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#169010 - 05/29/07 12:28 AM Re: Graph testing again, I'm confused, so is mojo :) [Re: ihifi]
grunt Offline
connoisseur

Registered: 12/04/06
Posts: 3569
Loc: Nirvana
Quote:


I think JohnK just restated what I had tried to mention earlier. But it seems like the culprit was the Direct mode, which defeated settings like the cross over, individual channel volume, etc.





On page 25 of my Denon 2807 manual it says to use Direct/Stereo mode “If there is no need for tone control or distribution of the low frequencies in function of the speaker configuration select the DIRECT mode to achieve the best sound quality.” So it sounds like at lest the 2807 is doing this.
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3M80 2M22 6QS8 2M2 1EP500 Sony BDP-S590 Panny-7000 Onkyo-3007 Carada-134 Xbox Buttkicker AS-EQ1

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#169011 - 05/29/07 12:36 AM Re: Graph testing again, I'm confused, so is mojo :) [Re: ihifi]
dllewel Offline
connoisseur

Registered: 06/20/05
Posts: 1189
Loc: Utah, USA
Yes, on many receivers direct mode is just that- it disables ALL digital processing (there by making the bass management adjustments not possible). This is why most SACD/DVD-Audio/Blu-ray/HD-DVD players that have multichannel analog outs have settings in them for bass management at the player level.

You could try playing the Realtraps CD in your DVD player connected by a solitary digital cable path. This should ensure your bass management settings will be in effect.
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M80s VP150 QS8s EP500s
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#169012 - 05/29/07 12:39 AM Re: Graph testing again, I'm confused, so is mojo :) [Re: JohnK]
Mojo Offline
connoisseur

Registered: 01/21/07
Posts: 3292
I agree there may be harmonic distortion of the 10Hz notes but these harmonic components would be very low amplitude. The mids are crossed at 160 Hz. That's the 16th harmonic! Something else is going on.

As for evil spirits, Randy and I are separated by 2,700km and I had Father Karras exorcise my basement shortly after it was built. So no evil spirits here .

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#169013 - 05/29/07 12:39 AM Re: Graph testing again, I'm confused, so is mojo :) [Re: SirQuack]
JohnK Offline
shareholder in the making

Registered: 05/11/02
Posts: 10412
Yes, in direct mode there's no bass management, and yes, LFE + Mains can only be applied(as has been pointed out in the past)when the mains are set "Large", because otherwise they don't play the lowest bass, of course.
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#169014 - 05/29/07 07:34 AM Re: Graph testing again, I'm confused, so is mojo :) [Re: JohnK]
MarkSJohnson Online   happy
shareholder in the making

Registered: 09/27/04
Posts: 10966
Loc: Central NH
Quote:

in Randy's case there again appear to be abnormal influences and spirits in his listening room




My room might suck, but that's still better than a whole house that's haunted!
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::::::: No disrespect to Axiom, but my favorite woofer is my yellow lab :::::::

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#169015 - 05/29/07 09:24 AM Re: Graph testing again, I'm confused, so is mojo :) [Re: MarkSJohnson]
SirQuack Offline
shareholder in the making

Registered: 01/29/04
Posts: 13344
Loc: Iowa
Maybe we built our house on an old burial ground. Mojo, have you tried running any of the test using regular CD mode to see if the drivers are moving at the lower freq's?

Also, I forgot to mention that I'm using a HTPC and using SPDIF digital out to my receiver to play the realtraps mp3 files.

ps: Ever since the first time I watched The Shining, I've been haunted.
_________________________
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M22-OWM22-VP100-Denon2805
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#169016 - 05/29/07 02:04 PM Re: Graph testing again, I'm confused, so is mojo :) [Re: SirQuack]
Mojo Offline
connoisseur

Registered: 01/21/07
Posts: 3292
As I described in a post yesterday, the woofers and mids don't respond when in stereo mode (tone controls unby-passed) or any of the surround modes at 10Hz. They only respond in direct mode (tone controls by-passed). I haven't done any extensive testing to see at what frequency they start to respond.

Is this what you were after, Randy?

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#169017 - 05/29/07 02:08 PM Re: Graph testing again, I'm confused, so is mojo :) [Re: JohnK]
bridgman Offline
axiomite

Registered: 08/25/04
Posts: 5446
Loc: Bowmanville, Ontario, Canada
Going from memory, I believe on the H/K receivers Direct is tied to Stereo, ie the UI makes it more clear that this is "bypass everything, analog only, no crossovers, no nothing".

Sounds like the Denon makes it less clear that Pure Direct is the antithesis of Bass Management. It's strange -- everything else in their manuals and UI is so clear and intuitive.

EDIT -- Randy, you realize this means you need to re-do some graphs, right ? Will you be able to get the M60s and EP500 back ? I'm sure their new owner would understand that we are all interested in how the 60/500 and 80/600 compare when the crossover is working properly.

I expect this will mean some significant differences in response around the crossover region (80 Hz).


Edited by bridgman (05/29/07 02:25 PM)

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#169018 - 05/29/07 02:18 PM Re: Graph testing again, I'm confused, so is mojo :) [Re: Mojo]
SirQuack Offline
shareholder in the making

Registered: 01/29/04
Posts: 13344
Loc: Iowa
Yes, I was just curious of your findings with using Stereo mode. So basically using Direct or Pure Direct is like having my mains set to "large" even though I have them on "small".

I'll have to try using Stereo mode when I get a second.
_________________________
M80s-VP180-QS8s-EP600-2xEP350 Denon3808 Outlaw7700
M22-OWM22-VP100-Denon2805
Audio Nirvana

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#169019 - 05/29/07 02:20 PM Re: Graph testing again, I'm confused, so is mojo [Re: bridgman]
Ken.C Offline
shareholder in the making

Registered: 05/03/03
Posts: 17809
Loc: NoVA
I don't think so on the H/Ks. On mine at least, I don't think there's anything that's equivalent to Direct or Pure Direct. I still have bass management in stereo; I still get to set whether it's 2.1 or 2.0.
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I am the Doctor, and THIS... is my SPOON!

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