Infinity IL60 crossover

Discussion in 'Archived Threads 2001-2004' started by DanielQuinn, Apr 25, 2002.

  1. DanielQuinn

    DanielQuinn Auditioning

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    I have infinity IL60s (with internal 500 watt powered 12” sub-woofer -3db @ 28Hz) as my front speakers. I currently do not have a separate sub-woofer.

    My receiver is a Yamaha 795a.

    Infinity’s recommended setup:

    1. Set the IL60s as small

    2. Route the receiver’s LFE channel to the line input for the IL60s’ subs.

    3. Set the IL60s’ subs inputs to line vs. speaker.

    4. Turn off the high pass filter.

    The IL60s crossover to the sub is at 150Hz.

    The Yamaha’s crossover is at 80Hz.

    What is handling the range in between 80Hz and 150Hz?

    I understand that crossovers are gradual, but the LFE is going to output 80Hz and lower right?

    The Mid bass speaker in the IL60 will start fading out below 150hz, but nothing will take over until 80Hz.

    I am sure I am missing something. Can anyone explain this to me?

    Right now I have the IL60s as large, and route the receiver’s left and right pre-amp out to the appropriate IL60 sub’s line in. This way I will get bass from my DVD-A. Since I don’t have a separate sub it seems like the way to go. I will eventually add a dedicated sub for movies. I still want to leave my current setup as is so I don’t loose bass on DVD-As.

    By the way, The IL36 center channel is in the mail, and I intend to purchase Infinity IL40s for the surrounds. I am considering a Paradigm reference servo-15, but that may be in the distant future.

    Any comments on the IL40s and the reference servo-15 would be appreciated as well.
     
  2. CoreyH

    CoreyH Stunt Coordinator

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    Daniel,

    I just got the IL40's to use as my mains to go with my Il36 center, and my SVS 20-39 cs+ sub. The Il40's sound fantastic, I can't recommend them enough.

    C
     
  3. JohnnyG

    JohnnyG Screenwriter

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    With the IL60's high-pass filter off, they won't crossover at all, leaving that job up to your receiver. The way you have it wired now, you are sending the full frequency range to your subs which is not good.

    The IL36c will knock your socks off! I get near-perfect voice matching with the IL60's - something I've not experience before in my home. You're honestly hard pressed to tell whether the receiver is in stereo or Dolby 3 mode when listening to CDs.

    Make sure you get the R.A.B.O.S. kit too. It works wonders.
     
  4. DanielQuinn

    DanielQuinn Auditioning

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    I have the high pass filter on. What does that have to do with crossover? I thought that just filtered out frequencies too high for the sub.
     
  5. Steve Alan

    Steve Alan Agent

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    Daniel,

    Sounds like you have it hooked up right. If you have the left and right pre-amp outs hooked up to the Infinity subs, you should have the crossover switched on. The sub will take everything below 150hz, and block everything else. Since you don't have a stand alone sub, your receiver should be set to "no" on the speaker menu for subwoofer so that the LFE is split between your left and right speakers. The 80hz crossover is only in effect if you are using the subwoofer pre out on the receiver. The way you have it the speakers aren't missing anything, the pre-outs for each channel send out a full range signal as long as you have that speakers set for "large".
     
  6. JohnnyG

    JohnnyG Screenwriter

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    I'm going to check all this out with Infinity. What we really need to know here is if the Low-Pass switch is really a low-pass filter or whether it cancels the 150Hz crossover frequency in both directions.
     
  7. Jim Brantner

    Jim Brantner Auditioning

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    Daniel,

    I would appreciate if you would let me know how you're

    set-up works out. I just purchased IL60's,IL40's,IL36,

    IL25,and IL120 along with a Denon 3802. I'm not up and

    running yet as I'm waiting for the remodeling of the

    room there going in to get finished.

    THANKS JIM
     
  8. DanielQuinn

    DanielQuinn Auditioning

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    Here is the response from Infinity. It didn't help me, so if anyone has a better answer I would appreciate it.

    Hi Daniel,

    The frequencies normally roll off gradually from the crossover

    frequency, like you said. However 80Hz-150Hz in kind of a large gap. It is

    hard to tell how much it will effect the bass response in your room. Most

    rooms have a peak in response around the 100Hz range. Can you adjust the

    crossover frequency on the Yamaha receiver?? I would suggest keeping the

    IL60 sub sections

    connected to the Sub output even once you add the additional sub. You might

    have to split the output but that is still the recommended connection setup.

    I hope this helps.

    Regards,

    xxx xxxxxxx

    Customer Support Specialist
     
  9. DanielQuinn

    DanielQuinn Auditioning

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    Jim,

    I am very happy with the setup. I haven't gotten the Surrounds yet, and the RABOS kit has not arrived yet, but music sounds great, and the IL36 is perfect for the IL60s. Hurry up that remodling job and enjoy! I have to wait for my house to be built before I buy the surrounds or my 3 year old and 14 month old will surely destroy them. There is no room in the appartment for surrounds and kids, and my wife won't let me put the kids in storage.

    -Dan
     
  10. JohnnyG

    JohnnyG Screenwriter

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    Infinity says that when the Low Pass filter switch is OFF, the sub operates completely independantly from the rest of the speaker. The 150Hz crossover point is BYPASSED, so the 6.5" woofer will get everything from 0Hz up to the next crossover point for the midrange and the sub will be neither high-pass nor low-pass filtered.

    You can think of it as having a regular full-range tower speaker and a sub in the same cabinet.
     
  11. DanielQuinn

    DanielQuinn Auditioning

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    Thanks John,

    I couldn't get a good answer out of Infinity customer support. It still seems to me that you would be better off using the speaker's natural crossover to the sub at 150Hz or they would have set that crossover at 80Hz. I think I'll keep my setup as is for now, but it is good to know why the recommended setup works.
     

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