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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35 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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3answers
155 views

How do I design preamplifier and amplifier (for a speaker) circuits from scratch? [closed]

I am 3rd year electronics student. I want to design a speaker from the circuit level. As this is my first time, I have no clear idea how to start and where to start. Can anyone please suggest to me ...
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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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62 views

Is it normal for a Guitar amplifier to have dc voltage across the output before a blocking capacitor?

I don't tend to post questions on online forums so I apologise in advance if I've messed up here. I'm currently trying to work on an old transistor guitar amp and in taking measurements managed to ...
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2answers
68 views

How to choose speaker impedance for a VERY specific application?

Ok, so this may be a long post. I want to preface by saying I have very limited electrical engineering knowledge, so thank you in advance :-) I'm working on a medical device for a college project. ...
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37 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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32 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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1answer
43 views

Are passive piezo speaker more reliable than magnetic ones?

I'm going to use sound notification in my desing (just beeping). My buzzer needs to be suited for cold ambient conditions (up to 0 celcius degrees), high humidity and shocks. Which buzzer type will be ...
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1answer
46 views

Speaker producing static noise

I have a set of speakers which has been standing in a humid place for a few months. One of them still works perfectly fine, the other not so. The other speaker creates a very static noise, barely ...
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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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1answer
67 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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2answers
40 views

Lower volume of subwoofer

I have a 5.1 dvd player. The volume of subwoofer is high even after setting low in remote. Is it possible to lower volume by adding resistor between dvd player and woofer output line. If so how much ...
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1answer
39 views

Modification of Speaker-System to operate at 12VDC (Logitech Z903)

The aim of this modification is that the speaker system (Logitech Z903) is working with 12V input (don’t worry about the Amps). The power supply of my Loudspeakers has an Input of 220-250VAC @50Hz ...
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1answer
37 views

PSpice library for a speaker?

I am trying to simulate a current driver using TIP31 transistor for a speaker with known resistor and wattage. Can anyone please help me find a PSpice library for speakers? If there is not a library, ...
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1answer
55 views

How to check the power output of home amplifier speaker terminals?

I recently bought a Sony STR-DH800 from eBay and to cut a long story short I'm getting different volume levels using the same speakers across the various speaker terminals. I have a multimeter and I ...
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40 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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23 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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3answers
81 views

Connecting 2 1W speakers

I am trying to connect together 2 1W speakers and mount them inside some ear defenders. I am a complete novice and am following an instructable tutorial. The tutorial is a bit light on the basics and ...
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1answer
35 views

Subwoofer high level connection and Class T amplifier [closed]

This question has a connection to a previous one of mine: I have a BK Electronics Gemini I subwoofer that will soon be spare. It has two inputs called: low level and high level. The low level ...
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2answers
76 views

Speaker impedance and voltage

There is a device which has output impedance 150ohms. If my headphone has either lower(30ohms) or higher (400ohms) impedance can I use it or sound will be too low/high and it will be unsable? Also, ...
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1answer
79 views

Multiple inputs for 5.1 audio system [closed]

this is my first post here and I hope I chose the right SE site. I have a Logitech X-530 5.1 audio system, which is very old and supports input using 3 3.5mm jacks for Front, Rear and Sub (I suppose, ...
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Amplifier speaker outputs: is the black always the chassis?

Any amplifier or A/V receiver that I have seen has a black and a red terminal for each speaker. From 2 pairs for a simple stereo system up to 7 or more for an A/V receiver. It is quite a while ...
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1answer
93 views

What might be inside my speaker switch?

I have a speaker switch which has been in continuous use since some time in the 1980s. It a QED SSU4. To my surprise, there are plenty of pictures on the net and even some for sale. Even more ...
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30 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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2answers
34 views

How can I identify specifications for this possible passive speaker with subwoofer? And what are each wirings on that cable for?

