Dav Bg1

  • Thread starter Thread starter Supercreep
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Allright.., 66 gain versus 59.., how much of a difference does that really make?

And about modding the BG1 to 66 gain. Someone stated earlier that it was set to 59 because of the heat issue, but DAV will mod it to 66 gain anyway.

If heat is the reason for it being set at 59 in the first place, shouldn't having it modded to 66 gain be a reason for concern?
 
What's this talk about heat? I find it hard to believe heat would be an issue, there isn't much of anything in there to generate heat. My DAV BG-1 runs cool, I don't think the case heats up at all.
 
lright.., 66 gain versus 59.., how much of a difference does that really make?

And about modding the BG1 to 66 gain. Someone stated earlier that it was set to 59 because of the heat issue, but DAV will mod it to 66 gain anyway.

If heat is the reason for it being set at 59 in the first place, shouldn't having it modded to 66 gain be a reason for concern?

what does gain have to do with heat??you must be talking about the strength of the signal...ie THAT SIGNAL IS HOT!

Heat (in temperature terms) has NOTHING to do with how much gain a preamp has...they were talking about signal strength, man. This is how rumours get started. Taken out of context.

f heat is the reason for it being set at 59 in the first place, shouldn't having it modded to 66 gain be a reason for concern

This isnt an issue, but for future reference...if Mick offers to change the gain on one of his products...you can BANK on the fact that doing so wont cause any problems. He won't ever undertake something that will cause issues for the user.

teddy
 
It is the heat Is a slang term. Not literal at all..Meaning it is good...
Who said 66 was best? Im sure the designer knows what is most sensible for his products.

Sterling30 said:
I obviously misunderstood, and if 66g is best it would seem more sensible to set them all at that rate in the first place..

"actually it isnt exactly the same..same mic pre...but the BG2 has 22-66db of gain, where as the BG1 has 26-59. and yes, it is the heat.

Teddy"

http://www.gearslutz.com/board/showthread.php?t=71917&highlight=bg1
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Please help

Well that just fucking sucks.


I can't even sing into it - with the pad engaged - from four feet away into the c42 to a MOTU 896HD without clipping. It's just too fuckin' hot going in.

Fuck!

Please tell me I'm doing something wrong or the pre isn't working correctly because I've got a 700 dollar paperweight otherwise.
 
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I emailed Mick and asked if he had any suggestions.

/frustrated/
 
Extraordinary that it's that hot going into the MOTU, from a mic. I've had circumstances where I've overloaded my converters, but that was pumping a line level source through the BG-1. That's much more level than a mic can put out.

Are you sure the MOTU was operating at +4? And you are sure the output of the BG-1 is routed to a line level input on the MOTU, not another preamp input? What you are describing sounds like a preamp feeding another preamp.
 
OK, finally got to play with it tonight - my BG-1, my flugel, and my AEA R84.

Sweet.

Still not convinced the BG-1 has quite enough gain, but it works. And I know my gain staging is going to need some work, but still, really nice pre.

I think I will submit some clips tomorrow night of both flugel and trumpet, if you guys are interested.

And Teddy, don't tell me you told me so, OK? :D
 
;) ;) ;) ;) ;)
fraserhutch said:
OK, finally got to play with it tonight - my BG-1, my flugel, and my AEA R84.

Sweet.

Still not convinced the BG-1 has quite enough gain, but it works. And I know my gain staging is going to need some work, but still, really nice pre.

I think I will submit some clips tomorrow night of both flugel and trumpet, if you guys are interested.

And Teddy, don't tell me you told me so, OK? :D
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SonicAlbert said:
Extraordinary that it's that hot going into the MOTU, from a mic. I've had circumstances where I've overloaded my converters, but that was pumping a line level source through the BG-1. That's much more level than a mic can put out.

Are you sure the MOTU was operating at +4? And you are sure the output of the BG-1 is routed to a line level input on the MOTU, not another preamp input? What you are describing sounds like a preamp feeding another preamp.
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It's set to +4.

I don't know if it is actually operating at that level.

Thanks for the reply, Sonic.
 
Supercreep said:
The motu has +4 and -10 inputs and it behaves the same way through each.

Fuck!

I see I can't hook it up to my RNC because it has unbalanced inputs.

