All Questions
69
questions
0
votes
2
answers
274
views
Noise issue when powering several audio devices from the same power source
I'm working on my portable music production setup and I'm having noise issues due to connecting all my gear to the same power source.
I have three devices (a sampler, a keyboard/synthesizer and a ...
- 3
0
votes
0
answers
25
views
How do I calculate or estimate how long a battery operated circuit will power an audio exciter?
I understand that this question has a lot of moving parts to it and I am quite a noob.
I have a battery operated circuit which in turn powers a planar audio exciter (such as this one: https://www....
- 11
2
votes
3
answers
263
views
What is an efficient way for distributing equal power to multiple audio amps?
I'm working on an audio system prototype that requires cables passing through active speakers in series. As cables will have different lengths, I'm counting on voltage drops along the way. Is there an ...
- 423
2
votes
2
answers
100
views
An old 9 V inverter circuit
I wanted to discuss and ask questions about an old inverter circuit I built 15 years ago when I was studying; the circuit was powered with an ordinary 9 V battery-Duracell type, and steps the AC ...
- 21
1
vote
5
answers
258
views
What is the correct way of amplifying the output of an active filter?
I have been trying hard to implement a narrow band pass filter using operational amplifiers.
Here is the circuit:
So far, I was able to get correct result in spice simulations, but when I put the ...
- 13
5
votes
1
answer
453
views
What part of wattage am I not understanding?
I was looking on the bottom of an electronic product and I noticed it stated these two things:
Input: 5V 2A Audio output: 15 W
I was taught V x A = Watts
How is this device taking what I assume is 10 ...
- 153
3
votes
2
answers
202
views
Audio: Resistance and power
I'm choosing between two USB DACs for a pair 32 Ω headphones and need to choose the one with the greater output, i.e. with the greater loudness. One DAC has a maximum power rating of 18 mW at 16 Ω and ...
- 55
0
votes
1
answer
105
views
Measuring the power output of an amplifier with floating outputs
I have a d-type amplifier board which has "floating" outputs, i.e. the -ve output terminals are not connected to ground.
I want to measure the power output and clipping point of this board ...
- 11
0
votes
3
answers
1k
views
Voltage divider from speaker to line level generates noise/huming
I have a really old device and I can only access the speaker wires of it. I want to setup a line level from the speaker so I can connect it to another device.
I used a very simple voltage divider (2 ...
- 85
-1
votes
1
answer
93
views
Audio transformer power level
I am going to use SP-69.
https://catalog.triadmagnetics.com/Asset/SP-69.pdf
Its power level is 50mW.
I am going to use DRV135 to drive audio transformer(SP-69).
Output voltage of the DRV135 is 7Vrms(...
1
vote
1
answer
129
views
5 V, 2A cable and audio cable run parallel into circuit board, board fries, how?
This is a sort of forensic electronics case, where a circuit board was fried and we are trying to understand how. Perhaps someone can help or at least be entertained by this question.
I sent a sort of ...
- 111
2
votes
2
answers
724
views
Watts P.M.P.O. and audio equipment power
I am a beginner in electrical engineering, and to begin learning I decided to look into audio amplifiers.
I have seen that the power of audio amplifiers is often described in the units of watts, watts ...
user271600
-1
votes
5
answers
145
views
Why is output power such a meaningful quantity in speakers?
Loudspeakers, for example, should be impedance matched to deliver the highest power from the source to the speakers. But why do we care about power so much? A speaker is at its simplest, a coil around ...
- 3,217
2
votes
3
answers
218
views
Troubles on powering two (audio) circuits with single voltage source
I have a simple audio circuit that needs to be amplified.
The circuit is a CMOS based circuit, running on 9V coming from a 12V battery pack stabilized with a 7809 IC. I have also an amplifier circuit ...
- 43
1
vote
2
answers
392
views
How does this audio power amplifier circuit work?
How do I simulate an audio amplifier in Multisim?
I'm required to search for audio power amplifier circuit and explain how it works in details so I need to know the detailed process of this circuit ...
