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Questions tagged [headphones]

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TPA6111A headphone amplifier oscillation

I came up with this simple circuit to mix two small audio signals (about 0-400mV) coming from a pair of DAC output channels, and provide an headphone output with the help of the TPA6111A2. I ...
Dimitri Petrucci's user avatar
1 vote
2 answers
118 views

DC offset on headphones output

I'm using this circuit as headphone output driver of a digital audio synthesizer that I'm building. The signal "DAC-OUT" is coming from the internal DAC of the microcontroller, and can reach ...
Dimitri Petrucci's user avatar
1 vote
1 answer
64 views

Crystal radio antenna question

I am trying to make crystal radio. I have almost everything I need (magnet wire, high impedance headphones, germanium diode.) The only thing I am missing is the antenna. I know that if I want to ...
LaCalienta's user avatar
0 votes
1 answer
77 views

TRS headphone output socket that may be used with a TS mono jack: how to prevent short to ground?

I'm using a TPA6132 headphone amplifier connected to a stereo (TRS) output socket. In my application, the output will usually be used as a line output, and only occasionally with headphones. The audio ...
one_three_three_seven's user avatar
1 vote
1 answer
102 views

TRS headphone jack wiring

Summary: I have an in-ear-headphone that I am trying to replace the TRS jack for. I have tried soldering the wires to a jack a couple of times with the same no-good result. The left speaker doesn't ...
Snowplow4371's user avatar
0 votes
1 answer
62 views

Ideal headphones impedance/sensitivity for op-amp

The maximum output voltage of my audio source is 3 Vpp and the maximum output current of my amplifier (op-amp AD4075-2) is supposed to be 45 mA. What would be the ideal impedance and sensitivity of ...
Domingo's user avatar
  • 109
0 votes
1 answer
62 views

Options for line output doubling as headphone output

As the title says, I'd like a combined line/headphone audio output with the following design criteria: ideally driven from 5V single supply (12V available, but noisy) flat frequency response, also in ...
one_three_three_seven's user avatar
1 vote
2 answers
69 views

7 contacts 3.5mm jack socket: automatic speaker headphones switchover

Edit: The output is mono on both headphones and internal speaker, despite the new connector being stereo. Original: I only have a mono audio source, and the new socket has dedicated pins for the L/R ...
lupolucio's user avatar
0 votes
1 answer
60 views

Tiny/no output from CMOY headphone amp

I've built this little amp around the classic CMOY design, but don't seem to be getting any output except for a tiny distorted signal, in both unity and with 10 kΩ resistor position on the relay. If I ...
Chris Barrett's user avatar
0 votes
1 answer
105 views

When the output power of an amplifier significantly varies despite having a load of much higher impedance than the source impedance

I was looking at headphone amplifiers, and you hear the same thing repeated over and over "at most source impedance is 1/8th the load". The point is to make sure the headphones have a flat ...
Goschie's user avatar
2 votes
1 answer
102 views

How does the voice coil affect volume in DIY headphones?

I know nothing about electrics. I am learning some very basics by making a pair of incredibly simple headphones with a 3.5mm jack, some enameled wire, some magnets, and some paper cups. After a bunch ...
harpomiel's user avatar
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0 votes
1 answer
106 views

Speaker/headphone amplifier switch feature triggered by 'switch' jack

I'm planning to use an amplifier that has both (distinct) speakers and headphones outputs and an input to select between them. Such input switch the amplifier output on headphones if logic level is ...
weirdgyn's user avatar
  • 257
1 vote
3 answers
111 views

Electret microphone to headphone does not work

I would like to make a circuit that takes an electret microphone as an input and the output will be the sound recorded by the microphone with amplification. I've built the circuit with one amplifier (...
arnaudontour's user avatar
1 vote
1 answer
241 views

TRRS headphone and mic swapper

I'd like to create a serial cable link library between two devices called Playdates. They have a TRRS audio jack, and my idea is to use a few cables as shown below to connect each Playdate's audio out ...
dwb's user avatar
  • 111
1 vote
2 answers
133 views

Guitar pickup and headphones common ground

Trying to get rid of cables on stage. Is it possible to have a shared common ground for my guitar pickup and monitoring headphones (with a clip on headphone amp) without getting a signal loop? ...
maxo's user avatar
  • 13
0 votes
0 answers
268 views

D-class audio amplifier like MAX98357A output for headset

The MAX98357A/MAX98357B PCM Input Class D Audio Power Amplifiers as used in Adafruit I2S 3W Class D Amplifier Breakout - MAX98357A specify 4 or 8 Ohm speaker resistance, with 33 or 68 uH inductance. I ...
Øyvind Teig's user avatar
1 vote
1 answer
803 views

Headphone on PCM5102a: separate amp?

