question for mac

KineticKinetic Posts: 437
edited January 2008 in Car Subwoofer Talk
apparently the mono Amp should be here by next week, it takes too long for the holidays and those things, and the enclosure is already done, so i would have my sub playing in a few days.

anyway you told me before to take out the rear speakers, for a better SQ
but i want to know why does the rear speakers affect my SQ.

and if i take them off, am i going to have more bass on the cabin?
since the subwoofer its in the trunk, and without the rear speakers, i would have a conecction between the trunk and the rear speakers?

or its a bad idea?

thanks Mac
Z
/////Alpine CDA-9887 HU
/////Alpine KTX-1000EQ
/////Alpine PDX-4.150
/////Alpine PDX-1.1000
Polk Audio SR 6500
Polk Audio SR 124 DVC
KnuKonceptz MKS Kable

G35
/////Alpine CDA-9887 HU
/////Alpine KTX-1000EQ
/////Alpine PDX-4.150
/////Alpine PDX-1.1000
/////Alpine SPX 17PRO
/////Alpine SWX 1243D
KnuKonceptz MKS Kable
Post edited by Kinetic on

Comments

  • eloplayspoloeloplayspolo Posts: 1,117
    edited January 2008
    the reason for only front speakers is sound stage.
    2013 Toyota Prius
    Audible Physics 3 Way: H6MB, AR3-A, AR2.0
    Image Dynamics iDMax 12" D2v4
    (2) Alpine PDX-V9 Bridged, Alpine PDX-M12 (500w Mid-Bass, 200w Mid, 200w Tweet, 1200w Sub)
    Mosconi 6to8 v8
  • TopperTopper Posts: 403
    edited January 2008
    i got more bass when i removed my rear speakers :)
  • GLN305GLN305 Posts: 96
    edited January 2008
    Kinetic wrote: »
    apparently the mono Amp should be here by next week, it takes too long for the holidays and those things, and the enclosure is already done, so i would have my sub playing in a few days.

    anyway you told me before to take out the rear speakers, for a better SQ
    but i want to know why does the rear speakers affect my SQ.

    and if i take them off, am i going to have more bass on the cabin?
    since the subwoofer its in the trunk, and without the rear speakers, i would have a conecction between the trunk and the rear speakers?

    or its a bad idea?

    thanks Mac
    Most SQ people don't like rear speakers because it changes the staging of the whole system. If you don't know what staging is, it's basically recreating instrument placement, speaker placement and ambience of the original performance or recording. Rear speakers detract from that except in the case of some SQ competitors. Now, keep in mind that if you aren't interested in creating a great soundstage, then rear speakers can sound good. You just have to follow the same guidelines as for front speakers...good quality, clean power and careful tuning. Quite a few people do see a gain in bass if they have subwoofers in the trunk since removing the rear speakers allows for more sound to pass from a well sealed trunk into the passenger compartment.

    EDIT: I just noticed where you mentioned a concern about an connection between the rear speakers and subwoofer in the trunk. I have heard of subwoofers creating enough pressure to interfere with the rear speakers if the rear speakers and in the rear deck and the subwoofers are in the trunk.
  • KineticKinetic Posts: 437
    edited January 2008
    woow

    thanks guys, i will try them in a few days.

    and if i take out the rear speakers i can bridge my amp to a 100 RMS per channel, and put the gain in a quart, so 100 RMS per channel and no distortion.

    thanks for the advices
    Z
    /////Alpine CDA-9887 HU
    /////Alpine KTX-1000EQ
    /////Alpine PDX-4.150
    /////Alpine PDX-1.1000
    Polk Audio SR 6500
    Polk Audio SR 124 DVC
    KnuKonceptz MKS Kable

    G35
    /////Alpine CDA-9887 HU
    /////Alpine KTX-1000EQ
    /////Alpine PDX-4.150
    /////Alpine PDX-1.1000
    /////Alpine SPX 17PRO
    /////Alpine SWX 1243D
    KnuKonceptz MKS Kable
  • KineticKinetic Posts: 437
    edited January 2008
    also what if i put the four speakers in the front?

