1. Time for some upgrades in server hardware and software to enhance security and take AK to the next level. Please contribute what you can to sales@audiokarma.org at PayPal.com - Thanks from the AK Team
    Dismiss Notice

Sub question

Discussion in 'Home Theater & Video' started by Jchooper2000, May 15, 2018.

  1. Jchooper2000

    Jchooper2000 New Member

    Messages:
    41
    Location:
    SW Michigan
    Nob alert.

    I've been into music all of my 62 years but way behind when it comes to home theater. I have a 9.2 Onkyo receiver driving my Lansing Altec Studio 19 speakers. I've been looking on CL for some used Klipsch or Definitive Tech subs or any other brands. So what if the speakers have a build in amp would I hook that up to my receiver and double my power or look for a sub that either doesn't have an amp or the ability to hook up bypassing the amp build into the sub? Thanks - Jim!!
     

     

    Please register to disable this ad.

  2. whoaru99

    whoaru99 Epic Member

    Messages:
    40,935
    Location:
    LoTL
    If the sub has a built-in amp then that is the amp that powers the sub's driver/woofer.

    Some subs with built-in amp have high level/speaker level inputs, but using those inputs does not use the receiver's power in any additive way. Only a very tiny amount of that input is passed to the sub's internal amp as signal, which then amplifies it to power the driver.

    More often though, for home theater, you'd use the low level LFE/sub outputs from the receiver into the low level input of the powered sub.
     
  3. Oerets

    Oerets AK Subscriber Subscriber

    Messages:
    10,538
    Location:
    Derby City U.S.A.
    A power sub is the way to go. Try and get one with both low level (both red white RCA over a single input) and hi level (speaker feed thru) inputs. Controls for cut off and phase along with volume are added plus!
    That way you can have sufficient bass without the need to crank the rest of the system if the need arises.

    Inexpensive nice subs are Infinities and DCM.

    Barney
     
  4. Jchooper2000

    Jchooper2000 New Member

    Messages:
    41
    Location:
    SW Michigan
    When I hear the term "Powered Sub" does that mean it has a built in amp or requires electricity? I'm thinking the former.

    PS I'm still rocking to my Marantz 2325 receiver I got in the mid 70s so getting into HT is new to me.
     
  5. whoaru99

    whoaru99 Epic Member

    Messages:
    40,935
    Location:
    LoTL
    Well, it's a reference to the former, in general.

    That said, if it has a built-in amp it also requires power, as in (typically) AC main connection in addition to the audio connection to your stereo/HT gear.
     
  6. imral3

    imral3 Super Member

    Messages:
    2,355
    Location:
    Blackwood, New Jersey
    You mention your newness to home theater... But, you also mentioned only a pair of stereo speakers. Are these your only speakers or do you have other speakers?
     

     

    Please register to disable this ad.

  7. Jchooper2000

    Jchooper2000 New Member

    Messages:
    41
    Location:
    SW Michigan
    At the moment all I have is the pair of Altecs. Hoping to add 2 subs and a center channel. Being retired I don't spend money like I used too.
     
  8. imral3

    imral3 Super Member

    Messages:
    2,355
    Location:
    Blackwood, New Jersey
    Are the Altecs lacking in bass output? I've never heared them play. But, they look pretty substantial. I hear ya on the money part... I'm in the same boat being permenantly disabled.
     
    Jchooper2000 likes this.
  9. Jchooper2000

    Jchooper2000 New Member

    Messages:
    41
    Location:
    SW Michigan
    The Altec rock ... I want to rock even harder.
     
    jami w. likes this.
  10. imral3

    imral3 Super Member

    Messages:
    2,355
    Location:
    Blackwood, New Jersey
    So, again... what are you after? A better stereo experience? Or, a HT experience? Not always advised to mix the two.
     
  11. JoeESP9

    JoeESP9 ESL's & tubes since 83

    Messages:
    16,522
    Location:
    Philadelphia PA
    IMO it really depends on where you start. If you start with a good two channel system and add surround/HT capability you only need turn of the HT gear and your two channel system is it. This way there is no mixing of anything.
     

     

    Please register to disable this ad.

  12. Jchooper2000

    Jchooper2000 New Member

    Messages:
    41
    Location:
    SW Michigan
    I'm hoping for the best of both worlds. Listening to music at times and at other times HT.
     
  13. imral3

    imral3 Super Member

    Messages:
    2,355
    Location:
    Blackwood, New Jersey
    My concern was with what he is starting with it will be difficult to tonally match the other speakers to the giant Altecs. If the OP's primary concern is music listening, and is far less concerned about the possible mismatch of sound for video, then he does have a great starting point.
     
  14. Jchooper2000

    Jchooper2000 New Member

    Messages:
    41
    Location:
    SW Michigan
    Thanks guys!!
     
    imral3 likes this.
  15. Guest126

    Guest126 Well-Known Member

    Messages:
    535
    A powered sub is a good solution, preferably with a line in connection.
     
    Bill Ferris likes this.
  16. Putterman

    Putterman Super Member

    Messages:
    1,321
    The biggest issue I would have with adding sub(s) is that they're going to have to be large (and expensive), 12 inch woofers and up to add to the lowest frequencies i.e. below 30 hz.
    What a sub can do is free up the Altecs from having to reproduce the lowest frequencies so they have less distortion or add bass if you're after room shaking. :banana:
     

     

    Please register to disable this ad.

  17. Grenadeslio

    Grenadeslio Super Member

    Messages:
    2,572
    Try Parts Express, the 12" Sub 1200 @ $148 is cheap enough to add two, rated to 25hz.
     
    BrianKBaur likes this.
  18. donprice

    donprice Wound up workin' at a gas station.... Subscriber

    Messages:
    2,383
    I think you are going to need a rather large sub or two to keep up the Altec Model 19. Like something loaded with an 18" driver though a pair of 15" can do the trick. Got any interest in DIY? Very large high outputs subs are the sweet-spot for DIY. In this case you may be better off running an external pro-audio amp rather than an internal plate amp, particularly if you are running a pair of subs.
     
    Grenadeslio likes this.
  19. Jchooper2000

    Jchooper2000 New Member

    Messages:
    41
    Location:
    SW Michigan
    I'm looking to rattle my windows and PO my neighbors. I have 12" sub in my wakeboard board which works great at stunning the fish :rockon:

    I'm jack of most trades and master of none ... so I don't know about making my own.
     
    jami w. likes this.
  20. nedseg

    nedseg AK Subscriber Subscriber

    Messages:
    494
    Location:
    Wisconsin

Share This Page