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6 votes

Why do some audio amps use AC while others use DC

Is AC current fundamentally better as a working current when it comes to amplifying audio signal? No. If anything, using an AC power supply makes it more difficult to have low noise. The circuits ...
Hobbes's user avatar
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5 votes
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Why do some audio amps use AC while others use DC

The type of current is actually completely irrelevant as all transmitted power is AC. Unless you are driving your amplifier from batteries, everything has to be converted at some point to DC. The end ...
Mark's user avatar
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3 votes
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How to wire signal return on balanced input?

I would read return of signal as the presence of an audio signal on any input (well, a signal above -40 dBu). There seem to be an alternative to wake up the amplifier from sleep mode which is to short ...
audionuma's user avatar
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3 votes

Difference between Level, Signal Strength, Amplitude and Volume?

In Hi-Fi audio circles, Professional audio circles, Amateur audio circles, and other places, these four terms simply do not have definitions that are distinct from each other. In a lot of situations ...
Sotto Voce's user avatar
2 votes
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Cable vs wireless connection from amplifier to speaker

The role of an audio power amplifier (be it a traditional hi-fi amplifier, the embedded amplifier in powered loudspeakers, or the small amplifier that drives the headphones of your smartphone) is to ...
José David's user avatar
1 vote

Difference between Level, Signal Strength, Amplitude and Volume?

This is what my experience and education tells me. Amplitude is related to power, it's the actual height of a wave from zero. Any wave (When we're talking waves here, "height" is of the ...
n00dles's user avatar
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1 vote

Difference between Level, Signal Strength, Amplitude and Volume?

Not sure if you are looking for a scientific extremely detailed answer but the way I think of them in a practical sense is Level: numerical value going in or out of a device Signal strength: general ...
Timinycricket's user avatar
1 vote

Low Passed Sound Quality, Connecting Pro Soundcard to Consumer Hifi Amp. Level matching?

A balanced line-level output usually has TRS (tip-ring-shield) 1/4" connectors. Connecting them to an unbalanced input requires the use of mono cables which short R with S (ring/return with shield) ...
user20770's user avatar
1 vote
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Can I use an AKG WMS40 wireless system to transmit a signal coming from a headphone jack?

According to the service manual (available on the AKG website) the phantom power is 3.9v and is connected to pin 3, so the microphone connector should have pins 2 and 3 shorted. If I understand this ...
Paul Hill's user avatar
1 vote

Is it possible for Matlab to read and decode an mp3 file?

Supported codecs and containers for the audioread function of matlab can be found at: https://www.mathworks.com/help/matlab/ref/audioread.html
Mark's user avatar
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1 vote
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What causes voltage potential to alternate in a ground loop?

Thing is, that if two points in a circuit are actually "ground" (i.e. 0V potential) then by definition, no current can flow between these two points. When current does flow between two arbitrary ...
Mark's user avatar
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1 vote

What causes the spike in PCM signal?

These spikes are high frequency components contained in the resulting signal decode. There are two possible reasons for this. Method one uses a low pass filter which removes these components. Method ...
Mark's user avatar
  • 8,900
1 vote

Do some dedicated sound cards have a "stronger" line-out signal than on-board chips?

There are sound cards with higher line out level, these are interfaces with a pro line out whose nominal level is + 4 dBu (compared to the -10 dBv of a consumer line out). That's around 1.2 V vs 0.3 V....
audionuma's user avatar
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1 vote

How do I keep my guitar signal from clipping in logic pro x with UA Apollo Twin?

You can't change the signal level that that's recorded from Logic, Logic will record the signal it gets bit for bit. You can change the monitoring level in Logic and that's what you're hearing when ...
motoservo's user avatar

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