diggy_dude
Now 169% diggier!
Sorry Jim. I misunderstood your equipment set up.
No worries, Henry. Evidently I didn't understand it well enough either.
Setting gain in multi-stage (phono preamp -> 10/4 box -> Presonus interface) setup?
No worries, Henry. Evidently I didn't understand it well enough either.
M
mixsit
Well-known member
Probably to late but- the audio box says -3dBu max in. The Aphex doesn't have to add gain (can even cut by 6 apparently) Wouldn't that mean there's plenty of headroom available at the Presonus's xlr 'mic input for the '-10 line ?
M
moresound
Loud Sun Studios
All good then.
I was in the same boat years back but then I decided to just down load all of my favorite songs instead.
It was less painful.
I was in the same boat years back but then I decided to just down load all of my favorite songs instead.
It was less painful.
fat_fleet
Swollen Member
No kidding. Of my 1000+ records I've only ever run into one I've had to rip, cuz the downloadable version wasn't the same mix and I preferred my vinyl copy. It was years ago and I just ran RCAs right from the turntable to a stereo mic input on the computer. Sounded just fine. The TT does have selectable phono/line output but I can't remember if I even had to use that.
diggy_dude
Now 169% diggier!
The headroom may be restricted a little by the fact that the Presonus is USB bus powered. Some users said there wasn't enough gain for some mics. I was thinking the balanced inputs must be similar to the ones on a channel strip on a desk, albeit underpowered, and maybe the input could be attenuated enough with the two controls to not overdrive them.
bouldersoundguy
Well-known member
Why put +4dBu into a mic input? The 1/4" instrument inputs should have plenty of gain for consumer line level signal. Just use an RCA-1/4" cable.
diggy_dude
Now 169% diggier!
The manual expressly warns not to do that. The instrument inputs are strictly intended for guitars and other low-signal devices. (I can't think of any other devices that use that signal level, so they're pretty much saying "guitars only".) In that regard, they're no more useful than the mic inputs for my purposes. If there's a chance it will work, I'm game. I'd be more confident if I had a way to reduce the signal into the inputs though.
M
mixsit
Well-known member
You'd think their 'max in at the XLRs of '-3 hopefully reflects it's USB powered.
The question would seem not to be gain', but perhaps too high sensitivity.
What I wasn't clear with my quick look at the Aphex is if you can indeed get -10 nominal in at the RCAs and still have -10' out at the XLRs. (I thought that was what they indicated, not sure though..
Might also get away with skipping the Aphex and do RCA x XLR?
M
mixsit
Well-known member
Somebody pull up the doc (again..
Weren't the 1/4" even more sensitive than the XLR?
bouldersoundguy
Well-known member
If the instrument inputs are harmed by a -10dBV signal there's something seriously wrong with the design. Instrument inputs generally more gain than line inputs and less than mic inputs which makes them fairly close to right for consumer line level. Your 10/4 box will only make the level higher when you need it to be lower. Maybe you should try one of the solutions in Rane Note 110. Option #17 would do it.
Last edited:
diggy_dude
Now 169% diggier!
Thanks. I was looking at Rane Note item 10B for this application originally, based on the misconception that the mic input was a regular balanced input. That's what led me to the 10/4 box.
bouldersoundguy
Well-known member
#10 goes from TRS balanced to RCA unbalanced. You want to go from RCA unbalanced to XLR balanced to use the mic input. But I would still try it with the instrument input using an RCA-TS cable.
diggy_dude
Now 169% diggier!
RCA to TS would definitely be the cheapest solution, as I don't have any short XLR cables lying around. Thanks again. 
diggy_dude
Now 169% diggier!
I remember why I was looking at 10B now. I was planning to take the balanced TRS Presonus outputs into a tape deck. The more I think about this, the more I think I should just use tape decks for the whole deal.
S
Saddle
New member
If your AudioBox is the model with just two inputs, you're correct. There is no line input. Instrument or XLR mic input. Your only good option is to build or buy a Line to Mic pad and drop the level down. You can build them right in the XLR connector, and with your setup you may find use for them in the future.
Here is a couple of links:
www(.)uneeda-audio(.)com/pads/
www(.)gearslutz(.)com/board/so-much-gear-so-little-time/74141-how-adapting-line-level-signal-mic-level-input.html
Take the parens out () I can't post a link yet.
Here is a couple of links:
www(.)uneeda-audio(.)com/pads/
www(.)gearslutz(.)com/board/so-much-gear-so-little-time/74141-how-adapting-line-level-signal-mic-level-input.html
Take the parens out () I can't post a link yet.
diggy_dude
Now 169% diggier!
I was expecting to have to do that but wanted to avoid it.
Consumer line level from the tape output of my integrated amp into the Presonus instrument inputs makes the clip LEDs on the AudioBox barely flicker with the input level knobs turned all the way down, which would place it at around 5 or 6 dB below clipping. That's about where it should be anyway. Taking a CD player output into the instrument input overdrives the Presonus a bit more.
The phono preamp arrived with the left channel burned out. I got an immediate refund from the seller. Then I got to thinking about how I have a little Tascam M-06 mixer with phono preamps in storage. The main fader should give me the level control I need.