My goal is to connect my headphones to either a Bluetooth music audio source via ESP32 and a local source (radio / walkie talkie). I want to use this on my motorcycle for listening to music and ...
Tim's user avatar
  • 11
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0 answers
316 views

Bose QC35 schematics

I'am looking for the schematics of the Bose QC35 headphone. I need to replace the 2.5mm jack on the pcb but I don't find any schematics or SMD part number on the web. These part looks pretty similar ...
zeflex's user avatar
  • 101
0 votes
1 answer
286 views

Bypass broken potentiometer in headphone

My headphone's volume control is broken so I am getting audio only on the left speaker. I have ordered a replacement but it's going to take a few days to arrive. Seeing this question, I had some hope,...
Cesar's user avatar
  • 1
0 votes
1 answer
247 views

How can I use smartphone aux / headphone jack to trigger a MOSFET?

I am working on a security project in which in case of any emergency my smartphone triggers an alarm or sound. This sound is in the form of audio by phone smartphones. When I connect earphone jacks, ...
Aashutosh Soni's user avatar
0 votes
1 answer
181 views

Wiring an Android headset with push-to-talk functionality with active electronics to a standard TRRS connector

I'm using an app on an Android phone that creates the possibility to use the phone as radio with PTT. I'm now trying to build headset with PTT that could interface with the phone's 3.5 mm connector. I ...
TonninSeteli's user avatar
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 ...
sebinho's user avatar
  • 55
2 votes
2 answers
352 views

Analog Android headphone command circuit not working together with microphone

I'm trying to make a headset with microphone (and stereo audio) for an Android phone. The headset will be connected to a 3.5 mm TRRS jack. I have read the specifications for such devices from Android ...
TonninSeteli's user avatar
7 votes
4 answers
3k views

How do high-impedance headphones work?

According to my probably antiquated knowledge I shouldn't be able to listen to anything if I plug my 300 Ω headphones (Sennheiser HD60) in my laptop or my phone, but it does play at a decent volume. ...
Artemix's user avatar
  • 247
0 votes
0 answers
57 views

How to use old wireless headset board to drive an amplifier

I have an old wireless headset which I took apart and used its circuit board to drive a 2x15W TDA7297 amplifier. The problem is, the amplifier sounds at least twice as quiet though Bluetooth than it ...
Παναγιώτης Θ's user avatar
3 votes
1 answer
605 views

What wire runs between two speakers on a headphone, and how do I replace it?

I have a Sennheiser HD 280 Pro pair of headphones. There is a wire running through the bow that connects the left speaker in the headphone to the right one (see drawing, red line), I managed to snap ...
Olaf's user avatar
  • 165
0 votes
0 answers
81 views

LM4910 headphone amplifier noise source

I built a headphone amplifier using the LM4910, following the typical application schematic in the datasheet. The noise floor of this IC is specified at around 50uV for a 32 Ohm load, while my circuit ...
marsbase's user avatar
0 votes
2 answers
104 views

GPD2846A mp3 module with headphones?

The GDP2846A module has an in-built 2W amplifier which is fine for a small speaker but not for a pair of headphones as it is indeed way too much. I've thought of directly taking the DAC outputs (...
Παναγιώτης Θ's user avatar
2 votes
1 answer
131 views

Replacing a virtual ground circuit with center tapped transformer

I just bought a cheap headphone amp (those 47 Amp). I aiming to replace the voltage-divider-virtual-ground circuit with a 12v-0v-12v transformer (ofc with rectification). I checked the NE5532's VCC+'s ...
XtraCode's user avatar
  • 125
4 votes
1 answer
215 views

How to properly couple DC in this biased headphone amplifier design on power-up?

I am a self-study noob to electronics (and audio electronics) but diligently learning every day :) Some things I understand well, others I'm fuzzy on. This device is a headphone amplifier using NE5532 ...
Gbps's user avatar
  • 145
3 votes
1 answer
983 views

Headphone output - what is the function of these resistors going to ground between the decoupling capacitors and headphones

The Korg Monotron Duo synth uses the TPA6111A2 headphone amp. The circuit they use is largely the same as the one from the datasheet - except for R78, the 470ohm resistor going to ground right after ...
Kenny Winker's user avatar
2 votes
1 answer
244 views

How to use the button on a headset?

I want to implement push to talk on my custom PCB. I apply a 2V DC bias on the microphone line of the jack through a 2.2k resistor. While pressing the button of the headset I see the resistance ...
VicMac's user avatar
  • 33
0 votes
1 answer
529 views

What kind of wire is this? Copper wire with some kind of wool in it

I am trying to repair broken headphone wire with this amazon thing. Here is the first pic showing what I am trying to do: I made sure that black wire is working by playing something on the phone and ...
javanoob's user avatar
  • 117
1 vote
1 answer
62 views

Replacing headphone wire

I am trying to replace a broken head phone wire (with three terminals). Here is the overview of the headphone, showing the broken part: Here is the close up of the other end, showing it has three ...
javanoob's user avatar
  • 117
1 vote
3 answers
643 views

Discrete headphone amplifier output stage

What is the role of R13? I tried simulating this circuit using the Falstad simulator and removing it changed nothing. It is a circuit from Small Signal Audio Design by Douglas Self, second edition.
mrazoun's user avatar
  • 13
0 votes
1 answer
87 views

I have an XMOS 7-mic board using the CS43L21 for DAC output. I get it working at 48 kHz, but not at 8 kHz, following the example of XMOS AN00219

What I am looking for is some open driver that tackles more than just 48 kHz. Or a trick, if there is one. PIN30 MCLK gets 24.576 MHz and I have internal counters to count down with, for the speed of ...
Øyvind Teig's user avatar
-2 votes
2 answers
75 views

Do I require an amplifier?

