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  1. #1
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    Adding a sub to the "T2 straight to amps" chain

    Hello,

    I am hoping to get some clarification here. I talked to a customer service rep at SVS, and he suggested that I run RCA out from the T2 to the SVS PB12-NSD powered subwoofer, and XLR out from the T2 to the Odyssey Kismets amps. Their XLR inputs are not true balanced, if that matters.

    Does this approach sound right? If so, what considerations do I need to keep in mind when ordering cables?

    If this is not the way to go, any suggestions from Peter or anyone who has a similar setup would be appreciated.

  2. #2
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    Re: Adding a sub to the "T2 straight to amps" chain

    Generally, the easiest way to use a subwoofer with Lumin is to use the high level input of subwoofer. (I use the high level input of REL subwoofer.)

    If the subwoofer does not have a high level input, then the proposed connection in post #1 also works for Lumin T3 T2 P1MINI D3 D2 D1, if it does not cause a ground loop.
    Peter Lie
    LUMIN Firmware Lead

  3. #3
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    Re: Adding a sub to the "T2 straight to amps" chain

    Quote Originally Posted by wklie View Post
    Generally, the easiest way to use a subwoofer with Lumin is to use the high level input of subwoofer. (I use the high level input of REL subwoofer.)

    If the subwoofer does not have a high level input, then the proposed connection in post #1 also works for Lumin T3 T2 P1MINI D3 D2 D1, if it does not cause a ground loop.
    Peter, I appreciate this. All I have on this sub is low level input. So just to be sure - I would be good running RCA out from the T2 to the sub low level input and XLR out from the T2 to the amps, right?

    Not to complicate matters, but I just noticed this on the SVS website regarding the two RCA outputs on my sub's amp:

    There are two sets of output connectors on the STA-400D. One set (labeled Line Out) is unfiltered and carries the same signal as found on the input connectors. The set labeled High Pass Out has a high pass filter applied which has a corner frequency of 80Hz and a slope of -12 dB per octave.
    The output connectors are typically used to either daisy-chain additional subwoofers with a single, unfiltered output, or as the input to a power amplifier for the Left and Right main channels with no filtering or the 80Hz High Pass applied depending on which set of connectors are used.


    Would running the T2 out to the sub's low level input, and then one of the above mentioned outputs to the amps possibly be a preferable set-up?

    Thanks from someone who is ignorant and scared stiff of electricity!

    Thanks in advance!

  4. #4
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    Re: Adding a sub to the "T2 straight to amps" chain

    Post #3 connection: I guess this (high pass filtering) is the general logical way of doing bass management especially in AV receivers.

    Post #1 connection: I prefer this as I happen to subscribe to REL philosophy of no high pass filter:
    What is a High Pass Filter? | REL Acoustics

    I read a little objective discussions of this subject. Both schools have valid arguments. Regardless of theory, I am quite sure to find the definitive answer in your setup and room for your music and taste, you'll need to experiment with both connection setups to see which is better. If you need to compare between T2 XLR output vs RCA output, keep in mind that Lumin volume needs to be decreased by 12 steps in XLR to achieve similar output level in RCA.

    If this sounds too much trouble, please stick to post #1 connection, i.e. "running RCA out from the T2 to the sub low level input and XLR out from the T2 to the amps".
    Peter Lie
    LUMIN Firmware Lead

  5. #5
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    Re: Adding a sub to the "T2 straight to amps" chain

    Peter,

    As always, I appreciate your help! I might try a pair of inexpensive XLR's for the experiment before investing in higher-tier cables.

    Again, thank you.

  6. #6
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    Re: Adding a sub to the "T2 straight to amps" chain

    I found a pair of Hero XLR's in my cable tote, and so far it is good to have the subwoofer back in the chain. But the overall sound has changed a bit from what I remember when the preamp and sub were both in service. Maybe the tube preamp colored the sound somewhat, maybe the XLR's aren't broken in (I can't even remember when I used them...), who knows?

    One thing I do notice with the preamp out of the system is that the Leedh volume control does a very impressive job when it comes to listening at lower volume levels. It is hard to describe, but it seems (to me) that the top and bottom don't get compromised as much when turning the volume down, resulting in an overall more enjoyable experience. This was highlighted when I was trying to find the natural volume level of the water movement in the track "Buoyant" from Anne Lockwood's "Ground of Being" album.

    I can't explain technically exactly how this is accomplished, but my ears like what they're hearing.

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Adding a sub to the "T2 straight to amps" chain

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