Topic: Lunatec V3 > Mod-SBM1 Attenuator Question

[Kyle]

Bean,


IMO,
The SBM1 you are getting - it has the coax mod - right? So I am guessing that there is a coax out and the female seven pin that is built in. If you are getting a male 7pin to optical for the jb3, give the patchers the coax out from the sbm1. Don't attenuate your signal for the convienience of the patchers. Not trying to sounds like a dick, but your recording comes first. If they want the V3 adc signal, they can take it and then boost the levels in post.

im not really doing it for patchers, just assuming I havent had a patcher in years

I WOULD however like to have a backup or something, so rather than running the v3 low gain and the sbm1 cranked, I wanna run the v3 levels like normal for backup and have the sbm1 copy for kicks

and when I go 24-bit, I can run the v3 full throttle, and the sbm1 as a 16-bit backup/patcher/etc line

w/out attenuators, that would be useless

gotcha - wasn't quite sure what you were trying to do

Kyle-can i borrow the psp-2 sometime possibly? prolly wont be until feb/march

Id love to run psp2>v3 and psp-2>modsbm1

I like to have many options like you

Let's mix it up

I have been wanting to hear the V3>PSP2 combo as well (and w/ the SBM1)
Would love to take those setups on-stage and really hear what they can do...

Lotus Feb 17, its a friday and I'll be there stage-lip mr smalls

lets dooooooetttt!

Id like to run 481>psp-2>v3 maybe and you can run schoeps >v2>modsbm1 or something

I REALLY like my lotus stage lip tapes that are just straight 481>v3

SOOOO much life and energy perfect balance IMO

Haha, that's funny - I was just going to ask you when Lotus was palying here next

I think we have a winner

If I am lucky I will have the Flashcan by then - we can run comps on the adc stage...

[F.O.Bean]

Bean,


IMO,
The SBM1 you are getting - it has the coax mod - right? So I am guessing that there is a coax out and the female seven pin that is built in. If you are getting a male 7pin to optical for the jb3, give the patchers the coax out from the sbm1. Don't attenuate your signal for the convienience of the patchers. Not trying to sounds like a dick, but your recording comes first. If they want the V3 adc signal, they can take it and then boost the levels in post.

im not really doing it for patchers, just assuming I havent had a patcher in years

I WOULD however like to have a backup or something, so rather than running the v3 low gain and the sbm1 cranked, I wanna run the v3 levels like normal for backup and have the sbm1 copy for kicks

and when I go 24-bit, I can run the v3 full throttle, and the sbm1 as a 16-bit backup/patcher/etc line

w/out attenuators, that would be useless

gotcha - wasn't quite sure what you were trying to do

Kyle-can i borrow the psp-2 sometime possibly? prolly wont be until feb/march

Id love to run psp2>v3 and psp-2>modsbm1

I like to have many options like you

Let's mix it up

I have been wanting to hear the V3>PSP2 combo as well (and w/ the SBM1)
Would love to take those setups on-stage and really hear what they can do...

Lotus Feb 17, its a friday and I'll be there stage-lip mr smalls

lets dooooooetttt!

Id like to run 481>psp-2>v3 maybe and you can run schoeps >v2>modsbm1 or something

I REALLY like my lotus stage lip tapes that are just straight 481>v3

SOOOO much life and energy perfect balance IMO

Haha, that's funny - I was just going to ask you when Lotus was palying here next

I think we have a winner

If I am lucky I will have the Flashcan by then - we can run comps on the adc stage...

I MAY have one by then as well, but doubtful, we'll see tho

[Todd R]

Well, I was really just guessing the SBM1 would take +4dbu.  But I just checked the manual in the archive section.  According to the manual, the SBM1 can only take -3.8dbu (500mv) at the line in.  The V3 puts out +19dbu on unbalanced analog out at 0dbFS.  So it looks like to be safe, you'd need 25db attenuators (22.8db to be exact).  Or run the V3 with peaks no more than -24dbFS, which doesn't sound like a good idea if you have patchers or are running a deck straight out of the V3.

