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I just bought a used studio channel mic preamp and as I got it real cheap- I bought it knowing there was this issue. here is the issue im having and the seller disclosed to me the same issue. it powers up with very low to no sound from the unit with a very distorted/harsh tone when turned all the way up, as that's the only way to hear sound from it. you have to dime the input gain and the master just to get sound from it. its passing signal, tried changing the tube and that didn't solve the issue. does anybody have any ideas for what could be wrong here?

I opened a ticket with presonus, but I thought I would check on here too.
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by frank.crow on Mon Feb 08, 2016 11:18 pm
I am having volume issues too.

Mac Mini (Late 2014)
Processor: 3.0 GHz Intel Core I7
Memory: 16 GB 1600 MHz DDR3
Graphics: Intel Iris 1536 MB
Presonus. Studio One Pro V3
ART Pro Studio Channel II
ART. Pro Pro VLA II
Line 6. Bass POD Pro XT
Line 6. HD 500x
Focusrite Saffire Pro 40
Presonus. V2 Monitor Station
Presonus. FaderPort 8
KRK. Rockit 5 (x2) sub (X1)
KRK. KNS8400 Headphones
Roland A 800 Pro
NI. Maschine MKII
Ibanez. 6 String Bass
Behringer. BXL 3000 Bass Amp

"God's grace" :D
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by frank.crow on Sat Feb 13, 2016 9:51 am
I replaced my interface. The problem seems to be under control now.

Mac Mini (Late 2014)
Processor: 3.0 GHz Intel Core I7
Memory: 16 GB 1600 MHz DDR3
Graphics: Intel Iris 1536 MB
Presonus. Studio One Pro V3
ART Pro Studio Channel II
ART. Pro Pro VLA II
Line 6. Bass POD Pro XT
Line 6. HD 500x
Focusrite Saffire Pro 40
Presonus. V2 Monitor Station
Presonus. FaderPort 8
KRK. Rockit 5 (x2) sub (X1)
KRK. KNS8400 Headphones
Roland A 800 Pro
NI. Maschine MKII
Ibanez. 6 String Bass
Behringer. BXL 3000 Bass Amp

"God's grace" :D
User avatar
by rockgod212 on Sat Feb 13, 2016 7:12 pm
nah, its not my interface's...........there's something wrong. its getting sent back for a repair. I just bought another one for the time being though.
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by blazeberdahl on Sun May 01, 2016 9:25 am
Hi I am using an external pre-amp (Grace M101) with my new PreSonus Audio Box 2 interface. I am a voice actor and recording with my shot gun (senn 416) microphone for Voice over purposes only. I use Logic Pro for my recording program.

Mic is plugged into the pre-amp and using phantom power from the Grace M101. From there I have the pre-amp hooked up to the interface. I believe this is the right order. I have the pre-amps on the PreSonus turned all the way down (since im using the pre-amp on the Grace) and my headphones plugged into the presonus are all the way up. On the grace the pre-amp is turned up only a few notches...not even half way, yet when I speak and record I can hear it peaking (on play back too). Yet, visibly in logic it's hardly visible audio in terms of dbs. I have to zoom way in to see the waves... and more importantly it's barely audible in my headphones, plugged into the Presonus even though I have the headphone knob turned all the way up.

On my mac, I went into preferences and I have audio inputs and outputs set to the presonus on my computer in general...so that's correct I believe. When I tried to adjust the volumes through my computer thinking maybe they were turned down on the computer, it says the selected device has no output controls (and its showing all the way to the right anyway).

How can it be peaking... and yet recording so low in LOGIC and I can hardly hear it on headphones.

It would be nice to be able to hear more clearly exactly what I am recording as I am doing it...

Please help. What am I doing wrong?

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