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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Connect 3 mm jack with 4N25 optocoupler to 8 Ω speaker

I want to take an audio signal from a smartphone's 3 mm jack plug, pass it on to a 4N25 optocoupler,, and get the sound from an 8 Ω speaker. I don't know how to connect them to each other. Can you ...
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Difference between speaker and subwoofer voice coil

What is the difference between speaker, woofer, and subwoofer voice coils?
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How to calculate simplified model of speaker impedance given a few data points

I'm given a couple of data points of the impedance of a simplified speaker model (Series R with parallel R, L, C): Re ... DC resistance (the series R) Fs ... resonance frequency (in Hz) Rm ... ...
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Is there a circuit that I can build to allow this alarm device to operate a relay?

I would like to add a relay output circuit to this alarm device to allow it to operate my car horn. The alarm device has 4 different tunes/tones. Each tone plays for about 5 seconds and the next 3 ...
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Question about removing a relay

I've got a subwoofer (JBL SUB138) with an annoying auto-standby feature that I'd like to fiddle with. The feature seems to be controlled by a GOODSKY relay UDH-SS124D and I want to completely remove ...
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TC4056A shuts off at maximum volume (Bluetooth speaker)

I am trying to build a DIY Bluetooth speaker using a 18650 battery cell, a TC4056A battery charger board, an XY-016 that raises the voltage to 6.5 V, a 2200 μF capacitor, and a CSR8645 board. I am ...
2 votes
4 answers
105 views

Switch on when voltage detected

I'm adding a Google Home Mini to an antique floor radio. I don't want to toss the original components, so I'm planning on wiring the speaker to the Google Mini and want to add lights that come on in ...
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1 answer
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DIY electronic doorbell keeps blowing up my cheap eBay car amplifier [closed]

I'm trying to make a DIY electronic doorbell with two speakers (one is nearby but the other is 20 metres away, connected by a solid copper 14 awg cable). It incorporates a timer to turn on the sytem ...
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3 answers
171 views

Using the same power supply produces no sound [closed]

AS SOME OF YOU ASKED, here is the video showing the connection and the problem: https://photos.app.goo.gl/GRsxQ783Rec6jVxo6 One clue that I got today: the problem happens EVEN if I disconnect the ...
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1 answer
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Switching out 8 ohm speakers for original 4 ohm speakers

I've been given an inexpensive "all-in-one" stereo receiver/cd player/turntable that outputs to two tiny built-in 4 ohm speakers. Can I cut out the 4 ohm speakers and route the output to an ...
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71 views

How to electronically sample speaker output

I have a device which, under normal conditions, is connected to a 16 Ohm 0.25W speaker via two terminal blocks. When the speaker is connected it enables the device to play a song or other tone when ...
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1 answer
78 views

Ideas for charging 12v battery

I’m a 17 year old in high school, and for my class project I’m making a cooler with a car radio, and car speakers built in which is being ran off a 12 V battery. It works just fine but I have people ...
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What is the recommended Amplifier/Receiver (AVR) for my Surround Sound 5.1 Speakers Configuration?

Here are my speakers & subwoofer configurations, wondering if anyone can help me suggest a minimum AVR configuration I should go with: I am looking at Harman/Kardon or Denon AVRs. Little back ...
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Connecting resistors to the wires directly decreases the audio output

I am trying to replace a 2 channel speaker with another 1 channel speaker. To do so, I connected every wire (+ & -) to a resistor, then connected both -ves and +ves together (I read how to do it ...
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Loudspeaker alignment graph

Hopefully a simple question. I was wondering what the blue line in this graph represents. This is looking at loudspeaker modelling. The red line is obviously the frequency response as loudspeakers are ...
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Tube amplifier with buzz

I built a tube (UK: valve) amplifier but it has one problem. When I turn it on, it starts buzzing at 150 Hz but only if I connect the audio output transformer. If I directly connect the speaker to the ...
1 vote
1 answer
94 views

Impact of underpowered speakers [closed]

I have an Onkyo TX-8220 Stereo Receiver and a pair of Polk Audio TSi400s. The receiver specs: With 8 ohm loads, both channels driver, [...] rated 45 watts per channel minimum RMS power. The speaker ...
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3 answers
119 views

What is the power consumption of an amplifier while powering a pair of speakers?

