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Author Topic: AKG 391/393 sound: high freq. "scratchy"/"harsh" distortion?  (Read 2907 times)

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Offline poorlyconditioned

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AKG 391/393 sound: high freq. "scratchy"/"harsh" distortion?
« on: December 31, 2005, 02:27:08 PM »
I've been listening to some of my AKG 391/393 tapes and I've noticed some unpleasant distortion on the high frequencies.  It is somehow "scratchy", or like simbelence (sp?).  I notice this most when I turn the bass way down and the treble way up on playback.

I can't tell if it is the mics, the PA, or my preamp (edirol UA5 stock).

Is this the "harsh" sound some people complain about., eg., on the AKG C1000?  Hmm.  Maybe I need to go to higher cost mics to fix this.  Maybe I'm growing a more expensive ear :)

Comments?

  Richard
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Mics: Sennheiser MKE2002 (dummy head), Studio Projects C4, AT825 (unmodded), AT822 franken mic (x2), AT853(hc,c,sc,o), Senn. MKE2, Senn MKE40, Shure MX183/5, CA Cards, homebrew Panasonic and Transsound capsules.
Pre/ADC: Presonus Firepod & Firebox, DMIC20(x2), UA5(poorly-modded, AD8620+AD8512opamps), VX440
Recorders: Edirol R4, R09, IBM X24 laptop, NJB3(x2), HiMD(x2), MD(1).
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Offline bdasilva

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Re: AKG 391/393 sound: high freq. "scratchy"/"harsh" distortion?
« Reply #1 on: December 31, 2005, 05:54:31 PM »
Only if you try to use them with a battery box.... They do sound fine with the preamps though.
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Offline poorlyconditioned

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Re: AKG 391/393 sound: high freq. "scratchy"/"harsh" distortion?
« Reply #2 on: December 31, 2005, 06:47:25 PM »
Quote from: bdasilva on December 31, 2005, 05:54:31 PM
Only if you try to use them with a battery box.... They do sound fine with the preamps though.

Hey, you dissing my home-made battery boxes :) :)

Actually, I only notice the scratchiness on certain shows, so I'm thinking it could be the PA.  Or it could be that I'm very close to the speaker (less than six feet), and it is very loud.

I'm very happy with my setup, but I did notice quite a bit on a particular recording.  In fact, it was accentuated when I converted my WAV file to ATRAC to playback on my portable MD.

  Richard
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Mics: Sennheiser MKE2002 (dummy head), Studio Projects C4, AT825 (unmodded), AT822 franken mic (x2), AT853(hc,c,sc,o), Senn. MKE2, Senn MKE40, Shure MX183/5, CA Cards, homebrew Panasonic and Transsound capsules.
Pre/ADC: Presonus Firepod & Firebox, DMIC20(x2), UA5(poorly-modded, AD8620+AD8512opamps), VX440
Recorders: Edirol R4, R09, IBM X24 laptop, NJB3(x2), HiMD(x2), MD(1).
** This individual has moved to user "illconditioned" **

Offline bdasilva

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Re: AKG 391/393 sound: high freq. "scratchy"/"harsh" distortion?
« Reply #3 on: December 31, 2005, 07:30:04 PM »
Mic builders rule.... Just givin' yo shit.  I need a set of 91 caps... keep ypur eyes open.   Bought the Mackie (12 + 2 for 14 channesl) Some shows just sound likr that.  Happy Ney Year. Be Happy     Brian
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Cad E300S set.. AT822  AKG C 414 B-XLS/ST  
Dorsey-Mod MK-012 w/ O, C, H and RED L/D Caps
Superlux S502 ORTF   LSD2
Silverpath  Cables> 
Tascam DR-680MKii    DR- 680 (X2)   Tascam DR-40     Sound Devices USBPre    SONY  PMD-M10   Zoom F8

"Buy a Taper a Drink... Prime the Pumps of live Music"


               On the "music" side of the "Music Business"

Offline aberg

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Re: AKG 391/393 sound: high freq. "scratchy"/"harsh" distortion?
« Reply #4 on: December 31, 2005, 07:42:25 PM »
Yeah man, those homemade active AKG's are impressive. If you're going to any cool shows in TO soon, let me know. I might make a little trip.
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Offline treydaman

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Re: AKG 391/393 sound: high freq. "scratchy"/"harsh" distortion?
« Reply #5 on: January 12, 2006, 03:35:12 PM »
I  think you need a pair of mic pads or audio attenuators as they are called..
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Offline poorlyconditioned

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Re: AKG 391/393 sound: high freq. "scratchy"/"harsh" distortion?
« Reply #6 on: January 12, 2006, 03:46:05 PM »
Quote from: treydaman on January 12, 2006, 03:35:12 PM
I  think you need a pair of mic pads or audio attenuators as they are called..

Yeah, thanks for the tip.  I might try that.  Some of these condensers have very hight outputs. The other option I'm considering is going line in.

 Richard
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Mics: Sennheiser MKE2002 (dummy head), Studio Projects C4, AT825 (unmodded), AT822 franken mic (x2), AT853(hc,c,sc,o), Senn. MKE2, Senn MKE40, Shure MX183/5, CA Cards, homebrew Panasonic and Transsound capsules.
Pre/ADC: Presonus Firepod & Firebox, DMIC20(x2), UA5(poorly-modded, AD8620+AD8512opamps), VX440
Recorders: Edirol R4, R09, IBM X24 laptop, NJB3(x2), HiMD(x2), MD(1).
** This individual has moved to user "illconditioned" **

Offline grider

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Re: AKG 391/393 sound: high freq. "scratchy"/"harsh" distortion?
« Reply #7 on: January 12, 2006, 04:05:23 PM »
Quote from: poorlyconditioned on January 12, 2006, 03:46:05 PM
Quote from: treydaman on January 12, 2006, 03:35:12 PM
I  think you need a pair of mic pads or audio attenuators as they are called..

Yeah, thanks for the tip.  I might try that.  Some of these condensers have very hight outputs. The other option I'm considering is going line in.

 Richard


no  I never noticed that problem when I ran 393's, not once; as for attenuators, I believe the AKG mics have an attenuator switch on the body of the mic, I know the 480's do, to use when super close to the amps/stacks/monitors
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