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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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potentiometer volume control of backup beeper

Total newbie here. Please bear with me. I am interested in making a gag gift for a friend, which uses a typical audio mixer slider to control the volume of a typical backup beeper. This is Not ...
Bruce Simonson's user avatar
1 vote
2 answers
132 views

Having trouble with a 555 Astable timer outputting into NPN transistor switch that controls 741 Op-Amp

I have been building a circuit that takes the output of a 555 IC and outputs it into an NPN transistor that acts as a switch to toggle a 741 Op-Amp connected to an 8 ohm, 0.5 watt speaker. I'm new to ...
RetroBoltDev's user avatar
2 votes
2 answers
146 views

what is this part/component in this circuit schematic?

I have a circuit schematic (this is just a part of it): I am trying to find what those little circles above and below the speaker are. I dont think they are part of the speaker itself, as there is ...
Vincent Cerowski's user avatar
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0 answers
50 views

How do you diagnose a fault with a tweeter?

I have a Pioneer XPRS 10 at work that isn't producing any high frequencies; the 10" woofer working fine, but the 1.75" tweeter is not producing any sound at all. It's a 50W, 8 ohm tweeter. I ...
Sputnik's user avatar
  • 101
2 votes
2 answers
129 views

Simple doorbell circuit using transistors

This is a circuit diagram for constructing a simple doorbell circuit using transistors. Can anyone see a fault in the circuit? I've tried it on a breadboard and the circuit works with the buzzer as a ...
Monde Albevar's user avatar
18 votes
2 answers
4k views

What is the purpose of these fat copper coils wrapped around … something?

Dissecting 20-year-old outdoor speakers (SpeakerCraft OE8 One), found this electronics board inside. I recognize the capacitors, but what are the big custom coils of copper wire, and what is their ...
Phrogz's user avatar
  • 293
2 votes
2 answers
103 views

Improving the waveshape and amplitude of a saw-tooth generator

I am a student in in college level physics and so I do not have a lot of knowledge when it comes to circuits and the different electrical components. Still, as a project, I decided to try to build an ...
Boldumus's user avatar
2 votes
2 answers
210 views

Graph plot of sinusoidal current/voltage vs displacement of speaker membrane from its resting position

For a very long time I believed that the speaker membrane just moves according to the amplitude of a electrical signal fed to it. Like, If at any instant, the current/voltage is at c% (0 <= c <= ...
Cinverse's user avatar
0 votes
2 answers
98 views

Driving speaker with differential driver

I am designing an battery powered device (3.6-4.1 V regulated down to 3 V) which plays audio recordings through a speaker (8 Ω, 0.3 W). I want to drive the speaker by applying two differential inputs, ...
dvd280's user avatar
  • 135
-1 votes
2 answers
95 views

Building a unity-gain op amp with speaker?

I am trying to build a voltage follower op-amp circuit to hear a sine wave but I can't get it to work. I was using the LM386 but then found out that it has a gain of 20 by default so I can't use it. I ...
Electrolyte's user avatar
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2 answers
86 views

Using a square and/or sine wave generator through a speaker [closed]

I have recently undergone some university study which introduced square and sine wave generators, I was wondering if there's a specific speaker I could use (its inputs would be a power supply and the ...
sage_lessthan_3's user avatar
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3 answers
96 views

Modify headphone jack to not mute speakers when plugged in (Yamaha HS4)

I have a set of speakers with an additional stereo headphone output on the front. As it is now, when the headphones are plugged in, the speaker mutes, giving output to the headphones alone. I want to ...
Noah Taher's user avatar
1 vote
2 answers
66 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
3 answers
239 views

DIY guitar amp cabinet selector switch

Problem statement: I have 2 guitar amplifiers and I have 2 speaker cabinets that normally connect via speaker cables (1/4" connectors). I would like to create a passive device that lets me ...
Luther Baker's user avatar
-1 votes
2 answers
128 views

Why is the output voltage across the load dropping a lot in this audio amplifier circuit?

I am making an audio amplifier circuit in LTspice. This is the circuit that I've made: Notice that the input is 20 mV. The output plot is as follows: That is around the gain I want to obtain. The ...
Soumil Gupta's user avatar
2 votes
3 answers
677 views

How can we drive an 8 ohm speaker if it can only support around 1.5-2 watts for an Audio Amplifier Circuit?

