LFE or Line in?

Which way should I connect my subwoofer for best performance? Is there a difference?

Have a 5.1 setup with a Marantz AVR.

Thanks!
AVR: Marantz SR 5011
L/ R: Polk Audio 703 LSiM (Bi Amp'd)
C: Polk Audio 255c - LS
R: Def Tech
Sub: PSW 505 (12 inch)
DVD: Oppo UDP 203
TV: 2016 Sony XBR 75X850D

Comments

  • F1nutF1nut Posts: 40,627
    LFE
    Political Correctness'.........defined

    "A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a t-u-r-d by the clean end."


  • Yeahp.
    Oh, Listen here mister. We got no way of understandin' this world. But we got as much sense of this bird flyin in the sky. Now there is a lot that bird don't know, but it don't change the fact that the world is happening to him all the same. What I am tryin to say is, is that the course of your life, well its changing, and you don't even see it- Forest Bondurant
  • rooftop59rooftop59 Posts: 4,753
    I can’t see your setup in the mobile layout, but normally the difference is that the LFE is a direct, unfiltered input that bypasses crossover and sometimes even volume. Line in will be filtered by crossover, phase, and volume. Since the avr is going to do all these functions, LFE is recommended.
    HT Rig:
    Denon AVR-X4200w; Peachtree Audio Nova Integrated; Bryson BPD-1; Mains: Dynaudio Emit 10 + MartinLogan Dynamo (original) sub; Center - Polk cs400i; Heights, Center Surround - Klipsch KHC - 6 In-Ceiling; Surrounds - Monoprice in-ceiling; Sub - SVS PB10-ISD; LG UP870 4K BDP

    Master Bedroom
    Marantz SR-5007; Peachtree Audio NovaPre; Audiosource Amp Two, PSB Imagine B, Boston VR-10 center, NHT Super One CI surrounds, ACI Titan subwoofer, Squeezebox Touch
  • GlennDogGlennDog Posts: 1,594
    Is LFE recommended when your rig pulls double duty? (HT and 2 channel)
    Presently connected to Line In

    In my rig, I don't use the Pre/Pro unless I'm watching movies.
    I use a dedicated pre with HT pass-thru when listening to 2.1

    TIA . . . no hi-jacked thread intended!!
    Power Rogue M180 monos & Adcom GFA 5802
    PS Audio PerfectWave Power Plant 10
    Rears Definitive Technology BP-2
    DAC North Star Design Supremo
    Source PSA PWT & Oppo 105
    Pre/Pro Integra DHC 40.1
    LCD Samsung LN46B750
    Mains Salk HT2-TL
    Pre Cary SLP-98 F1
    Center Salk HT2C
    Wires MIT S3.3
    PSA PC AC-12
  • rooftop59rooftop59 Posts: 4,753
    Well, both my rigs are dual purpose and I end up using some strange configurations to get it right. In the bedroom where I have a two channel preamp that is only on for music and a HT receiver for everything else, I actually use both inputs. The preamp goes to the line in, the AVR goes to the LFE. So you might want to try that, but it depends on a number of other factors, such as are your speakers set to run full range?
    HT Rig:
    Denon AVR-X4200w; Peachtree Audio Nova Integrated; Bryson BPD-1; Mains: Dynaudio Emit 10 + MartinLogan Dynamo (original) sub; Center - Polk cs400i; Heights, Center Surround - Klipsch KHC - 6 In-Ceiling; Surrounds - Monoprice in-ceiling; Sub - SVS PB10-ISD; LG UP870 4K BDP

    Master Bedroom
    Marantz SR-5007; Peachtree Audio NovaPre; Audiosource Amp Two, PSB Imagine B, Boston VR-10 center, NHT Super One CI surrounds, ACI Titan subwoofer, Squeezebox Touch
  • jeremymarcinkojeremymarcinko Posts: 3,259
    edited September 16
    LFE is also a discrete channel in movie mixes. If you go left/right line in your missing some of the soundtrack. Without LFE you only get the front channels mix. If you go LFE and select “double bass” the the subs get the front L/R and the LFE mix.

    Okay that might be confusing. The subwoofer out of an AVR or HT processor will be the LFE channel and can have L/R mixed in with “double bass.”

    The subwoofer out of a preamp or two channel integrated/receiver would just be the L/R obviously and still would go to the LFE input. Only if you don’t have a dedicated subwoofer out should you use the L/R input.
    Oh, Listen here mister. We got no way of understandin' this world. But we got as much sense of this bird flyin in the sky. Now there is a lot that bird don't know, but it don't change the fact that the world is happening to him all the same. What I am tryin to say is, is that the course of your life, well its changing, and you don't even see it- Forest Bondurant
  • Thanks everyone. I actually had the LFE in use.

    Does that mean all the buttons on the back of the sub don’t work? The Marantz is in control?
    AVR: Marantz SR 5011
    L/ R: Polk Audio 703 LSiM (Bi Amp'd)
    C: Polk Audio 255c - LS
    R: Def Tech
    Sub: PSW 505 (12 inch)
    DVD: Oppo UDP 203
    TV: 2016 Sony XBR 75X850D
  • mlistens03mlistens03 Posts: 2,327
    Not necessarily... in my Polk LSi subs, the LFE disables the internal crossover and possibly the phase switch (not sure on the last one), but the volume still functions.
    Micah

    Main system: Technics SL3200, Shure M97xE, Lafayette LR1100 for tuner, Hagerman Audio Labs Bugle 2 phono stage, NAD C352 integrated, Boston Acoustics VR 2, Boston PV500, generic ICs, and BJC Belden speaker cables.

    Desktop: Dell Precision 690 running iTunes, Yamaha RX-v665, Monitor Audio R90s, Velodyne VA-907, generic ICs and speaker cables.
    I've always thought the goal of high-end audio was not to have your neighbors bang on the wall and say, 'Turn that darn music down' but to have your neighbors bang on the wall and say, 'Tell your friends to go home and you can practice later this week'.
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