    two on the regular place, and two on the kick panels?
    Z
    /////Alpine CDA-9887 HU
    /////Alpine KTX-1000EQ
    /////Alpine PDX-4.150
    /////Alpine PDX-1.1000
    Polk Audio SR 6500
    Polk Audio SR 124 DVC
    KnuKonceptz MKS Kable

    G35
    /////Alpine CDA-9887 HU
    /////Alpine KTX-1000EQ
    /////Alpine PDX-4.150
    /////Alpine PDX-1.1000
    /////Alpine SPX 17PRO
    /////Alpine SWX 1243D
    KnuKonceptz MKS Kable
  • KineticKinetic Posts: 437
    edited January 2008
    Topper wrote: »
    i got more bass when i removed my rear speakers :)

    how much more bass?

    like a 30%? or less?
    Z
    /////Alpine CDA-9887 HU
    /////Alpine KTX-1000EQ
    /////Alpine PDX-4.150
    /////Alpine PDX-1.1000
    Polk Audio SR 6500
    Polk Audio SR 124 DVC
    KnuKonceptz MKS Kable

    G35
    /////Alpine CDA-9887 HU
    /////Alpine KTX-1000EQ
    /////Alpine PDX-4.150
    /////Alpine PDX-1.1000
    /////Alpine SPX 17PRO
    /////Alpine SWX 1243D
    KnuKonceptz MKS Kable
  • eloplayspoloeloplayspolo Posts: 1,117
    edited January 2008
    just get another sub if u want more bass...
    2013 Toyota Prius
    Audible Physics 3 Way: H6MB, AR3-A, AR2.0
    Image Dynamics iDMax 12" D2v4
    (2) Alpine PDX-V9 Bridged, Alpine PDX-M12 (500w Mid-Bass, 200w Mid, 200w Tweet, 1200w Sub)
    Mosconi 6to8 v8
  • MacLeodMacLeod Posts: 14,365
    edited January 2008
    Kinetic wrote: »
    anyway you told me before to take out the rear speakers, for a better SQ but i want to know why does the rear speakers affect my SQ.

    2 things, imaging and cancellation.

    Having rear speakers will pull the soundstage to the rear when it should be right in front of you and nice and high. Also, having the rear speakers playing the same frequencies as your front speakers but hitting your ears at different times can and usually does cause cancellation not only in your ears but it also can cause cancellation in the low end response when they cancel each other out.
    and if i take them off, am i going to have more bass on the cabin?
    since the subwoofer its in the trunk, and without the rear speakers, i would have a conecction between the trunk and the rear speakers?

    or its a bad idea?

    thanks Mac

    That wouldnt really make much of a difference.
    also what if i put the four speakers in the front?

    two on the regular place, and two on the kick panels?

    Bad idea for the same reason as rear speakers. You dont want too many speakers playing the same frequencies.
    polkaudio sound quality competitor since 2005
    MECA SQ Rookie of the Year 06 ~ MECA State Champ 06,07,08,11 ~ MECA World Finals 2nd place 06,07,08,09
    08 Car Audio Nationals 1st ~ 07 N Georgia Nationals 1st ~ 06 Carl Casper Nationals 1st ~ USACi 05 Southeast AutumnFest 1st

    polkaudio SR6500 --- polkaudio MM1040 x2 -- Pioneer P99 -- Rockford Fosgate P1000X5D
  • KineticKinetic Posts: 437
    edited January 2008
    MacLeod wrote: »
    2 things, imaging and cancellation.

    Having rear speakers will pull the soundstage to the rear when it should be right in front of you and nice and high. Also, having the rear speakers playing the same frequencies as your front speakers but hitting your ears at different times can and usually does cause cancellation not only in your ears but it also can cause cancellation in the low end response when they cancel each other out.



    That wouldnt really make much of a difference.



