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Author Topic: Newbie AKG 391 Help  (Read 7090 times)

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Offline Chris K

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Newbie AKG 391 Help
« on: July 21, 2003, 12:44:52 PM »
Hi...a newbie here. I was wondering if someone could help me out.

I recently purchased AKG 391's, which should be a step up from the AT822 mic I have been using with my stock sbm1 and d8 rig.

I would still like to use the sbm1 and I would like your suggestions on how to power these mics with phantom power.

Also, how would I get the XLR mic cables to work with the sbm1's 1/4" inputs?

chris k
My gear: JK Labs AKG DVC > M10
              AKG 460 ck61/ck62/ck63 > DR-70D
             
A live concert to me is exciting because of all the electricity that is generated in the crowd and on stage. It's my favorite part of the business, live concerts.
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Offline nickgregory

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Re:Newbie AKG 391 Help
« Reply #1 on: July 21, 2003, 12:47:57 PM »
Before I got an MP-2, I ran 2 AKG B-18 power supplies (2 9 volt batts per supply) and that gave phantom power to the mics.  Basically went xlr from mics to xlr b-18 and b-18 xlr out to rca into mod sbm-1.  The XLR-RCA I had made from www.kindkables.com, but you can probably find it through various retailers.

I know alot of folks use the PS-2 for power, which is another good solution.  

If your interested, the B-18's are just sitting in my closet and not getting any use, I could probably cut you a deal to get then in someone's hands who is using them.

Nick

Offline nickgregory

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Re:Newbie AKG 391 Help
« Reply #2 on: July 21, 2003, 12:48:30 PM »
Oh and by the way, they will be a significant step up from the 822.

Offline geoff piper

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Re:Newbie AKG 391 Help
« Reply #3 on: July 21, 2003, 12:49:01 PM »
Hi...a newbie here. I was wondering if someone could help me out.

I recently purchased AKG 391's, which should be a step up from the AT822 mic I have been using with my stock sbm1 and d8 rig.

I would still like to use the sbm1 and I would like your suggestions on how to power these mics with phantom power.

Also, how would I get the XLR mic cables to work with the sbm1's 1/4" inputs?

chris k

B18 they are the AKG power souce. Or you could sell you Sbm1 and buy my UA-5 ;)

Offline Brian Skalinder

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Re:Newbie AKG 391 Help
« Reply #4 on: July 21, 2003, 12:56:54 PM »
The Denecke PS-2 is a very popular and relatively inexpensive phantom power box.  Add in a couple line transformers and run line-in (RCA inputs) on the SBM-1 instead of mic-in.  The SBM-1 mic pre isn't so hot, the line transformers will sound much better.

Although, if you get a deal on Nick's B18s that's a fine way to go.  Regardless of which power source, I recommend using the line transformers:

391 > PS2 or B18s > line transformers > 1/4"/RCA adapters > SBM-1

See:  http://www.taperssection.com/yabbse/index.php?board=14;action=display;threadid=2454;start=msg17699#msg17699
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Offline nickgregory

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Re:Newbie AKG 391 Help
« Reply #5 on: July 21, 2003, 01:01:17 PM »
Brian makes a good point.  I used a couple of the AT CP8201 line transformers (can be had at guitar center for under $20 each) to give me a bit of gain to work with and it was nice to work with the extended headroom.  Since I use the Mod-SBM-1, the 1/4" was not available to me, but I agree with Brian, that may be the easiest way to feed the SBM-1.

Specific questions, feel free to PM me.  I ran 391(3)s>B18s>AT-CP8201>Mod SBM-1>D100 for over a year, and may be able to help out.

Nick

Offline Chris K

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Re:Newbie AKG 391 Help
« Reply #6 on: July 21, 2003, 03:04:00 PM »
thanks nick, brian, and goeff for the fast responses.  ;D

ok, so now i know the sbm1 1/4" mic inputs are to be avoided, although they seemed to work well with the AT822.

So if i get the phantom power unit, and the line transformers, and the 1/4" to rca connectors i should be set...but won't there be audio degradation from all the changes (xlr>1/4">rca)?

Do you set the levels the same with the rca inputs as with the 1/4" mic inputs on the sbm1? As you can tell, I have never used the rca's on the sbm1.

thanks....chris k
My gear: JK Labs AKG DVC > M10
              AKG 460 ck61/ck62/ck63 > DR-70D
             
A live concert to me is exciting because of all the electricity that is generated in the crowd and on stage. It's my favorite part of the business, live concerts.
-Elvis Presley

Offline nickgregory

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Re:Newbie AKG 391 Help
« Reply #7 on: July 21, 2003, 03:09:56 PM »
No, actually the 1/4" are fine for your use, they are just disabled by Oade for the modified unit which I have.  With regards to degradation, unless you are using crap cables or transformers (stay away from Radio Shack brand - a friend got humming from them...), you will not notice it.

On levels, the levels are set the same way on the SBM regardless of how the signal is input.

Offline Brian Skalinder

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Re:Newbie AKG 391 Help
« Reply #8 on: July 21, 2003, 04:23:52 PM »
ok, so now i know the sbm1 1/4" mic inputs are to be avoided, although they seemed to work well with the AT822.

The 1/4" inputs will work just fine, but IMO the RCA line-level inputs with transformers will sound better.

Try a comparison sometime.  I did and noticed a big difference.  That said, nothing wrong with using them if that's what you like!
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Offline caymanreview

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Re:Newbie AKG 391 Help
« Reply #9 on: July 21, 2003, 07:06:06 PM »
i personally run 391s > ps2 > Hosa MIT 176 line transformers(with rca end upgrade!!!) > ModSbm1 > m1

i really love my setup, especially the line transformers with the rca upgrade to go straight into the sbm1

available from oade with the rca mod, i believe, bought mine used

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Re:Newbie AKG 391 Help
« Reply #10 on: July 22, 2003, 07:50:49 PM »
Get the sbm-1 modded also, makes things all nice and warm
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Re:Newbie AKG 391 Help
« Reply #11 on: July 23, 2003, 07:16:57 AM »
i myself am a big fan of the modsbm1!!!

Offline Chris K

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Re:Newbie AKG 391 Help
« Reply #12 on: July 23, 2003, 10:46:03 AM »
Get the sbm-1 modded also, makes things all nice and warm

i myself am a big fan of the modsbm1!!!

ok...so what mod specifically are you talking about...oade has 3 listed? lemme know...sounds interesting
My gear: JK Labs AKG DVC > M10
              AKG 460 ck61/ck62/ck63 > DR-70D
             
A live concert to me is exciting because of all the electricity that is generated in the crowd and on stage. It's my favorite part of the business, live concerts.
-Elvis Presley

Offline nickgregory

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Re:Newbie AKG 391 Help
« Reply #13 on: July 23, 2003, 10:51:51 AM »

ok...so what mod specifically are you talking about...oade has 3 listed? lemme know...sounds interesting

the line mod....the expensive one...but well worth it

Offline Chris K

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Re:Newbie AKG 391 Help
« Reply #14 on: July 23, 2003, 11:08:35 AM »
saw that one coming...it's the EXPENSIVE one

any idea what the turnaround is for the mod....i guess i should go ask oade, but...uh....does anyone know how long they'll have it?
My gear: JK Labs AKG DVC > M10
              AKG 460 ck61/ck62/ck63 > DR-70D
             
A live concert to me is exciting because of all the electricity that is generated in the crowd and on stage. It's my favorite part of the business, live concerts.
-Elvis Presley

 

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