Goal of the circuit: Must be able to deliver 1.5 W to the speaker (8 Ω) at 1 kHz. First Problem 1.) how can we drive an 8 ohm speaker if it can only support around 1.5-2 watts? Because when we input ...
jaxillrplusone's user avatar
2 votes
0 answers
66 views

High pass filter simulation involving loop outside the circuit

I am trying to model a tweeter filter circuit from GR Research's X-CS Encore loudspeakers, more specifically get the transfer function Vo/Vi. I have included an example of how I did it for the woofer ...
Seth Petersen's user avatar
0 votes
1 answer
139 views

A mini mic speaker circuit

I'm making a mic speaker circuit using max9814 and pam8403. I made the circuit like the picture, but the speaker just makes a long beep and the mic doesn't work. And, i just tried putting the ...
Jjp5045's user avatar
0 votes
1 answer
120 views

Making a mini mic speaker [closed]

I’m making a mic speaker circuit with a PAM8403 amplifier. The performance wasn't good enough; mic sensitivity wasn't good and it didn't really amplify my voice, so I thought about adding a MAX9814 to ...
Jjp5045's user avatar
1 vote
1 answer
107 views

Balance Mic and Speaker for Camera Input with Ground Loop Isolation

Novice looking for some help. I use a Cardo Bluetooth headset to communicate with friends and record the audio onto an action camera while out riding motorcycles. By trial and error I was able to come ...
simi.d's user avatar
  • 13
5 votes
3 answers
391 views

CE Amplifier problem

I am new to learning about electricity and I was trying to make a common emitter amplifier. I did some research and I tried to make the circuit. The circuit amplified the signal but the signal was not ...
Marcus Marchese's user avatar
0 votes
2 answers
104 views

How can I wire the speaker given in this schematic? Does the light green addition show it correctly?

Taken from this video. Will it work correctly with the speaker connected as shown in green?
Alex C's user avatar
  • 105
0 votes
1 answer
56 views

Speaker and buzzer sound levels issues

I have designed two test boards to evaluate the sound levels of several speakers and buzzers. While the buzzers are functioning as expected, the speakers are producing sound levels that are ...
Dario's user avatar
  • 19
1 vote
3 answers
241 views

Piezo transducer as both microphone and speaker

I'm trying to find the best piezo transducer for my project, which is a Morse code sender and receiver. Since a piezo transducer can both act as a speaker and a microphone, and I only send/receive at ...
Björn Morén's user avatar
0 votes
2 answers
120 views

Speaker draws way more peak current than RMS calculations would imply, how do I deal with that?

So, for a project I'm working on, I'm trying to drive a small-ish speaker (Visaton SL87XA, 4 ohm version) using a FET H-bridge driven rail-to-rail from a RE46C100 horn driver chip in what's ...
ThreePhaseEel's user avatar
6 votes
3 answers
2k views

Why am I getting heavy output distortion from a BJT amplifier when driving an 8 ohm load?

Hello electronics professionals and enthusiasts! Software engineer mingling with breadboards and discrete components in his spare time here. I'm trying to build a simple BJT amplifier for my electric ...
Alex's user avatar
  • 71
0 votes
0 answers
218 views

ESP32 I2S with a MAX98357

I have hooked up an ESP32-WROOM to a MAX98357 I2S Amp. I'm using the ESP32-audioI2S library playing from an SD card. ESP is USB powered while the amp is powered from a bench power supply. I'm using a ...
MustSeeMelons's user avatar
0 votes
2 answers
134 views

Can I Use a MOSFET In Series With My Speaker?

I'm normally a software guy, so please bear with me :-) I have a TDA2030A amplifier board like this one that I'm using to play audio through a small speaker. I have a microcontroller which I want to ...
CarmenCarmen's user avatar
0 votes
1 answer
76 views

Choosing speakers for a robot [closed]

I'm very new to digital audio. I bought these microphones. I would like to create an echo by speaking to a mic and playing it back using an ESP-32 WROOM board. When I choose speakers, what ...
kovac's user avatar
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-2 votes
4 answers
1k views

Do speakers run on AC or DC? [closed]

Do speakers run on AC or DC? I read online that every speaker runs on AC, but I think that is not quite correct.
Mr.Ananas's user avatar
0 votes
2 answers
256 views

I need help setting up a guitar speaker jack plate

I have a 1x12 wedge cabinet I'm repurposing into a guitar speaker cab. It has a jack plate with two 1/4" mono jacks. What I'd like to do is reset the jack plate in such a way that it can: Run ...
kkitchen63's user avatar
0 votes
2 answers
166 views

Can we place capacitors parallel to the speaker (30 ohm headphone) and aux jack?

I am working on an audio amplifier PCB circuit, where I have used LM386 as an amplifier, an aux jack for audio output, and a small speaker of headphones (30 ohm). I have two 220 uF molded and one 470 ...
Noor Hassan's user avatar
0 votes
0 answers
34 views

How to increase headphone jack volume output on a Bluetooth speaker

We have a rechargeable Bluetooth speaker with a 3.5 mm headphone jack. We often connect pillow speakers to that headphone jack to help manage tinnitus at night. The challenge is that the pillow ...
Marketing Guy's user avatar
0 votes
2 answers
67 views

What's the relationship among speaker amp IC's supply voltage and gain?

