Questions tagged [speakers]

A speaker is a device which converts an electrical audio signal into a corresponding sound. Questions about fixing speakers will be closed as off-topic.

72 questions with no upvoted or accepted answers
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700 views

Connect speaker directly to Samsung Galaxy S6. Minimum impedance accepted

I want to connect an external (passive) speaker (3W/16 ohm) directly to my Samsung Galaxy S6 using the headphone jack. I want to do this on my bicycle using the smallest space possible. Connecting the ...
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2answers
276 views

Measuring RMS power output from audio amplifier channel

I am looking for a simple way for getting the RMS power output of an amplifier channel set to some arbitrary gain. I want this in order to find the maximum level I can safely set the amplifier at for ...
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883 views

How to prevent my audio amplifier cutting out?

Design Problem: Since I moved into my dormitory for university, I wanted to have a simple audio setup which had a good frequency response. Therefore I bought the Edifier R1280DB, a bookshelf speaker. ...
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0answers
626 views

Modded speakers emit high frequency noise, how to filter it out?

I came up with an idea to convert my PC speakers into Bluetooth speakers. It's not really a serious project, rather a proof of concept, but I want to get it to work as well as possible. Here's my ...
2
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1answer
156 views

How does the center tap terminal work in Knowles Speakers ED series?

I would like to understand how the center tap terminal work in miniature speakers. I can see in the datasheet that a positive going voltage relative to this center tap can lower the output volume but ...
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1answer
72 views

Idea for a PC bios beep buzzer

Hi I want to make a buzzer for my PC motherboard. Similar things like this: https://boip.in/home/rajiekart-pc-motherboard-internal-speaker-bios-alarm-buzzer-1-pcs-pack?gclid=...
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2answers
75 views

Tweeter speaker enclosure size and material

I try to make a system that generates high frequency tones ( 12-17kHz ) only. Use some cheap tweeters like : https://www.banggood.com/100W-Piezo-Horn-Speaker-Tweeter-30KHZ-Piezoelectric-Head-Driver-...
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47 views

Frequency response measurement problem with mobile phone: same (wrong?) readings for different speakers

I have built some bespoke speakers and tried to measure their frequency response. My rig is: Source: Android phone Samsung A3 as a source, playing frequency sweep using Android's Frequency Generator ...
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189 views

Replacing a Li-Ion battery with a capacitor and power supply in a bluetooth speaker

I have a Philips BT3500 speaker with a dead Lithium Ion battery. I want to be able to use the speaker without the battery - using just the power supply. It used to work for some time with the usb ...
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0answers
35 views

Troubleshooting adding a bluetooth receiver to my intercom system

I have a Nutone IMA 4406 intercom system with several intercoms throughout the house. I am interested in wiring a Bluetooth receiver to its Auxillary line in connection so that I can stream music ...
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72 views

Audio Loopback Dongle Sanity Check

The same circuit as in Explain “Audio Loopback Dongle"; I wanted to know how it worked. Anything I couldn't figure out I found out via CircuitLab's time analysis: simulate this circuit – ...
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0answers
89 views

How to approximate/model a speaker

I am working on driving an 8 ohms speaker. I am currently modelling(in Ltspice) it just as an 8 ohms resistor. However this is probably far from being realistic. I don't want/need too much precision ...
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70 views

Buzz/hum from powered desktop speakers

I’ve been trying to revive a set of vintage Apple-branded powered desktop speakers. Nothing more than a gunked up potentiometer and a broken solder joint on the input and they’re now working again. ...
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0answers
1k views

Can I make this Bluetooth speaker stop cutting off its speakers when audio signal goes silent?

I have a simple Bluetooth speaker that always seem to cut off its speaker circuit when the audio stream goes silent. This makes an audible popping noise, which is repeated when the stream starts ...
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0answers
290 views

Driving a piezo speaker at 40 KHz

I'm trying to drive this piezo element at 40 kHz but am running into troubles when using a function generator since the element requires greater drive. I got the guts of an ultrasonic cleaner to ...
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70 views

How does speaker in “ROBOCOPP B A S U Ealarm SOS Personal Alarm” works?

