Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [headphones]

157 questions
50
votes
4 answers

Loud pop noise while plugging to a headphones jack

I have a Panasonic RX-ES29 boombox with a type C plug (ungrounded). I sometimes hear a relatively loud snap/pop sound in the right speaker of my headphones while I completely plug them into the headphones jack of the boombox when it's on. There's a…
Sepp A
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5 answers

I've become an electrical conductor for my headphones... but how?

So I have a pair of Bose noise-cancellation headphones that I plug into my keyboard every night to charge them (via my keyboard's USB port). My keyboard happens to be a metallic Apple keyboard. You will see why this may be important to note…
GDP2
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Why aren't active headphones equalized to a flat frequency response?

Some headphones are 'active', with amplifiers built into the cups and requiring a power source (typically AAA batteries). I then see many audiophiles discussing frequency response as a metric of how good headphones are, and they categorically…
Ehryk
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9
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Can an electrolytic capacitor withstand 0.1 V reverse polarity?

Let’s start the question with a brief description of my application. I am trying to attach a headphone jack with a detect pin to a RDA5807 IC based FM radio project. I am using a separate microcontroller (ATmega8) to detect the insertion of…
aditya444
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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. Does it use a different technology from decades…
Artemix
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3 answers

Low power tube headphone amplifier design

I have never worked or even listened to tubes/valves before, so its about time I did. I wanted a simple design to work with being my first tube project, and have found this from diyaudioprojects.com: After reading some forum posts about this amp,…
G Frank
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5 answers

Why place capacitors in front of the line to a (headphone) audio speaker?

I'm using this module based on the popular bluetooth module CSR8635 https://www.tinyosshop.com/index.php?route=product/product&product_id=875 I was wondering why, in the right-hand side of the circuit, there are two capacitors before the speaker.…
nick carraway
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Making a [4-Pole TRRS to 3.5mm Stereo & Mic Adapter (Male to 2x Female)] from an iphone headphone splitter jack?

I want an adapter that merges the microphone and earphone 3.5 mm jacks into a single 3.5 mm jack ( basically I want to build the blue adapter thingy): I have an earphone splitter for iphones that has a 3.5mm jack as shown below: The problem is how…
K. Rmth
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4
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1 answer

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 opamps in single-supply biased mode, biased with…
Gbps
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4
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1 answer

How do I appropriately power a headphone amplifier and where do I place the volume regulating potentiometers?

At the moment I am building a device that splits an analog stereo audio signal into 3 signals and amplifies 2 signals for headphones. I need to know how to supply -12VDC and where to put the volume regulating potentiometers for each of the 3…
d.oelert
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2 answers

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 the other has a rating of 45 mW at 32 Ω. I guess…
sebinho
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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 this wire. The wire looks like it has some sort…
Olaf
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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 the decoupling capacitors. I'm wondering if anyone…
Kenny Winker
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2 answers

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 determine the output in dB SPL from the…
Tanmayee Pathre
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10Ω series resistor in output of headphones amplifier

I managed to reverse engineer a headphone amplifier in a USB DAC that I bought on aliexpress. As I expected there is a electrolytic capacitor in series to the output, but there is also a 10Ω resistor in series. What is purpose of this resistor? I…
urhen
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