[F.O.Bean]

Well, I was really just guessing the SBM1 would take +4dbu.  But I just checked the manual in the archive section.  According to the manual, the SBM1 can only take -3.8dbu (500mv) at the line in.  The V3 puts out +19dbu on unbalanced analog out at 0dbFS.  So it looks like to be safe, you'd need 25db attenuators (22.8db to be exact).  Or run the V3 with peaks no more than -24dbFS, which doesn't sound like a good idea if you have patchers or are running a deck straight out of the V3.

damnit, i have never seen a 25db pad, only 20 and 30

which one would you run todd 20 or 30

[F.O.Bean]

actually, found this, but its expensive

http://www.fullcompass.com/Products/pages/SKU--9310/

[F.O.Bean]

so w/ the -25dB attenuator, I can run the v3 full throttle AND the modsbm1 full throttle

is the -25 db one gonna be enuf to push the sbm1 all the way or should i get a -20dB one and come down a few db's on the modsbm1

[Todd R]

Experimentation is probably the answer, unfortunately.  But I doubt -25db would get you at full throttle (10) on the SBM1.  The -3.8dbu is the highest signal level the SBM1 can take without brickwalling, according to Sony.  I would imagine that would put you at about 4 or so on the SBM1.  As long as you are already putting an attenuator into the circuit, I'd go with the -30db pad.

[F.O.Bean]

Experimentation is probably the answer, unfortunately.  But I doubt -25db would get you at full throttle (10) on the SBM1.  The -3.8dbu is the highest signal level the SBM1 can take without brickwalling, according to Sony.  I would imagine that would put you at about 4 or so on the SBM1.  As long as you are already putting an attenuator into the circuit, I'd go with the -30db pad.

regarding the -30dB pad, what kind of levels would that get me on the sbm1 end tho like -9dB at peaks, correct?

Here is my goal, tyo come to0db or very near at peaks on the v3 AND also the sbm1, w/ out overloading the sbm1, and also having peaks at or very near 0dB at the digi-out of the modsbm1

[Todd R]

regarding the -30dB pad, what kind of levels would that get me on the sbm1 end tho like -9dB at peaks, correct?

Sorry, I don't know what you're getting at here.

Looking again at the SBM1 manual though, it says minimum line level signal is -22dbu (and max is -3.8dbu).  So it looks like it can provide up to about 18db of gain.  Meaning that a -30db attenuator with the V3 at full throttle (+25dbu output balanced, +19dbu output balanced) should get you right in the middle of the usable input level for the SBM1.  I have no idea where that would be on the gain dial of the SBM1, but I'd guess somewhere between say 4 and 8.  If you want to dial in the SBM1 to some exact gain setting (ie, you want it at 9), there is no way you're going to be able to figure that out so exactly without doing a bit of experimentation with the SBM1 and V3.  Personally, I wouldn't bother.  Get the -30db pads and try them out with everyting.  If it turns out they don't work, return them.

[F.O.Bean]

regarding the -30dB pad, what kind of levels would that get me on the sbm1 end tho like -9dB at peaks, correct?

Sorry, I don't know what you're getting at here.

Looking again at the SBM1 manual though, it says minimum line level signal is -22dbu (and max is -3.8dbu).  So it looks like it can provide up to about 18db of gain.  Meaning that a -30db attenuator with the V3 at full throttle (+25dbu output balanced, +19dbu output balanced) should get you right in the middle of the usable input level for the SBM1.  I have no idea where that would be on the gain dial of the SBM1, but I'd guess somewhere between say 4 and 8.  If you want to dial in the SBM1 to some exact gain setting (ie, you want it at 9), there is no way you're going to be able to figure that out so exactly without doing a bit of experimentation with the SBM1 and V3.  Personally, I wouldn't bother.  Get the -30db pads and try them out with everyting.  If it turns out they don't work, return them.

+T todd, THANK YOU very much for your help on this, this tsuff is kind of confusing to me

what i menat by 'full throttle' was running them at or near zero (0dB) so that i dont have to do any normalizing and i also dont wnat the modsbm1 to overload in the process, but id also like the sbm1 levels at or near 0db at peaks as well as the v3

so thats what im gonna do, buy the -30's and go from there

[aberg]

So are you saying you'd be running the V3 with gain full right as well as full right on the sbm1? I'm talking about the knobs....

This stuff sorta confuses me too, and I'm getting some attenuators for my mp-2 so I'm thinking about this stuff from time to time.

[F.O.Bean]

no, not the knobs full throttle, just so peaks are at or near 0db, so i dont have to normalize/change gain in post

I dont think i made myself clear enuf in the earlier posts

[aberg]

no, not the knobs full throttle, just so peaks are at or near 0db, so i dont have to normalize/change gain in post

I dont think i made myself clear enuf in the earlier posts

Ah I see, that makes good sense. Thanks!

[setboy]

Bean

i have some 10/20/30 Attenuators that i think i could let you borrow. if you wanted to test it out before you buy some

Rapahel

[F.O.Bean]

Bean

i have some 10/20/30 Attenuators that i think i could let you borrow. if you wanted to test it out before you buy some

Rapahel

thanks for the offer bud, I may have to take you up on that

I'm itchin to buy the -30 ones tho

Thanks for the offer and I'll be in touch!

Happy Holidays!

Bean