I was working on a project which required producing a sound with more than 125 DBs...then I found this device in market which claims of producing 130DBs although to my knowledge it produces around ...
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0answers
107 views

What is the name of these colorful connectors?

What is the name of these colorful connector? Standard one or priority? One of the molex family? What is the exact name? PS: The connector is used to attach speakers. There is a marking on each one ...
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0answers
81 views

Crackling sounds when both speakers are connected?

I have finished my amplifier using the LA4597 chip following the schematic below. So far everything's working fine. However, I noticed something. Some songs crackle the speakers (probably because of ...
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42 views

6 SPEAKERS one amp

I just joined stack exchange to ask this specific question. I have 6 speakers. All 6 are 8 ohm speakers. There are 2 pairs (Speakers 1&2 are pair A and speakers 3&4 are pair B and then 2 ...
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1answer
224 views

Tweeter speaker crack on turn on/off when ultrasonic signal is played

I wired a Fostex FT17H to a YAMAHA R-S202D receiver and put a 1µF capacitor on the + line (like the manual suggests). If i play now a "normal" audio file (<20kHz) everything is great but when I ...
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0answers
90 views

How to measure what impedance speaker to use

I have an old cassette player, which doesn't have a speaker (it was taken out before). Can I measure somehow, what impedance speaker should I connect to it?
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0answers
3k views

Speaker protection using only zener diodes?

It is crucial to match amplifiers to speakers correctly and use them with care. But in some cases you want extra protection from blowing up the speaker. I have thought of a ridiculously simple idea -...
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0answers
280 views

Correct way to power an 8 ohm speaker

I designed and simulated a tone generator of some sort using multism. I got some parts of the circuit online. When I tested it on a breadboard, the speaker didn't make any sounds. ere is the circuit: ...
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131 views

Speaker designed for ultrasound operation

I've created a transmission protocol in order to transmit information bits between a PC speaker and a smartphone, or between 2 smartphones using ultrasounds. I've implemented a QFSK system which uses ...
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1answer
101 views

Directional Speakers

I am working on an exhibition where I want to use DIY, self-made directional speakers for transmitting interviews to the visitors. Until now I have seen a couple of video on Youtube like the one ...
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1answer
32 views

Audio playback information when pressing buttons (school project)

My son is making a display (about A1 sized card) about space for school and I am trying to find out a simple way to add some buttons, that when pressed plays an audio recording with info about ...
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52 views

Replacement capacitors for Celestion DL6 crossover

I have a couple of Celestion DL6 speakers that are more than 30 years old. Not quite as good as they used to be, it seems. I assume the electroytics deteriorate? In which case I need to replace them. ...
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37 views

Can speaker impedance change over time?

Backstory I've got these old Technics RP-F600 headphones in my closet that I wanted to use. I bought them ages ago (don't remember, probably over 10 years ago), and for the past year or so they've sat ...
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37 views

Transformer coil (reactor) inductance value in AC (El type)

I want to use one of these inductors (EI type transformer coils with air gap) in series to a speaker (woofer) to filter out high frequencies. https://www.hammfg.com/electronics/transformers/choke/195-...
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4answers
71 views

How to calculate the expected output current being drawn by a speaker?

I'm trying to calculate the current that will be drawn by a 4ohm 3W speaker from a MAX98357a IC amplifier. From my understanding, the amplifier takes in a I2S audio signal (which originates from an ...
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32 views

How to produce sound when a certain condition is met in proteus?

I've made a 6-bit counter with 6 JK flip-flops that can count from 1 to 33. After it reaches 33, the circuit will go back to zero. I want the circuit to produce a sound when the counter reaches 33. I ...
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44 views

Transformer hum coming in audio amplifier

I made an audio amplifier with a 6283 IC. When I power the amplifier with a 12V battery it works fine without any hum. When I power the amplifier amp with a 12V powered transformer, hum comes from ...
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48 views

Can I replace a music toy speaker with a 6.3mm jack?

