema 6050
  • I called tech support this morning & verified that this is intentional. Ken said it is due to a second order filter.
  • WLDock
    WLDock Posts: 3,073
    Due to phase shift. The driver is generally wired out of phase when using a 12dB/Oct crossover.

    6dB/Oct = 90 degrees
    12dB/Oct = 180 degrees
    18dB/Oct = 270 degrees
    24dB/Oct = 0 degrees
    2.2 Office Setup | LG 29UB55 21:9 UltraWide | HP Probook 630 G8 | Dell Latitude | Cabasse Stream Amp 100 | Boston Acoustics VS 240 | AUDIORAX Desk Stands | Mirage Omni S8 sub1 | Mirage Omni S8 Sub2
  • gce
    gce Posts: 2,158
    1Locoweed wrote: »
    I called tech support this morning & verified that this is intentional. Ken said it is due to a second order filter.

    Thanks for that. Its always good to hear it from the horses month.
    Anaheim Hills CA,
    HT 5.1: Anthem MRX 720 / BDP-Denon DBT1713UD / Polkaudio LSiM703 / W4S mAmp's / Polkaudio LSiM706c / Polkaudio LSiM702F/X's / SVS PC12-NSD / Panasonic TC P55VT30

    2 Channel: Rogue RP-5 / WireWorld Electra power cord / Marantz TT-15S1/ Ortofon - Quintet Black MC / Marantz NA8005 DAC / W4S mAmp's / Synology DS 216+ll-4TB / Polkaudio LSiM703
  • gce wrote: »
    blehmbo wrote: »
    No need for alarm, the woofer in the LSiM703 is wired out of phase with the mid and tweeter by design. I can test my 706c later.

    Really, so this is by design? How did you find this out, by testing or did you read this somewhere?

    So, in the end what did u do with the speaker wires? reverse it or use them as it's design? Kindly advise too, i got the same when connect them with my Yamaha TSR-7850 receiver and it found automatically :(

    Tks A Lot!
    mdacompact
  • ptrooper
    ptrooper Posts: 501
    I had the same reading with my old yammy Z 11 i sold a few years ago.
    The dealer said to not take notice as it was very common.
    Before being told this i pulled apart the 706 and all was ok!
  • Emlyn
    Emlyn Posts: 4,346
    I just think of the auto setup phase warning messages as a convenient reminder to double check the amp to speaker wiring with a new setup. Always out of phase, always wired correctly in my experiences.
  • mantis
    mantis Posts: 17,031
    Phase can also be measured in room according to the way that signal bounces around the room it can appear out of phase even if it's wire correctly and internally wired correctly.
    Dan
    My personal quest is to save to world of bad audio, one thread at a time.
  • mpitogo
    mpitogo Posts: 475
    Oh dang, this is very helpful. I was scratching my head as well when I swapped my LSiM series into my HT. It said all of my speakers where out of phase, 707, 706c and four 702fx, I will have to check all of the wiring again.
    • Living Room Music-2.0 Polk Legend L800 | McIntosh C70 | McIntosh MA5200 (Treble) | McIntosh MC452 (Bass) | Sublimeacoustic K231 Active xover | Denon DP-2500A | Denafrips Ares II | Belkin Soundform Connect | iPad Air USB to DAC
    • Media Room Ht-7.2.6/13.1 (Atmos/Auro-3D) Polk LSiM707, LSiM706c, LSiM702 F/X [x4], height LSiM703 [x6], HSU VTF-15H MK2 Dual | Marantz AV8805A | Rotel RB-1590 (L/R) | Appollon NC500 11ch | Sony UBP-X800 | AppleTV 4K | JVC RS2100
    • Game Room-5.1 Polk LSi25, LSiC, LSiF/X | Marantz SR7009 | AppleTV 4K | Xbox One S | Sony PS2, PS3 | Nintendo Wii | Gaming PC | Sony 75" LCD
    • Master Bedroom Music-2.0 Totem Hawk | Marantz PM-10 | Marantz SA-10 | SONY PS-HX500
    • Office-2.0 Ascend Acoustics Sierra LX, DSW microPRO3000 | Rotel RA-1570 | Marantz HD-CD1
    • Daughter's Bedroom 1-2.0 TBD Martin Logan Forte
    • Guest Room 2-2.0 Klipsch RP-600M | Martin Logan Forte
    • Guest Room 3-3.0 Martin Logan Motion 40, 50XT | Onkyo TX-SR705 | Apple TV | Samsung 55" TV
    • Guest Room 4-2.0 QAcoustics 3030i | Sansui AU-6900 | Topping DX7s | Sansui FR-1080 | TV
    • Maintenance: Pro-Ject VC-S Record Cleaning Machine
  • mrloren
    mrloren Posts: 2,454
    I had/have the same problem with my LSiM's. Audyssey said out of phase. I did some reading and googled it. Look's to be the norm with the LSiM's.

