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#74312 - 12/22/05 11:29 AM Re: SMS-1 user feedback coming soon...
gonk Offline
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Registered: 03/21/01
Posts: 14054
Loc: Memphis, TN USA
Cool - that was something I was trying to figure out. I didn't want the crossover active with the 990 already handling bass management, but I found no way to disable the crossover (scrolling up past 199 seemed like a possible method, but it just rolled back around on me). I'll give the reset trick a try.
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#74313 - 12/22/05 03:10 PM Re: SMS-1 user feedback coming soon...
blueair Offline
Gunslinger

Registered: 12/04/05
Posts: 19
Quote:
in my situation the auto setup tried to boost to max(+6) in the lowest portions of the frequency curve while lowering the mid and upper range to almost -12. grantd i don't have a good sub at the moment...waiting on the new HSU VTF3-HO. there would have been a good chance that i would have damaged my sub had i not adjusted it.
Make sure your not trying to boost a null... and even if not a null, 2-3Db boost could be ok but no more than that… I don’t remember the "formula" but for every xDb boost, your sub will have to work x amount of time harder to compensate and it can be very stressful for your sub... Good thing you knew about that stuff and didn't trust the auto setup (your poor sub would have taken a big hit)...
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Elite PRO-710HD - RPTV
Elite VSX-39TX - Receiver/Amp
Elite DV-37 - DVD Player
Elite M-10X - Back Surround Amp
BP2002TL - Main
C/L/R 2500 - Center
BPX - Surround
UIW64/A - Back Surround
PB12-Plus/2 - Subwoofer
DSP1124P - EQ (Subwoofer Only)

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#74314 - 12/22/05 03:47 PM Re: SMS-1 user feedback coming soon...
jongaro Offline
Gunslinger

Registered: 04/09/05
Posts: 19
Loc: sacramento
disabling the crossover for the sms is in the manual but again it is very obscure. i was tipped off about it by the guys at outlaw tech.

i actually didn't know about how damaging the boost could be until i was told about it. but i wasn't trying to boost areas of my sub output where my sub didn't have any smile
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#74315 - 12/22/05 04:50 PM Re: SMS-1 user feedback coming soon...
gonk Offline
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Registered: 03/21/01
Posts: 14054
Loc: Memphis, TN USA
Sure enough, I found mention in the manual of both the "RESET" trick for disabling the crossover and of the ability to adjust each EQ channel to the desired frequency. It appears that the Velodyne DD sub manual has a few extra screen shots along with nearly the same text compared to the SMS-1 manual.
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#74316 - 12/22/05 08:13 PM Re: SMS-1 user feedback coming soon...
wingnut4772 Offline
Desperado

Registered: 01/12/05
Posts: 368
Loc: Miami
Quote:
Make sure your not trying to boost a null... and even if not a null, 2-3Db boost could be ok but no more than that… I don’t remember the "formula" but for every xDb boost, your sub will have to work x amount of time harder to compensate and it can be very stressful for your sub... Good thing you knew about that stuff and didn't trust the auto setup (your poor sub would have taken a big hit)...
Does this mean that the auto EQ could possibily fill in nulls to a dangerous degree? I have some serious nullage in my room . I just got this today and I am going to set it up tomorrow.
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#74317 - 12/23/05 09:10 AM Re: SMS-1 user feedback coming soon...
blueair Offline
Gunslinger

Registered: 12/04/05
Posts: 19
Quote:
Does this mean that the auto EQ could possibily fill in nulls to a dangerous degree? I have some serious nullage in my room . I just got this today and I am going to set it up tomorrow.
If a particular dip in your FR doesn't respond to EQ attempts, it's most probably a room induce null. Nulls tend to be sharp and deep. Some people locate their sub where there are fewer nulls and then only cut the peaks... There is nothing wrong with boosting (IN MODERATION) when you are sure it's not a null. You can't overcome severe nulls with EQ, period. Just watch out for cone overdrive, loss of headroom, and amp clipping...
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Elite PRO-710HD - RPTV
Elite VSX-39TX - Receiver/Amp
Elite DV-37 - DVD Player
Elite M-10X - Back Surround Amp
BP2002TL - Main
C/L/R 2500 - Center
BPX - Surround
UIW64/A - Back Surround
PB12-Plus/2 - Subwoofer
DSP1124P - EQ (Subwoofer Only)

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#74318 - 12/23/05 09:48 AM Re: SMS-1 user feedback coming soon...
wingnut4772 Offline
Desperado

Registered: 01/12/05
Posts: 368
Loc: Miami
OK but the SMS won't try to fill that in automatically to get a flat response? I am just concerned because I am kind of new at this whole EQ thing that I won't catch it if it does. I was reading the manual last night and my head spun.
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#74319 - 12/23/05 10:02 AM Re: SMS-1 user feedback coming soon...
blueair Offline
Gunslinger

Registered: 12/04/05
Posts: 19
Someone else will have to jump in and reply since I don't own an SMS and I'm not familiar with the algorithm it might use in the automatic mode...
_________________________
Elite PRO-710HD - RPTV
Elite VSX-39TX - Receiver/Amp
Elite DV-37 - DVD Player
Elite M-10X - Back Surround Amp
BP2002TL - Main
C/L/R 2500 - Center
BPX - Surround
UIW64/A - Back Surround
PB12-Plus/2 - Subwoofer
DSP1124P - EQ (Subwoofer Only)

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#74320 - 12/23/05 10:52 AM Re: SMS-1 user feedback coming soon...
gonk Offline
Desperado

Registered: 03/21/01
Posts: 14054
Loc: Memphis, TN USA
The SMS's automatic software most likely leaves the EQ's at their default frequencies (that would massively simplify the number of variables being addressed), so if a null hit at one of those EQ frequencies it would probably increase the EQ to the max. The danger that exists with manual EQ is that you can stack two EQ channels at the same point and push both to the limit to address such a null - at which point the sub's driver is being asked to operate at 12dB higher output at that point than the baseline, which could be considered similar to asking the sub to run 12dB "hot" (something that could be painful to a driver when you throw some deep bass at it).
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#74321 - 12/23/05 11:56 AM Re: SMS-1 user feedback coming soon...
wingnut4772 Offline
Desperado

Registered: 01/12/05
Posts: 368
Loc: Miami
My brain is still not graspng this. I am sure that it is simpler than I am making it. I am going to give Steve a call.
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