All Questions
Tagged with impedance-matching audio
24
questions
2
votes
5
answers
439
views
Do audio impedance mismatches cause reflection (ie, 8-Ohm output to 20kOhm input) ? Does it matter?
I understand that audio source⇒input impedance mismatches are normal, and this answer provides a good reason as to why. However, having worked with RF more than audio, mismatches cause reflection that ...
- 2,190
1
vote
1
answer
128
views
USB audio (TRRS) to transformer for impedance matching
I'm kind of stuck, and not really sure where to look, or what to look up.
I need to take the output of a USB audio fongle that has a single 3.5mm jack (TRRS), into a break out cable, and then need to ...
- 11
0
votes
1
answer
129
views
Building an attenuator
I need to build a basic attenuator and wonder if someone could help.
I have updated my post to try and make it clearer what my problem is:
One end of circuit is a WiFi headset unit. Mic output is 2.5 ...
- 1
0
votes
1
answer
105
views
Different audio sources using analog MUX and ADC
I'm doing a project that the idea is to accept 3 audio inputs: 1 amplified input (27Vpp), a pre amplified input (6Vpp) and a microphone input (About 150mVpp).
Both amplified and pre amplified signals ...
- 11
3
votes
3
answers
2k
views
Simplest way to check if an audio level is line or micro?
I can check level audio on a VU Meter or dBFS meter. What's the simplest way to check if an input audio level is line or micro? Can I use a multimeter?
- 175
3
votes
4
answers
1k
views
Impedance matching between two ("prosumer") audio devices [closed]
I would like to send an audio signal from a Presonus HP4 headphone amplifier to a Zoom H4n "handy" recorder, but I am having difficulty understanding the role of impedance in this setting.
...
0
votes
1
answer
586
views
Resistor circuit to correct impedance matching and attenuate signal by 10 decibels
I've got a Line Out on my amplifier with 100-600 ohm impedance (avg. 350). I have it connected to an effects pedal that has a 1M ohm input.
Right now the signal is clipping from the amplifier and I ...
- 105
-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
0
votes
1
answer
118
views
How to send this signal to a mixer?
I have the receiver
which works when I wire a Hifi on the output. But when I try to send the signal to the port 2/3 of the following mixer
then I don't have any signal anymore. I guess I need to ...
- 5
0
votes
1
answer
181
views
Impedance matching between CSR8675 and a MM20 microphone
I'm building my own (rugged) headphone. I am planning to use a MM20-33639-000 microphone with CSR8675 DSP. My question here relates to impedance matching.
Based on what I have read, most modern ...
1
vote
3
answers
250
views
Output impedance and loudness
I've a DAC for headphones (GeekOut 720) which has two output jacks with different impedances: 47 Ohm (with a large headphone icon next to it) and 0.47 Ohm (with a small headphone icon next to it).
I'...
- 113
1
vote
2
answers
2k
views
Unbalanced to balanced variable impedance matching
I want to design an impedance matching transformer to convert an audio line from unbalanced ( stereo phono jack type) to a balanced type ( XLR jack with 600 ohms). What can be the easiest way around ? ...
- 391
2
votes
2
answers
829
views
How to increase sensitivity of audio-frequency pickup coil
I am building an instrument intended to pick up weak (~100 picotesla) 25 kHz oscillating magnetic fields with Faraday induction.
As shown in the photo, I have a 4-layer solenoid coil for pickup ...
- 155
0
votes
2
answers
377
views
Match impedance from 600 ohm/2kW tube amp to 8 ohm/25W speakers
Would you please help me to think how to choose an approximate transformer with the least losses for my application? No exact transformer available at market.
Is it best, say, taking a 2600/8 ohms or ...
- 15
1
vote
2
answers
646
views
Troubleshooting noisy FET buffer for contact mic
I'm trying to follow the schematic on this page to create a preamp/impedance matcher for a balanced piezo contact mic. I've reproduced the schematic below.
I've built it on a breadboard and I'm ...
- 123