Would somthing like the A Designs ATTY attenuator work?

http://www.frontendaudio.com/A_Designs_ATTY_Stereo_Passive_Line_Attenuator_p/1001.htm
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You so crazy. Make sure the switch on the back of the MOTU to the left of where you plug in the cable from the DAV's output is NOT in the "mic" position. It should probably be flipped to "line," but I'm not sure what "fixed" is on the unit.

EDIT: I just found this in a description of the MOTU:
Neutrik™ connectors accept XLR or 1/4” inputs. Plug in a mic, guitar or synth to 24-bit, balanced or unbalanced 192kHz inputs. Each input is switchable to accept mic or line level signals, with additional front-panel trim – or completely bypass the trim circuit with the +4/fixed setting.
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So what does this tell us? 1.) you can hook up an unbalanced signal. 2.) you should probably set the input switch on the back to the middle "fixed" position when you plug in an outboard preamp through it. If you are still having problems, yes the ATTY would be useful.
 
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Disconnect pin 3 (cold) when you go from the BG1 to an unbalanced input.
 
Reggie said:
You so crazy. Make sure the switch on the back of the MOTU to the left of where you plug in the cable from the DAV's output is NOT in the "mic" position. It should probably be flipped to "line," but I'm not sure what "fixed" is on the unit.

EDIT: I just found this in a description of the MOTU:

So what does this tell us? 1.) you can hook up an unbalanced signal. 2.) you should probably set the input switch on the back to the middle "fixed" position when you plug in an outboard preamp through it. If you are still having problems, yes the ATTY would be useful.
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thanks, Reggie. I was looking to use the RNC as a level attenuator but it has unbalanced inputs.

When we're talking about "disconnecting pin three" we're talking about just pulling the pin out of the xlr cable? How do you reccommend doing this?
 
Supercreep said:
thanks, Reggie. I was looking to use the RNC as a level attenuator but it has unbalanced inputs.

When we're talking about "disconnecting pin three" we're talking about just pulling the pin out of the xlr cable? How do you reccommend doing this?
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No, make a special cable by clipping the lead to pin 3 inside the XLR connector.

But even that might not be necessary. If you connect using an XLR-TRS cable, that will simply ground pin 3. A preamp should be designed not to care if its signal is grounded, but I don't know the specifics of the BG1, check its documentation to be sure.
 
I definitely think there is a setup problem and not a defective thing going on. Check point by point and make sure that everything is hooked up correctly (and all switches are correct) before you start looking for work arounds.
 
I spoke with Mick from DAV and MOTU.

Motu tech support is confused and suggests an attenuator after throwing up it's hands in abject confusion. The support technician, I got the feeling, had really no idea what the problem was or what he was supposed to do about it.

Mick says he spoke to MOTU and suggests I use the line level input (I take this to mean that the onboard trim can be used to attenuate the incoming signal).

Folks at GS think the +4 is still just too sensitive on the MOTU.

I ordered the ATTY from A Designs for two reasons:

1) If the problem really is overloading the AD (which, looking at the waveforms, I can't imagine it being anything else) this will solve that problem.

2) If the problem is with the DAV (doubtful) then I can still use the ATTY for my monitors.


Updates as they come - and thanks, everyone, for your valuable responses. I really appreciate them.

-Casey
 
Yeah, I bet MOTUs support strongly contrasts with Mick's service. Mick is the man! Very helpful. Good luck, and congrats on that fine piece of machinery!



Supercreep said:
I spoke with Mick from DAV and MOTU.

Motu tech support is confused and suggests an attenuator after throwing up it's hands in abject confusion. The support technician, I got the feeling, had really no idea what the problem was or what he was supposed to do about it.

Mick says he spoke to MOTU and suggests I use the line level input (I take this to mean that the onboard trim can be used to attenuate the incoming signal).

Folks at GS think the +4 is still just too sensitive on the MOTU.

I ordered the ATTY from A Designs for two reasons:

1) If the problem really is overloading the AD (which, looking at the waveforms, I can't imagine it being anything else) this will solve that problem.

2) If the problem is with the DAV (doubtful) then I can still use the ATTY for my monitors.


Updates as they come - and thanks, everyone, for your valuable responses. I really appreciate them.

-Casey
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