This toy keytar gas an 8 ohm speaker and adjustable output volume. If I simply replaced the speaker with a 6.3mm jack to use it with guitar pedals and speakers that can handle the line level, would I ...
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0answers
31 views

Passive LC low pass in combination with series resonant/ band stop stage

I found this crossover circuit in a construction set and it puzzled me a while. I have absolutely no idea, why I should combine a 2nd order low pass with half a band stop. The low pass alone has a ...
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1answer
211 views

What Is This PCB Component? (Sonos Play 5 Gen 1 Speaker)

I have a Sonos Play 5 Gen 1 Speaker and everything is working on it perfectly except that it makes this constant whistling / buzzing sound whenever the power supply is plugged in. Dug into it and ...
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0answers
240 views

Help with connecting two passive speakers to a 3.5mm stereo jack

Help, I want to learn how to repair my speakers. I have a 2.1 system (subwoofer + 2 stereo speakers) which sounds really great and it would be a shame to lose it as I've grown fond of the sound, and ...
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1answer
53 views

How to route audio between different “groups” of speakers

The title for this question might not make a lot of sense, and for that I apologize. I am currently working on setting up electronics inside a school bus to RV conversion I've been working on. For the ...
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40 views

Making subwoofer for car, without amplifier

So, I have these two things and I want to achive a good subwoofer for my car: an 5.1 home theater system with a 20-30w 4ohm subwoofer and a radio player in my car with 4x45w 4ohm output for speakers. ...
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0answers
40 views

Match Digital Amplifier to Audio Speaker

I am working on a Raspberry pi audio project and need help creating the proper schematic. I am given: a amplifier detailed here a vanilla audio speaker with 5 W rated input power and 4 ohm impedance ...
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0answers
66 views

Why does my BA speaker truncate the negative part of the waveform?

I'm developing a custom earphone and I'm having some issues with producing a clean sound from my balanced armature (BA) driver (Sonion 31D005/8). I've come up with a pretty standard circuit (see below)...
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1answer
208 views

Drive in movie speaker via bluetooth and mini amp

I need some technical help that I believe a site like this could answer. I bought some drive-in movie speakers which I restored by cleaning up and replacing the old 4" drivers.The 2 drivers are 4&...
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0answers
49 views

Buzzer Voltage and Current waveforms

I have a buzzer circuit. Waveform : My questions : I have marked the points in the circuit where I am measuring the voltage and the current. PWM pulse is given to the base of the transistor. I ...
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0answers
38 views

Intercom System

I am trying to make a prototype to test a circuit. It is about am intercom circuit. I have an intercom device with 2 wires, and it supports multiple stations and everybody can talk and hear at the ...
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0answers
32 views

Do active PZT audio buzzers (with built-in driver) create dangerous spikes on power supply?

I am planning to add a active piezo element audio buzzer with built-in driver (BESTAR BPT-14X or LOUDITY LD-BZEL-PB04-1408 ) to my recent quite complex MCU project. These buzzers come with built in ...
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0answers
70 views

Horn power amplifier design

I need to design experimental prototype of power amplifier (PA) for a horn speaker. The PA should support 100W RMS @ 8ohm. Power supply voltage is 12V. My first (and probably most simple) idea was to ...
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0answers
148 views

Where might the noise be coming from in this speaker driver circuit?

Well, it will be a broad schematic. To summarize, there my approach is: Yellow part is for oscilations at three different freqs(around 0.8 - 2 kHz, different for each of the three signals), ...
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2answers
916 views

pam8403 using low wattage speaker

I am using the output of usb sound card as an input to PAM8403 ic with specs from datasheet. However i am using 4 ohm 0.5 W speaker. So i have tried testing with that and it works but sometimes with ...
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0answers
44 views

Allowing different inputs without needing to alter gain every time; a situation for a pre-amp?

The goal I am attempting to make a small diy bookshelf speaker system using 2 16ohm, 25 watt speakers and a 2x25 watt class d amplifier board. If it matters, the amplifier board is a class d amplifier....
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1answer
48 views

Want to create a box that allows speaker switching with my amp

I came up with an idea that is likely not worth the trouble, but I love tinkering so I'm curious to see if it's possible. In short: I have a guitar amp head. It requires 16 or 8 ohms speakers. For ...
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2answers
129 views

Measuring unknown speaker/piezo element

I have an assortment of small speakers/piezo elements and I'd like to connect them to an arduino without damaging either. I don't know what characteristics the elements have or what to look for but I ...