I am planning to do a simple DIY project to replace the cable on my Sennheiser HD 598, which has 50Ω impedance, with a bluetooth receiver, a 3.7V 1000mAh battery (and a charging board). My calculation ...
Abdulsattar Mohammed's user avatar
0 votes
1 answer
959 views

Headphone and speaker switching

I am having difficulty with a headphone plugged in and speaker mute configuration. I am using the SJ-3524-SMT-TR headphone jack and the TPA711DGN audio amplifier IC. What circuitry should I use with ...
Mudassir Ahmad's user avatar
0 votes
1 answer
241 views

Headphones on a line output (vs. headphones output)

I'm designing a device using a DAC (TI PCM 2704 like this one to be precise,) and optionally a headphones amplifier. I noticed that connecting (32 Ohms, closed-back Beyerdynamic) headphones to the ...
Basj's user avatar
  • 1,946
0 votes
0 answers
345 views

Looking for Power Transformer for ECC99 OTL Headphone Amp

I'm planning on building an OTL headphone amp using a pair of ecc99 (I got matched pair of soviet 6n6p in my hand). Eliminating output transformer would reduce the complexity of the circuit and the ...
Moses's user avatar
  • 93
1 vote
0 answers
220 views

1 in 2 out portable headphone amplifier

Here's my idea of a portable headphone amplifier. A line receiver INA1650 (instrumentation amplifier with all its benefits) that feed two LM4880 that drive the headphones (with separate volume control....
Status Re's user avatar
  • 225
0 votes
1 answer
427 views

Soldering headphone wires with another wire

I am trying to solder the wires of a headset back into another wire with the exact same wiring but I’m unsure how to approach the wires that shield the copper wire. There also seems to string in the ...
Johchang's user avatar
0 votes
0 answers
89 views

Telephone headset adaptor weak microphone and speaker sound

I have made a simple adaptor for a telephone P4C4 -- RJ9 -- separate headset output (The wiring diagram of a telephone handset can be viewed in this wikipedia article) to two TRS jack for an ordinary ...
mhmdghfr's user avatar
4 votes
2 answers
1k views

How do I calculate sound pressure level (dB SPL) from headphones at a specific setting on my sound card?

I am using headphones with sensitivity 102 dB SPL / 1 Vrms with impedance of 300 ohms. For a particular volume knob setting on my sound card embedded with a headphone pre-amplifier, I would like to ...
Tanmayee Pathre's user avatar
0 votes
1 answer
86 views

Impedance sensing technology with headphone extension cord [closed]

I have a simple question and I've tried researching the topic but I don't understand the technology. My computer uses impedance sensing technology to set the impedance for headphones. My situation is ...
Jessica M.'s user avatar
0 votes
1 answer
366 views

Capacitor and Resistor Values on Headphone Amp Out (highpass filter)

I'm more of a programmer than someone who knows electronics. Just trying to figure out what forumlas/method to get the right capacitor and resistor values in my headphone out circuit here. Would you ...
Dylan Morrison's user avatar
0 votes
2 answers
366 views

What are the wires of headphones made up of?

Of what material are headphone wires made up of? Are they made up of copper? Can can replace the wires in it with copper wire?
Shudarsan Regmi's user avatar
0 votes
0 answers
45 views

Mobile headset audio OUT to MIC of another mobile using adapters [duplicate]

I want give sound output of one android mobile to MIC of another android mobile using adapters only ( I can not build circuit). One person suggested some work around using adapters , Please find below ...
Dheeraj Chauhan's user avatar
0 votes
2 answers
64 views

Is it possible to run a small circut off the power that is output from a unpowered headphone/speaker?

So I'm currently dreaming up my first PCB project! I would like to make a 1/4 audio switcher for my current audio setup (two outputs 1 input) I'm fairly new to electrical engineering I'm about 3 years ...
Echo's user avatar
  • 101
0 votes
1 answer
104 views

What would be the best, cheapest, smallest way to power a Bluetooth bone conduction headset project?

Please, be forewarned, I'm an idiot when it comes to electronic builds. The last thing I soldered was a pick-up in a guitar kit I built, and the thing still isn't grounded right. I'm trying to build a ...
Ellis Morgan's user avatar