    When I had the Signatures I didn't get the phase error but Audyssey would put the sub out of phase. I'd get 5db more output from the sub switching the phase to 180. now with the LSiM's I run Audyssey get the speaker out of phase warning but the sub is in phase. Sounds great so I just leave it alone.
    When I was a kid my parents told me to turn it down. Now I'm an adult and my kids tell me to turn it down.
    Family Room:LG QNED80 75", Onkyo RZ50 Emotiva XPA3 GEN3 Oppo BDP-93,Sony UBP-X800BM. Main: Polk LsiM 705Center: Polk LSiM 704CFront High/Rear High In-Ceiling Polk 80F/X RT Surrounds: Polk S15 Sub: HSU VTF3-MK5
    Bed Room; Marantz SR5010, BDP-S270Main: Polk Signature S20Center: Polk Signature S35Rear: Polk R15 Sub: SVS SB2000
    Working Warehouse; Yamaha A-S301, Sony DVP-NS3100ES for disc Plok TSX550T SVS PB2000 Mini tower PC with 400GB of music
  • mpitogo
    mpitogo Posts: 475
    edited February 2020
    @mrloren good to know. Audyssey here too. I have both my subs at normal 0 phase, will have to test changing them. They can do 0, 90, 180 and 270.
    • Living Room Music-2.0 Polk Legend L800 | McIntosh C70 | McIntosh MA5200 (Treble) | McIntosh MC452 (Bass) | Sublimeacoustic K231 Active xover | Denon DP-2500A | Denafrips Ares II | Belkin Soundform Connect | iPad Air USB to DAC
    • Media Room Ht-7.2.6/13.1 (Atmos/Auro-3D) Polk LSiM707, LSiM706c, LSiM702 F/X [x4], height LSiM703 [x6], HSU VTF-15H MK2 Dual | Marantz AV8805A | Rotel RB-1590 (L/R) | Appollon NC500 11ch | Sony UBP-X800 | AppleTV 4K | JVC RS2100
    • Game Room-5.1 Polk LSi25, LSiC, LSiF/X | Marantz SR7009 | AppleTV 4K | Xbox One S | Sony PS2, PS3 | Nintendo Wii | Gaming PC | Sony 75" LCD
    • Master Bedroom Music-2.0 Totem Hawk | Marantz PM-10 | Marantz SA-10 | SONY PS-HX500
    • Office-2.0 Ascend Acoustics Sierra LX, DSW microPRO3000 | Rotel RA-1570 | Marantz HD-CD1
    • Daughter's Bedroom 1-2.0 TBD Martin Logan Forte
    • Guest Room 2-2.0 Klipsch RP-600M | Martin Logan Forte
    • Guest Room 3-3.0 Martin Logan Motion 40, 50XT | Onkyo TX-SR705 | Apple TV | Samsung 55" TV
    • Guest Room 4-2.0 QAcoustics 3030i | Sansui AU-6900 | Topping DX7s | Sansui FR-1080 | TV
    • Maintenance: Pro-Ject VC-S Record Cleaning Machine
  • dpowell
    dpowell Posts: 3,050
    mdacompact wrote: »
    gce wrote: »
    blehmbo wrote: »
    No need for alarm, the woofer in the LSiM703 is wired out of phase with the mid and tweeter by design. I can test my 706c later.