I need help getting power consumption to pick the right battery for a portable sound contraption. I have an amplifier with the following specifications: Class D 100 W MAX Power Output X 2 (4 ohms, 20 ...
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2 answers
147 views

How to mount a small speaker inside a plastic case? [closed]

I'd like to mount a small 8W speaker inside a 3D printed plastic casing, and I'm looking into possible mounting options. However, I see quite a few problems. Speaker could shake out from it's position,...
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2 answers
127 views

Why can't I get any output when a speaker is connected to my common-source amplifier?

I'm trying to build a simple amplifier for my guitar. I created the exact same circuit as a common-source amplifier, I biased it on the necessary Q-point, and AC signals are decoupled. It worked ...
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1 answer
239 views

How to tweak my stereo bluetooth amplifier into mono

First of all I'd like to thank anyone who's going to spend time reading (and answering) this. I'm a confirmed software developer and a fellow user of stackoverflow, who knows how boring it can be to ...
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1 answer
191 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 ...
1 vote
3 answers
238 views

Class AB power amplifier output clipping when input exceeds 1.7V

I have a 3 transistor Class AB power amplifier that I referenced from a working design which has different design parameters and biasing than what I need. How I intend on using it, it will be used to ...
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2 answers
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Cleaning old solder joints

I'm doing a restoration/repair project on a set of ~50 year old speakers. I've got a lot of fuzziness coming out of the drivers and I suspect it's from the potentiometers, so I snipped them out of the ...
1 vote
1 answer
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What’s the likely cause of ‘buzzing’ from this hi-fi speaker? [closed]

Something has happened to one of the drivers in my speaker and it’s now ‘buzzing’. (Our cleaners could have knocked the speaker over). There’s no obvious (to me) signs of damage having examined the ...
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How to get rid of the buzzing sound in speakers in a Bluetooth + battery + inverter portable setup?

I setup a bike trailer speaker system. There are two JBL EON610s (these are powered speakers with a built in amplifier,) one Bestek Pure Sine Wave 500W inverter, one 60Ah lithium battery, and one ...
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265 views

Bypassing a tactile push button to switch on an appliance

I've a Bluetooth + Aux speaker which needs to be turned On manually after giving power. I wanted it to start functioning as soon as I switch the power On. I opened it, there was a tactile push button ...
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Identifying and replacing stacking TRS jack

The center/Sub jack on my inspire p7800 connection is terrible. I kinda have to pull it out slightly to work and reached a point there it doesnt work at all. I can't seem to find a replacement part. I'...
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1 answer
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Mechanically alter frequency of audio from a speaker [closed]

I am a programmer and my knowledge with hardware is very limited. So, bear with me with the question I have here. It may also be a dumb question. in short: Can I apply some mechanical changes on a ...
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1 answer
79 views

Miniature speaker gets hot when no signal is fed to it

I encountered a problem with my TPA2005D1-based audio amplifier circuit. When there is no sound output (0V on the signal input to the amp.), the speaker I am using is getting very hot, in contrast to ...
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How to balance resistance between speaker wires made of copper fabric?

I'm working on an art installation where the speaker wires are made of a copper fabric material, a relatively high resistance material. I understand this is not ideal for speakers, but due to ...
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1 answer
259 views

Class AB Amplifier With Single Supply [closed]

I'm designing an amplifier which is to be run off of a single 20 V supply (in the circuit, V+ = 20 V, V- = GND). Q2 and Q3 are used to bias Q4 and Q1. Since the circuit is running off a single 20 V ...
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How to reduce the bass output from an amplifier

I'm using a PAM 8403 mini digital amplifier along with a speaker I took from an old laptop to make a bluetooth speaker. When I connect and play, everything works fine - except when I increase the ...
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111 views

Minimum wire AWG for 4 ohm speakers

I am planning on building a Bluetooth speaker using two of these speakers: They will be hooked up to a Bluetooth CSR8645 board. The length of the cables is smaller than 10cm. I have wired them up ...
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2 answers
115 views

Before build: Will this circuit work, or have I overlooked something?

