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
  • 1,728
5 votes

Connect XLR microphone to amplifier

You don't connect a microphone directly to an amplifier, you would normally connect it to a sound board to be able to adjust the eq and volume prior to going to an amp. The sound board includes a ...
AJ Henderson'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
  • 8,890
5 votes

Why aren't amplifiers aimed AWAY from the audience on live shows?

First off… pros don't just decide they want to turn their amp up halfway through a gig. That's what sound crews are for; there's one guy whose job it is to make sure everyone on stage can hear ...
Tetsujin's user avatar
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5 votes

Powered Amp placement in a smaller church setting

If you're running balanced line to the amp you can put it where you want. If not, you need it near the mixer. There's really no other consideration unless it's noisily fan-driven or you need a ...
Tetsujin's user avatar
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5 votes
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Were active speakers a "revolution" in the operation of audio equipment?

The part that says "They also allow you to feed a passive speaker" is not true. There are some consumer products that have one "active" speaker containing the amp for both ...
Data Processing's user avatar
4 votes

How to use a wireless mic with computer mini speakers for trade show

Those are powered speakers, at least they appear to be from a quick glance at the eBay page. Therefore, they have their own amplifier; you should be able to connect them directly to your microphone ...
uint128_t's user avatar
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3 votes

What is the difference between DAC, Sound Card and AMP?

Strictly speaking a "DAC" is a "Digital to Analogue Converter" which is a specific and critical component of the audio processing chain that connects a digital audio processing system with your ...
Mark's user avatar
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3 votes

Why am I hearing weird static nosie on my speakers

I have figured out the problem. We had a netgear wifi router connected to the mixer. It is supposed to enable wireless connectivity to our mixer. If I turned that off, the mic signal doesnt drop and ...
franklins's user avatar
  • 151
3 votes
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What is the best shape for passive sound amplification

The best shape for high frequencies (and some high mid) is the horn. But a horn can actually take many shapes. For example, its walls can be parallel like a didgeridoo. In fact, most, if not all, wind ...
Schizomorph's user avatar
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3 votes
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Matching amplifier with speaker with unknown wattage

Well, it's like a game of Blackjack: to know the answer for sure, you'd have to bust your speakers. If you have any amplifier at home or that you can borrow for a while, connect the speakers, put ...
José David's user avatar
3 votes

How do I connect an amplifier to a PC?

To be honest, this is asking for trouble. I strongly recommend you purchase and use a DI box to isolate the amplifier from the computer. You are likely to experience hum and the DI will help to ...
Mark's user avatar
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3 votes
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Why does digital sound EQ use decibels instead of an amplitude multiplier?

Audio engineering uses decibels, because they are closer to how the human hearing perceives loudness: a double energy level is not twice as loud. A linear scale would require either a very large fader ...
Mantriur's user avatar
  • 146
3 votes

Whine from speakers when there is no audio playing

Computers are notorious for creating various types of electronic noise. When you use the internal sound card of the computer a lot of this electronic noise will be sent out on the audio cable and can ...
ghellquist's user avatar
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3 votes
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What happens when the output impedance of a headphone amp is higher than the input impedance of the headphones?

First a short historical notice. In the old days, professional headphones often where 600 Ohm, sometimes 250 Ohm. The IEC standard from 1996 recommended an output impedance of 120 Ohms for the ...
ghellquist's user avatar
  • 1,614
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
2 votes
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Troubleshooting gain problems between microphone and amp

That microphone is quite LOW SENSITIVITY. If you were a head-banging heavy-metal rock musician screaming into the microphone halfway inside your mouth you would see quite a signficant signal out of it....
Richard Crowley's user avatar
2 votes
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Amplitude Too Low?

From what I can tell your sources sound just fine! You should definitely not record "hotter", i.e. with more gain. And the mixes are in general balanced - I'd be a little harder with compressors here ...
Michael Hansen Buur's user avatar
2 votes
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Headset amplifier (headphone amplifier with mic preamp)

why don't you just plug it into the mic-input on the motherboard?
Mark's user avatar
  • 8,890
2 votes

How to check used amplifiers?

Why not just plug it in to some speakers and see if it produces clean sound? I don't really see why it would be any harder or easier than for speakers. You test both out by trying them. You could ...
AJ Henderson's user avatar
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2 votes
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Speak - amplifier wattage matching

44W at 8 Ohm means delivering 2.3A at 18.8V RMS. Now assuming that the 2.3A can also be delivered at lower voltages (note: that isn't self-evident since it means a larger maximum voltage drop across ...
user21507's user avatar
2 votes
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How to get rid of sharp ticks/clicks when amplifying sound

firstly your normalization factor will be different frame to frame. I cannot think of the application you will be using this for as it will create discontinuities across frame boundaries and introduce ...
Mark's user avatar
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2 votes
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What is the difference between DAC, Sound Card and AMP?

I am looking for a hardware to plug-in the headphones. Please explain WHY you can't just plug them into the existing headphone jack on your device (Macbook?) What is the difference between ... DAC A ...
Richard Crowley's user avatar
2 votes

Converting a 3.5in mic input to line level portably

Most microphones output about 0.0006 volts while line level is about 1 volt or 1.23 The device you want is a microphone preamp to bring the microphone signal up to Line level. If you get one with 1/4"...
Timinycricket's user avatar
2 votes

Dynamic mic to XLR input

So, You have a microphone that works on your PC but not this mixer. And other mics that DO work on this mixer..? I hate to add questions that are better suited comments, but I don't have enough ...
Chuck Floading's user avatar

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