LFE different from DVD to Blu-Ray and vice versa? - AVS Forum
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post #1 of 8 Old 07-07-2013, 12:32 AM - Thread Starter
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I have a Denon 5800.

I am using an Oppo-93 and a Toshiba XA2.

Both are connected via Coax or TOSLINK for DVDs and analog outs for lossless.


I calibrated the receiver and DVDs have a lot more LFE than their blu-ray counterpart.

Is this normal?

Anyone else run into this issue on an older non-HDMI receiver?

My 5800 is waayyy to useful to retire, at least until Denon makes its replacement. (I wasn't in the market at the time to get a 5308).

Any info would be appreciated.

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post #2 of 8 Old 07-07-2013, 01:44 AM
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Yes, because of the difference in LFE handling between digital and analogue inputs, it's all explained here:

http://www.avsforum.com/t/748147/lfe-subwoofers-and-interconnects-explained

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post #3 of 8 Old 07-07-2013, 07:41 AM
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LFE is recorded 10dB low and must be boosted in the processor. (With digital, the software does the boost, with analog, the user had to do it.) Bass management is done in the player and when using bass management, the sub output is dropped another 5dB.

The challenge with MCH analog is finding a way to boost the sub without screwing up your digital calibration. Many Denons have a setting for an analog SW boost of 5, 10, or 15dB just for this purpose. That's what I use on a Denon 3805.

If you did not already know this - all speaker setups such as layout (5.1 or 7.1), distance, and bass management must be done in the player since those adjustments are all done in the digital domain prior to the DAC. Your receiver just acts like an amp.
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post #4 of 8 Old 07-07-2013, 10:34 AM - Thread Starter
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Quote:
Originally Posted by BIslander View Post


If you did not already know this - all speaker setups such as layout (5.1 or 7.1), distance, and bass management must be done in the player since those adjustments are all done in the digital domain prior to the DAC. Your receiver just acts like an amp.

You're referring to the analog out portion, correct? The Coax and Toslink fed through the receiver would be using the receivers calibration?

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post #5 of 8 Old 07-07-2013, 12:23 PM
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Yes. This is not a DVD vs. Blu-ray issue. It's a difference between digital and multichannel analog. With analog, all of the processing had to happen in the player prior to the digital- analog conversion.
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post #6 of 8 Old 07-07-2013, 07:10 PM - Thread Starter
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Ok, thanks, I'll crank up that portion...I know my HDDVD player has it, I'm guessing my OPPO does as well.

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post #7 of 8 Old 07-16-2013, 09:44 PM - Thread Starter
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Adjusted th LFE on my Oppo 93, everything sounds better now.

Unfortunately my XA2 only has sub yes/no, so my Hd DVD will b sub par.

Thanks for info!

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post #8 of 8 Old 07-16-2013, 10:04 PM
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Well, the LFE output should not be raised in the player. That should happen in the processor or at the sub itself. The reasons are explained in the link that Kilian.ca posted a few entries above this one. The challenge is finding a way to boost the sub for the MCH analog inputs without affecting digital sources. While a challenge, it can be done with most processors.
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