Sub Phase

I always wondered about the phase on subwoofer's. I've always left mine at 0 and never thought about it. For giggles this afternoon while listening to Peter Gabriel I got a wild hair and flipped it to 180. I wasn't expecting anything at all. I was more thinking it would screw up the sound. I flipped the switch and sat down, turned it back up to -15db and was a good God man where did all that bass come from.

My system sounded great before, I mean shake the house and rock all day. This is like I added a new sub. Bass is clean and non directional (before I could tell where the sub was). Deeper cleaner and a lot louder.

I spent an hour before the wife came home playing, setting different cross over points setting speaker from large to small and back an forth.

At phase 0, I would run Audyssey set to small and 80hz. anything else gave me a hallow sound unless I set to large. I had a slight localize of the sub

At phase 180, no difference going from large to small up and down the cross over till I hit 110hz then the sub started to localize.

So with a flick of a switch I went from great to insane,
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:
Samsung UN75RU710DFXZA,
Denon AVR-X4400H, Emotiva XPA3 GEN3
Oppo BDP-93,Sony UBP-X800BM, WD Live HUB.
Main: Polk LsiM 705
Center: Polk LSiM 704C
Front High/Rear High In-Ceiling Polk 80F/X RT
Surrounds: Polk S15
Sub: HSU VTF3-MK5

Bed Room;
Marantz SR5010, BDP-S270
Main: Polk Signature S20
Center: Polk Signature S35
Rear: Polk R15
Sub: HSU STF-2

Working Warehouse;
Sony 2100ES AVR, Sony DVP-NS3100ES for disc
Cerwin Vega AT-12 (blasters) Advent Prodigy (listening)
Old sony 12" Sub
Mini tower PC with 400GB of music

Comments

  • mhardy6647mhardy6647 Posts: 27,294
    Wave mechanics is interesting stuff.

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    FWIW -- It's nice(st) to have continuously variable phase, IMO.
  • mrlorenmrloren Posts: 2,349
    Got home from work and ran a DB meter test with my iPhone. Played Peter Gabriel sledge hammer

    Phase 0; Average 78.4 db, peak 84db

    Phase 180; Average 82.5 db peak 89.8db

    I left the volume at -20db for both runs

    All this time and it's just a flick of a switch.
    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:
    Samsung UN75RU710DFXZA,
    Denon AVR-X4400H, Emotiva XPA3 GEN3
    Oppo BDP-93,Sony UBP-X800BM, WD Live HUB.
    Main: Polk LsiM 705
    Center: Polk LSiM 704C
    Front High/Rear High In-Ceiling Polk 80F/X RT
    Surrounds: Polk S15
    Sub: HSU VTF3-MK5

    Bed Room;
    Marantz SR5010, BDP-S270
    Main: Polk Signature S20
    Center: Polk Signature S35
    Rear: Polk R15
    Sub: HSU STF-2

    Working Warehouse;
    Sony 2100ES AVR, Sony DVP-NS3100ES for disc
    Cerwin Vega AT-12 (blasters) Advent Prodigy (listening)
    Old sony 12" Sub
    Mini tower PC with 400GB of music
  • codycatalistcodycatalist Posts: 2,677
    Sound wave interaction is a funny thing right?! I utilize phase more in my car audio application due to such a small area and so many drivers but it can make a HUGE difference.
    Just a dude doing dude-ly things

    "Temptation is the manifestation of desire which equals necessity." - Mikey081057
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    "Audiophiles are the male equivalent of cat ladies." - Audiokarma Member
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