I am new to designing audio circuit. Looking at TI TAS6424 class-D amplifier (https://www.ti.com/lit/gpn/tas6424-q1), on section 9.3.3 p.23, it mentioned volume control from -100 to +24 dB. Given the ...
jsmith's user avatar
  • 669
0 votes
3 answers
231 views

Connecting a single 8 Ohm speaker to 4 Ohm stereo output

I have an amplifier that has stereo outputs for two 4 Ohm speakers. Now I want to connect a single 8 Ohm speaker to it. How should I go about this? Can I simply unite the two stereo cables and connect ...
user1785730's user avatar
0 votes
0 answers
83 views

2-way speaker system tweeter phase

I'm in the middle of replacing stock speakers in the car with aftermarket speakers, and I've redone one door. The better difference in quality is very pronounced, but I wondered if I connected tweeter ...
zmechanic's user avatar
  • 304
0 votes
1 answer
69 views

I want to implement a 2-active crossover circuit with LM833 and amplify it using LM386 and now the problem is I couldn't understand the circuit [closed]

I can understand up to certain level that we used a buffer, low pass filter but I can not connect with circuit and coming to components we used 120 Ω, 6.8 nF for active crossover with power supply + ...
Yuva Praneeth Reddy's user avatar
-1 votes
4 answers
344 views

Lowering power output from amp to speakers [closed]

I have a pair of 8 ohm speakers that are rated for max 60w and a receiver that outputs 160w and is rated for 8 ohms. I wired everything up and, as expected, even at minimum volume it was too loud. I ...
terminalPoltergeist's user avatar
0 votes
1 answer
34 views

Can I draw power from one cell while charging 5 in series?

I recently watched this video by DIY Perks and I want to build some bluetooth speakers using the electronics from a pair of Bluetooth earbuds and a class AB amp for some 10w speakers. Very similar to ...
Adam Hey's user avatar
  • 103
0 votes
0 answers
52 views

Help On Dual Amplifier Design

I am pretty new to electronics and so far, have been teaching myself and designing things with the help of the internet. I made and designed a class-AB amplifier circuit that drives two 8-ohm speakers ...
Glenn Krause's user avatar
0 votes
1 answer
496 views

Bluetooth speaker - power supply

I have some 10 W, 8 Ω speakers. I'm building a Bluetooth speaker set. I've hooked up a 3.7 V, 8000 mAh portable charger battery to an XL6009 buck converter to pump it to 9 V. I have a Bluetooth audio ...
Hayden's user avatar
  • 11
0 votes
0 answers
53 views

How can my crossover be improved? Efficiency is too low

I have been working on redoing the crossover for a pair of Dayton audio B652 Speakers, and have just been working on it through a breadboard for practice. I bought a bunch of cheap parts from bojack ...
Jake Slavin's user avatar
1 vote
1 answer
135 views

Fix for poorly designed class-D amplifier mute circuit

I recently made a PCB for a project with several class-D amplifier channels to drive small speakers for audio feedback. I included a mute switch which connected or disconnected one end of these ...
Emmett Palaima's user avatar
0 votes
1 answer
146 views

How to replace an 8 Ω, 0.5 W speaker with a 8 Ω, 1 W speaker? [closed]

I have a cuckoo clock melody circuit that is connected to the 8 Ω 0.5 W speaker and I want to replace it with the 8 Ω 1 W speaker. When I connected it the output was not that much great as the 0.5 W ...
Nayan Panchal's user avatar
0 votes
1 answer
182 views

Lower volume on doorbell speaker

I have a really loud and "angry" doorbell that I would love to be able to adjust its volume. Unfortunately it doesn't seem to have a volume control function so I decided to try and hack it. ...
ktsangop's user avatar
  • 103
1 vote
1 answer
33 views

Replacing a compressor/whistle with speaker for coaching program?

We have a current setup of using a whistle in coaching situations for starting sequences. I built a small RaspPi box that, through a 12 V relay, will enable a compressor with a regular coach whistle ...
bcardarella's user avatar
1 vote
1 answer
74 views

Designing an audio output circuit with 3 note polyphony for PIC18F45K20

Our project outputs three square waves from the PIC18 and is currently designed to go into an LM324 summing amplifier and then an LM386 audio amplifier to drive an 8ohm speaker. However, we have run ...
HCon's user avatar
  • 11
0 votes
1 answer
63 views

How to calculate watt-hours used by the @channel Slack notification sound

Imagine someone used @channel in a Slack channel with 100,000 people. How many watt-hours are used to play the Slack notification on the laptops for these 100,000 ...
Indigenuity's user avatar
0 votes
2 answers
207 views

How to calculate SPL change from a sound source to a listening position?

I need to know how to calculate SPL change from a sound source to a listening position. I already know the distance between the speaker and the listening position and also the SPL at the speaker.
parvin's user avatar
  • 145
0 votes
1 answer
105 views

Boost circuit for speaker

Years ago I build a mobile speaker with a battery inside but because of the battery dying, I decided to try to run it off USB power. The speaker is an old Creative T40 speaker and they run on 27 V so ...
Tok_Tok's user avatar

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