    Bad idea for the same reason as rear speakers. You dont want too many speakers playing the same frequencies.


    thanks a lot mac.

    i already bridge my Amp in to 2 channels, and take out the rear speakers, im just waiting to install the mono amp.

    and the crossover is already on 100hz for the front speakers, and i will put the sub from 30 to 100hz
    Z
    /////Alpine CDA-9887 HU
    /////Alpine KTX-1000EQ
    /////Alpine PDX-4.150
    /////Alpine PDX-1.1000
    Polk Audio SR 6500
    Polk Audio SR 124 DVC
    KnuKonceptz MKS Kable

    G35
    /////Alpine CDA-9887 HU
    /////Alpine KTX-1000EQ
    /////Alpine PDX-4.150
    /////Alpine PDX-1.1000
    /////Alpine SPX 17PRO
    /////Alpine SWX 1243D
    KnuKonceptz MKS Kable
  • MacLeodMacLeod Posts: 14,365
    edited January 2008
    30-100? Thats kinda weird.

    30 is way too high to be cutting off for the sub. There is a lot of information and "feel" in the 30 and below range. And 100 is way too high. Thatll be way too boomy and pull to the rear a ton.

    Id let the sub roll off on the bottom end naturally and I wouldnt take the low pass any higher than 80.
    polkaudio sound quality competitor since 2005
    MECA SQ Rookie of the Year 06 ~ MECA State Champ 06,07,08,11 ~ MECA World Finals 2nd place 06,07,08,09
    08 Car Audio Nationals 1st ~ 07 N Georgia Nationals 1st ~ 06 Carl Casper Nationals 1st ~ USACi 05 Southeast AutumnFest 1st

    polkaudio SR6500 --- polkaudio MM1040 x2 -- Pioneer P99 -- Rockford Fosgate P1000X5D
  • KineticKinetic Posts: 437
    edited January 2008
    so 20 to 80hz

    and thanks again for the advices
    Z
    /////Alpine CDA-9887 HU
    /////Alpine KTX-1000EQ
    /////Alpine PDX-4.150
    /////Alpine PDX-1.1000
    Polk Audio SR 6500
    Polk Audio SR 124 DVC
    KnuKonceptz MKS Kable

    G35
    /////Alpine CDA-9887 HU
    /////Alpine KTX-1000EQ
    /////Alpine PDX-4.150
    /////Alpine PDX-1.1000
    /////Alpine SPX 17PRO
    /////Alpine SWX 1243D
    KnuKonceptz MKS Kable
  • MacLeodMacLeod Posts: 14,365
    edited January 2008
    Actually I wouldnt cut off the subs low end at all. Let it roll off naturally. And dont be afraid to tune around with the thing. 80 may be too high for you. Itll depend on what music you like and what sounds good to you. For instance, mine is set at 63.
    polkaudio sound quality competitor since 2005
    MECA SQ Rookie of the Year 06 ~ MECA State Champ 06,07,08,11 ~ MECA World Finals 2nd place 06,07,08,09
    08 Car Audio Nationals 1st ~ 07 N Georgia Nationals 1st ~ 06 Carl Casper Nationals 1st ~ USACi 05 Southeast AutumnFest 1st

    polkaudio SR6500 --- polkaudio MM1040 x2 -- Pioneer P99 -- Rockford Fosgate P1000X5D
  • KineticKinetic Posts: 437
    edited January 2008
    ok that should be a nice task for me

    i will try 60, 70, and 80hz.

    thanks again for your knoledge, and for all the comments guys

    i certanly learn a lot here
    Z
    /////Alpine CDA-9887 HU
    /////Alpine KTX-1000EQ
    /////Alpine PDX-4.150
    /////Alpine PDX-1.1000
    Polk Audio SR 6500
    Polk Audio SR 124 DVC
    KnuKonceptz MKS Kable

    G35
    /////Alpine CDA-9887 HU
    /////Alpine KTX-1000EQ
    /////Alpine PDX-4.150
    /////Alpine PDX-1.1000
    /////Alpine SPX 17PRO
    /////Alpine SWX 1243D
    KnuKonceptz MKS Kable
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