Some friends and I have given ourselves the goal of building a unidirectional speaker. We bought the necessary components and electronic parts. Before starting to connect everything we wanted an ...
2 votes
2 answers
343 views

Best configuration for ethernet-as-speaker-wire?

I'm hooking up a couple of small speakers (3w max each) outside, and I have a small run in my house from inside to out that was done with ethernet cable. There's no way I can pull speaker wire through,...
1 vote
1 answer
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Designing a model with lights and sound. Looking for feedback regarding powering everything correctly [closed]

I know its early in the year, but I'm designing an Xmas decoration to be ready by December 1st while I've got some free time coming up. The concept is a desktop wooden church that contains a 5W ...
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RCA QU26 Speakers connection question

I'm restoring an old RCA radio from the 1940's. From looking the schematic I have this question: What is the theory behind this speakers connection arrangement? What's the benefit of using an ...
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5 answers
150 views

what do the colours of the wires on stereo speakers signify from old TVs and laptops? [closed]

I have a few laptop and a TV stereo speakers salvaged from old electronics in my possession and I have noticed a pattern that I cannot understand. Both the left and right of these speakers have two ...
9 votes
3 answers
3k views

Why is this 3-way speaker wired this way?

I found a service manual of a pair of 3-way speakers that were part of a mini integrated stereo system. These are Sony SS-H77 speakers, which have served me very well back in the day. Looking at the ...
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Combining two speaker channels (left + and -, right + and -) into a TRS style cable (left, right, common/ground)

I'm currently building a portable stereo speaker and have run into some issues. The speaker is based on a set of broken Jabra Move headphones (used as bluetooth receiver) and a XH-A232 amplifier board....
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1 answer
165 views

What is wrong with my circuit and how can I fix it?

This circuit used to work before I soldered it. When I initially soldered it, I used a 6V battery and it was oscillating, but the speaker was very quiet. I went with a 9V battery and I re-soldered ...
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Why does the subwoofer hum when no source is connected? [duplicate]

The hum at 60Hz stops as soon as an audio source is connected and came with a 2 pin connector. I tried to connect any part of the subwoofer with the ground of a socket. The buzzing stops when no ...
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Do almost all modern smartphones use piezoelectric speakers?

Do almost all modern smartphones use piezoelectric speakers for both the ear speaker and the speakerphone speaker? The reason I ask is because I rinsed off my waterproof smartphone (which I've done ...
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1 answer
64 views

Confirmation of correct voltage and frequency to send to a speaker for it to output sound

If I have an 8 ohm speaker that's rated for 40W (assumed RMS) with a frequency range of 73 Hz to 2500 Hz, and assuming the 8 ohm impedance is the same across the entire frequency range, does that mean ...
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145 views

Subwoofer hums when no audio source is connected [closed]

The hum stops as soon as an audio source is connected or any metal part of the subwoofer is connected to the ground of a socket. Does anyone have any idea what the problem is?
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If I'm wiring a bunch of speakers in parallel, is adding a resistor to the circuit path sufficient to protect the amp?

My house has quite a few outdoor speakers, 6-8 of them. My amp has a "Zone-2" stereo output that I'm planning to drive them with. Each set of speakers has a rotary volume control on a wall ...
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2 votes
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Why does volume above 80% break my speaker (PAM8403, 3w 4ohm, 18650)?

I am new to working with electronics and I am building a simple speaker. The Problem The speaker I built so far (poor sound quality aside) stops working if the volume is above ~80%. By stop working I ...
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1 vote
1 answer
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GND vs COM? Which one should I connect the ground to?

I have a cassette in my car, I was using a cassette-aux adapter to play music through my phone. It looks like this: After searching a bit about how it works, I found out that it's nothing but a tape ...
2 votes
2 answers
751 views

Is it good practice to use diodes in a stereo to mono conversion?

Some background: I am making a VU meter with LED strips using the Alexa Gen 4 Echo as the sound source. I'm planning to modify the Alexa so that I solder external wires to the left tweeter, right ...
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