    Really, so this is by design? How did you find this out, by testing or did you read this somewhere?

    So, in the end what did u do with the speaker wires? reverse it or use them as it's design? Kindly advise too, i got the same when connect them with my Yamaha TSR-7850 receiver and it found automatically :(

    Tks A Lot!
    mdacompact

    I kept mine wired as designed. Been that way since I started the thread and i have no complaints. It sounds great!
    ____________________________________________________________ polkaudio Fully Modded SDA SRS 1.2TLs + Dreadnaught, LSiM706c, 4 X Polk Surrounds + 4 X ATMOS SVS PB13 Ultra x 2Pass Labs X1, Marantz 7704, Sunfire Signature Cinema Grande 400, ADCOM 7807, Panasonic UB420, Sony SCD-C333ES, EPSON Pro Cinema 6050
  • dpowell wrote: »
    mdacompact wrote: »
    gce wrote: »
    blehmbo wrote: »
    No need for alarm, the woofer in the LSiM703 is wired out of phase with the mid and tweeter by design. I can test my 706c later.

    Really, so this is by design? How did you find this out, by testing or did you read this somewhere?

    So, in the end what did u do with the speaker wires? reverse it or use them as it's design? Kindly advise too, i got the same when connect them with my Yamaha TSR-7850 receiver and it found automatically :(

    Tks A Lot!
    mdacompact

    I kept mine wired as designed. Been that way since I started the thread and i have no complaints. It sounds great!

    Tks you man! :smile:
  • pawelmwo
    pawelmwo Posts: 137
    Yeah normal. My 705 and 706c had phase errors during Audyssey calibration as well. Sound great.
  • mpitogo
    mpitogo Posts: 475
    Thank you op for starting this thread. It’s something you don’t read in a manual.

    OK so I put all of them back to proper polarity and needed to set my subs to 180, I had some serious loss of bass due to cancellation. I was wondering why my system went bass shy going from LSi25 -> LSiM707.

    • Living Room Music-2.0 Polk Legend L800 | McIntosh C70 | McIntosh MA5200 (Treble) | McIntosh MC452 (Bass) | Sublimeacoustic K231 Active xover | Denon DP-2500A | Denafrips Ares II | Belkin Soundform Connect | iPad Air USB to DAC
    • Media Room Ht-7.2.6/13.1 (Atmos/Auro-3D) Polk LSiM707, LSiM706c, LSiM702 F/X [x4], height LSiM703 [x6], HSU VTF-15H MK2 Dual | Marantz AV8805A | Rotel RB-1590 (L/R) | Appollon NC500 11ch | Sony UBP-X800 | AppleTV 4K | JVC RS2100
    • Game Room-5.1 Polk LSi25, LSiC, LSiF/X | Marantz SR7009 | AppleTV 4K | Xbox One S | Sony PS2, PS3 | Nintendo Wii | Gaming PC | Sony 75" LCD
    • Master Bedroom Music-2.0 Totem Hawk | Marantz PM-10 | Marantz SA-10 | SONY PS-HX500
    • Office-2.0 Ascend Acoustics Sierra LX, DSW microPRO3000 | Rotel RA-1570 | Marantz HD-CD1
    • Daughter's Bedroom 1-2.0 TBD Martin Logan Forte
    • Guest Room 2-2.0 Klipsch RP-600M | Martin Logan Forte
    • Guest Room 3-3.0 Martin Logan Motion 40, 50XT | Onkyo TX-SR705 | Apple TV | Samsung 55" TV
    • Guest Room 4-2.0 QAcoustics 3030i | Sansui AU-6900 | Topping DX7s | Sansui FR-1080 | TV
    • Maintenance: Pro-Ject VC-S Record Cleaning Machine