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.

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670 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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573 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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558 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 ...
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1answer
143 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
58 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
55 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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38 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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48 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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25 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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53 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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50 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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69 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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306 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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188 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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58 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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106 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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78 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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39 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
179 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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89 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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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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279 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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128 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
72 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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1answer
17 views

SIM800L EVB audio output on Raspberry Pi

I have a SIM800L EVB GSM module connected to a Raspberry Pi and it is working correctly. However I did not find any pins related to speaker or audio output as shown in the wiring: This is different ...
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34 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
50 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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39 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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38 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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55 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
64 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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41 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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29 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
31 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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62 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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15 views

Interfacing RN52 with SIM800C

I am interfacing an RN52 with SIM800C to make calls to and from the bluetooth device and so i have connected the speaker line of SIM800C to the mic of RN52 and the mic of SIM800C to the speaker of ...
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63 views

Reducing Speaker Volume

I have Hi-Fi speakers (1x tweeter/1x mid/2x woofers) that can be made bi-wired by removing the shorting bars on the binding posts. It has 3 crossovers. The speaker is 8 ohms and my amp 80 watts. ...
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44 views

Doorbell intercom speaker replacing

I think I came to the right place to ask this question. I have an 20 years old Siemens intercom and it didn't speak anymore to the person outside ringing the doorbell. There are 2 'phones' in the ...
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22 views

Music instrument combo amp needs conversion to a part time speaker cab

I bought an Acoustic brand 20w bass amplifier that has a 12 in speaker in the closed back cabinet though the amp itself is accessible. Two disconnects separate the amp from the spkr. I want to use the ...
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85 views

Calculate actual power of speaker

I have a sound system: 8 speakers, 1 amplifier (4 channels). Speakers were connected in parallel. I want to calculate actual power on each speaker. Specifications: 8 speakers: Woofer (4): Power: ...
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142 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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1answer
565 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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43 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
66 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 ...
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1answer
48 views

Battery wiring for DIY speaker question

could anyone tell me if i can wire the 12V battery to get around 20V out of the whole set? Right now it's wired in parallel which increases capacity but i need around 20V for the amplifier to have ...
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0answers
579 views

Headphone Jack Detection Mechanism?

I am trying to build a circuit that turns on a speaker when headphones are unplugged (so it like how our phones detect when our headphones are connected). To do this, I was thinking of simply using ...
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0answers
31 views

Unwanted buzzing and reduced volume in a basic speaker set

I have the following device, which basically contains 18 songs. we can play the next song by switching the switch on and off. It also has a volume control. Recently it started to buzz a lot and the ...
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2answers
736 views

Hummm Sound from stereo speaker when used on inverter

I have a normal 2.1 Stereo speakers with an aux 3.5 cable coming out as input source, i plug this aux cable to a source when needed else it remains hanging, whole speaker this is plugged in to an ...