 Re: Sub setup + 6'
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Joined: Jan 2004
Posts: 13,840 Likes: 13
shareholder in the making
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shareholder in the making
Joined: Jan 2004
Posts: 13,840 Likes: 13 |
Everyone has a different definition for these terms, it is like "bright", "warm", etc...
M80s VP180 4xM22ow 4xM3ic EP600 2xEP350
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Re: Sub setup + 6'
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Joined: Oct 2005
Posts: 853
aficionado
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aficionado
Joined: Oct 2005
Posts: 853 |
Quote:
I'm trying to tie the terms and the sounds together. Tight to me means crisp and not boomy. I don't know about slow in relation to bass. Does it mean that I hear the bass notes later than I should; that they are out of sync?
Boomy bass means you are hearing echoes or resonances of the same notes at successively lower amplitudes. More often than not those resonances originate from the room, but to some degree from the sub. The Axiom subs are nice tight sounding subs with a minimal amount of ringing especially considering they are a vented design. Many inferior ported subs suffer from boomy bass or overhang from port resonance. However even the EP subs if they are badly calibrated, out of phase with the mains or another sub, or misplaced, will boom.
John
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Re: Sub setup + 6'
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Joined: Jan 2007
Posts: 10,490 Likes: 116
shareholder in the making
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shareholder in the making
Joined: Jan 2007
Posts: 10,490 Likes: 116 |
Quote:
Its more accurate to simply add 3 ft to for each processing step which accounts for the 2.5-3.0 milliseconds of delay before the signal reaches the drivers.
What do you mean? If my sub is 10 feet away from me, does this mean I need to add set the distance setting in the receiver to 13 feet?
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Re: Sub setup + 6'
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Joined: Jan 2007
Posts: 10,490 Likes: 116
shareholder in the making
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shareholder in the making
Joined: Jan 2007
Posts: 10,490 Likes: 116 |
Quote:
That is interesting about the def of "tight" & "slow". I hear that all the time but don't know what it means. I'm trying to tie the terms and the sounds together. Tight to me means crisp and not boomy. I don't know about slow in relation to bass. Does it mean that I hear the bass notes later than I should; that they are out of sync?
Tight.
Slow. Read the text by the picture of the driver.
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Re: Sub setup + 6'
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Joined: Oct 2005
Posts: 853
aficionado
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aficionado
Joined: Oct 2005
Posts: 853 |
Quote:
Quote:
Its more accurate to simply add 3 ft to for each processing step which accounts for the 2.5-3.0 milliseconds of delay before the signal reaches the drivers.
What do you mean? If my sub is 10 feet away from me, does this mean I need to add set the distance setting in the receiver to 13 feet?
Yes adjust it to 13ft to compensate for the additional time delay from the subs DSP. Doesn't sound like much but a few milliseconds of signal delay will add phase artifacts and smearing of the sound.
I'd suggest going to 13ft and then spice to taste by adding or take away a foot to determine where it sounds tighter. Its bound to sound better compared to an auto equalization feature which gets messed up by room resonance or sub ringing . However depending on your room and how the sub is crossed to the mains, the change may be subtle. Most people who have used that tweak have reported tighter bass.
John
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Re: Sub setup + 6'
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Joined: Mar 2005
Posts: 340
devotee
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OP
devotee
Joined: Mar 2005
Posts: 340 |
Is this true for any sub or just Axiom subs with the DSP?
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Re: Sub setup + 6'
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Joined: Oct 2005
Posts: 853
aficionado
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aficionado
Joined: Oct 2005
Posts: 853 |
Only subs with DSP processing. In fact it applies to any DSP device you insert in the signal path. In Randy's case for example he also has a SMS digital equalizer in the subs signal path so he is delaying 6 ft, 3ft for the 600's DSP and 3ft for the SMS DSP. For subs without DSP use normal distance then experiment up and down a foot or two at a time and listen if the bass tightens up.
The distance setting will also depend on how much the sub is in phase with the main speakers. If you have the sub well calibrated to the mains, it should not sound much different from the normal distance (after adjustment for processing). If you find that the sub tightens up with a big variation from the normal distance, it is likely that you need to work on getting the sub more in phase with the mains.
John
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Re: Sub setup + 6'
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Joined: Jan 2007
Posts: 10,490 Likes: 116
shareholder in the making
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shareholder in the making
Joined: Jan 2007
Posts: 10,490 Likes: 116 |
I tried changing the distance on my sub setting from 0 feet all the way up to the max my receiver allows (28 feet I think) about a month ago. My ears could not hear a difference. I know I listened very critically but I will try this again when I get some time. By the way, according to my audiologist, within the limits of her equipment, my ears are "mutant-like"  . I definitely do hear a big difference when I adjust the delays on my surrounds though. Any thoughts on why I don't hear a difference with different sub delay settings?
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Re: Sub setup + 6'
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Joined: Sep 2004
Posts: 11,458
shareholder in the making
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shareholder in the making
Joined: Sep 2004
Posts: 11,458 |
Quote:
Any thoughts on why I don't hear a difference with different sub delay settings?
The much longer wavelengths make bass frequencies harder to localize in both space and time....
::::::: No disrespect to Axiom, but my favorite woofer is my yellow lab :::::::
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Re: Sub setup + 6'
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Joined: Oct 2005
Posts: 853
aficionado
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aficionado
Joined: Oct 2005
Posts: 853 |
Are you listening with the mains on? If so you should hear the difference since you are adding much less delay as you increase distance. If your room is lively (ie very resonant)you will have a more difficult time hearing the best distance setting. As I recall from your pictures, you have bare walls in your HT so I suspect you are getting alot of LF reflections and standing waves in room. It will be more subtle, but there should be a setting where drums sound snappier and bass guitar notes decay more quickly. If you still can't tell don't worry about it and just leave it at the normal plus 3ft distance. It likely indicates a need for bass traps/room treatments.
John
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