Topic: Preamp Use | Allen & Heath Digital Community

Preamp Use

Tagged: Preamps

This topic contains 18 replies, has 9 voices, and was last updated by [XAP]Bob 8 years, 7 months ago.

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2015/09/17 at 5:21 am #50541

Barnesaut
Participant

Hi – Im new here.
What signals do you use the Preamp for?

just Mic or line too?

Thx

Bernhard

2015/09/17 at 6:02 am #50544

[XAP]Bob
Participant

The preamp handles a wide range of signals

The block diagram on page 80 shows that the gain control handles both line and mic inputs

2015/09/17 at 7:12 am #50546

Barnesaut
Participant

I mean – is it usefull for sound enhancement to use the preamps?

2015/09/17 at 7:27 am #50548

[XAP]Bob
Participant

Run yourself a double blind test 😉

I’d suggest that the answer lies in personal preference as much as anything else.

2015/09/17 at 10:01 am #50556

MarkPAman
Participant

I’m struggling to see how you could not use the preamps…

2015/09/17 at 10:22 am #50557

[XAP]Bob
Participant

I presume XLR vs Jack input has some different signal pathway…

2015/09/17 at 4:16 pm #50567

Andreas
Moderator

The “different” signal path between XLR and Jacks is a set of damping resistors to reduce the line level to something acceptable for the wide-gain mic preamp. Maybe we’re talking about some external preamp????

2015/09/17 at 4:37 pm #50568

[XAP]Bob
Participant

You could use different preamps, use a dSnake box, or a USB B streaming input.

2015/09/17 at 4:44 pm #50571

Dick Rees
Participant

Every XLR, 1/4″ and/or 3.5mm input goes through a pre-amp. The pre is an integral part of the circuitry.

2015/09/21 at 2:08 pm #50664

Lou
Participant

Dick, that is not so. Mic pres are on mic inputs, but the stereo inputs have one less stage of amplification. Don’t confuse the nube!

L

2015/09/21 at 6:19 pm #50672

airickess
Participant

Lou, according to my experience and the block diagram in the manual every input is routed through the Preamp knob.

2015/09/21 at 6:39 pm #50673

mervaka
Participant

The fact there is a gain stage does not imply the gain is analogue. USB for example is definitely a digital trim.

2015/09/21 at 6:42 pm #50674

Lou
Participant

Yes, but are the stereo line ins having mic pre gain? I think not, but looking right now. There is a trim control; but no mic preamp… on the ST inputs. Same knob, different function.

2015/09/21 at 9:07 pm #50681

Anonymous

to settle
In actual fact if you use the Mic input.
You can get a weak signal from the line output.
What you would use that signal for I have no idea.
Its all in the box these days.

2015/09/21 at 11:06 pm #50684

Lou
Participant

That settles nothing! Maybe I can use the 16 line ins as direct outs for recording?!? Bears experimentation…
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