From Reddit https://www.reddit.com/r/techsupport/comments/g5aynj/can_someone_help_me_identify_the_specifications/ I tried to get specifications of a speaker. This one here is specifically for ASUS ROG ...
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1answer
60 views

Can 3Ω speakers match 4~16Ω amplifier? [closed]

I have a set of Samsung home theatre system. The Samsung DVD player is no longer working. I would like to get a new amplifier and reuse the 5 existing Samsung speakers. But the existing speakers are ...
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3answers
127 views

The right way to have amplified speakers that mute when you plug in earphones

I am designing a handheld device that has an I2S DAC, small speakers, amplifiers (~2 watts), and an earphone jack. I'd love advice on the best way to hook these together. My goal is high quality audio ...
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1answer
86 views

Driving a 8Ω speaker from a 3.3v DAC

I'm looking for some advice on driving an 8Ω 2W speaker near full power from a 3.3v DAC. I've put together a current amplifier using a rail-to-rail op amp and two BJTs, but it's not supplying as much ...
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1answer
38 views

How do I look for a replacement speaker? [closed]

I have a Kinera Idun. It's an IEM with multiple drivers (2 balanced armatures for highs, 1 dynamic driver for lows). I was listening to some Lo-fi music when right side bass simply disappeared. I can'...
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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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1answer
50 views

Mr. Smeow's loud, annoying robot dog [closed]

I bought my cat a robot dog for Xmas. He loves it! I currently have taken it apart to clean some accumulated hair out from around some of the rotating parts. It plays music that is kind of loud and ...
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2answers
42 views

removing the pop noise when amp is switched with passive components only

I've recently bought this little 2*3W USB-powered amp and it is working pretty well with my old Panasonic boombox speakers (rated 2.7 ohms, 15w peak input). However when switching off the USB power i ...
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1answer
55 views

What brand is this buzzer?

I have been searching for this buzzer for weeks. Does anyone know what brand it is? It is a surface mount buzzer. I need to know the brand. Approximate dimensions: 8.7 mm x 8.7 mm x 3.25 mm
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50 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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1answer
193 views

Explain “Audio Loopback Dongle”

This AOSP/Develop/Audio page describes the following audio loopback dongle. Can someone explain it? To ensure that the output signal will not overload the microphone input, we cut it down by about ...
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14 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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59 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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1answer
44 views

Designing a bluetooth audio unit for speaker

(Cross posting from Sound design stack exchange since it was declared off topic there) I have a sony speaker from an old Home Theatre System that is broken now leaving the standalone speakers in a ...
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1answer
65 views

How much power is needed to run these speakers?

I have couple of loudspeakers. Each is rated for: RMS Power 60 watts Power 75 watts vc Imp 16 Ohms I am going to build an audio amp for those but not sure how much power is needed. I'm concerned ...
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2answers
932 views

Does higher impedance speakers generate clearer voice?

I have a PAM8403 based amplifier module and going to build a small portable speaker, mostly to listen to lectures and audio books. The module looks like this: First I attached two 4 ohms 3 watts ...
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1answer
60 views

What would it take to add Bluetooth capability to a digital (musical) keyboard?

I am completely new to electrical engineering. I have a software background and have an interest in tinkering with hardware. I'm wondering what knowledge/engineering skill/equipment is required to ...
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0answers
43 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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0answers
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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84 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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50 views

Why connecting oscilloscope reduces noise [duplicate]

I am doing a speaker driver circuit. When I connect the oscilloscope probe to the output (emitters of npn/pnp complementaries) to where also the speaker is connected; the sound of speaker and the ...
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141 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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3answers
67 views

Loudspeaker Efficiency

The nameplate or nominal impedance of most modern speakers is 4 or 8 ohms .It has been known for generations that the Actual impedance varies somewhat with frequency and is not pure resistance ....
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49 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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1answer
63 views

How can I turn a midi keyboard to a stand-alone piano using Arduino or any other way? [closed]

I have a midi keyboard, but I find it frustrating to start PC, DAW system every time I want to play. Is there a way to use Arduino to create an on the go stand alone piano. (It should work like a ...

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